Power amplifier modes explained

[@clintterrill6886]

Best instructional I've seen yet. Clear, Concise and to the point. Well done sir

[@GLBProductions]

Thanks for watching!

[@cradem01]

I've taken the lead on trying to fix my college marching band's speakers. We got a new mixer and I moved the power amps from our old dolly to our new cart. I think when doing so I set all the power amp settings wrong and these 500w power amps through massive speakers are about as loud as I would play guitar in my basement. This video has given me a lot to consider and has made each mode very easy to understand. now that I'm armed with this video, I'm looking forward to trying to fix the speakers

[@GLBProductions]

Hope it all works out 😀

[@DJKANJI254]

So nice learning new knowledge every day. I am a dj and I host events. I have a small sound system that I use in my events. This channel has been so helpful. Good job

[@GLBProductions]

Thanks Kanji, all the best with your music!

[@johncribbs8382]

A great explanation of why a sub would have a optional reverse polarity. If you are running 2 of them.

[@taranpreetahluwalia9646]

STILL HELPFUL IN 2020. Whenever in doubt..I just go back to these videos to help me troubleshoot. THE BEST LIVE SOUND TUTORIAL CHANNEL. I THANK YOU FOR MAKING MY AUDIO JOURNEY EASIER.

[@GLBProductions]

Yes these modes have not changed in decades 😄 Thanks for watching!

[@goyumbod1753]

It was very helpful to me. Because I confused with the modes of amplifiers. Now, I can work with the modes. Thank you.

[@GLBProductions]

You're welcome Tuvshinjargal!

[@rodrigovazquezoficial]

Thank you very much Bruno, I just like to say you’re an incredible teacher! Best wishes

[@GLBProductions]

You're most welcome, glad the video was helpful!

[@joaodias7556]

Clear, well-structured instructions with impeccable didactics. Thanks.

[@GLBProductions]

You're welcome Joao!

[@ivamerelikuivalu9403]

best instructions available. many thanks

[@GLBProductions]

You're welcome!

[@VenerandoMoore]

The instructions are loud and clear! BTW, is channel 1 always designated to left channel?

[@GLBProductions]

Yes, when amplifying a stereo signal channel 1 is always left and channel 2 is right - keeps things simple when troubleshooting.

[@FinalfixMusic]

It's so frikkin informative and should get me my answer but I still have no clue what to do. I wish some guy would use actual amps to explain what's going on. All I want to do is have 2 passive focals connected to my Akai. The akai says it gives 55 watt per channel in 8 ohm, and that's perfect for my focals. So do I just plug them in in the most regular fashion? One speaker to the +&- from A and the other as well? Also, my amp says "A, B = 4-16ohm" & "A+B= 8-16 ohm" That means with my 4-16 setting I'm still safe to run 8 ohm speakers right? I'm scared to blow up these expensive speakers.

[@FinalfixMusic]

The speakers max watt power is 200w and recommended is 40-130 so I should be safe there.

[@GLBProductions]

Yeah, one speaker per channel should be fine. If you are really concerned email the speaker manufacturer directly and get them to clear your choice of amplifier. Remember that even a correctly matched amplifier can still damage loudspeakers if run into clipping for a prolonged period of time.

[@FinalfixMusic]

@@GLBProductions Thanks for your reply! I tried the amplifier but it was not working, my left speaker made no sound unless I pushed the volume to the point where it would distort. I got another amp today, Kenwood kr a5050. Am currently listening finding music to listen to, but they make sound so that's good! So basically you mean when a correctly matched amp is turned up too loud, right? Would I not have to exaggerate in order for that to happen?

[@GLBProductions]

The key is to prevent distortion in any part of your system - once you hear that your speakers will not last long. Turning things up too loud will cause this, or too hot an input from your CD player or other source device.

[@FinalfixMusic]

@@GLBProductions Thanks!

[@stevespeake1]

This is brillant thank you. I've just bought a Warroir Impact 600 Amp for my passive speakers and noticed the red and black binding posts which I've always associated with HiFi speakers. So I'm here trying to find out what they're used for as i dont want to damage my HiFi speakers if I'd plugged them in and found this video. I'm still not sure but now I know about the Bridge etc.

[@GLBProductions]

You're welcome Steve - based on the pictures I can find online that amplifier does not have bridge or parallel modes so it should be pretty straightforward to set up.

[@LoneGRoEnt]

Learn so much from this. Great tutorial.

[@GLBProductions]

Very glad to hear that :)

[@deejaypeter250]

Thank you so much for this your the best teacher

[@GLBProductions]

You're welcome Peter!

[@protoman247]

Thanks for your hard work man. Much appreciated.

[@GLBProductions]

You're most welcome, thanks for watching!

[@Tetelocertified]

Good video

[@GLBProductions]

Thanks for watching Tetelo.

[@ivanravello5687]

2022 and still a great video for audio beginer like me //// i have my old QSC plx 3002 still working ok //// greetings from Peru /////

[@GLBProductions]

Greetings Ivan and thanks for watching :)

[@leewithey2014]

Excellent information!! Thank you. 🐕

[@GLBProductions]

You're welcome!

[@lostmylaundrylist9997]

Wonderful. I very much appreciate the clarity.

[@GLBProductions]

You're most welcome. Hope you found your list ;)

[@markbarnes6806]

Excellent...thank you!

[@GLBProductions]

You're welcome Mark.

[@domingossavio7931]

Thanks you very much Bruno, that’s the theory could you put into practice

[@GLBProductions]

You're welcome Domingos!

[@二加二]

Very good explaination. Thx

[@GLBProductions]

You're welcome!

[@thebluespatrick3487]

thank you so much engineer

[@GLBProductions]

You're welcome Patrick :)

[@todds5956]

Great refresher. Thank you. Where does one get a Darnley shirt?😊

[@GLBProductions]

You're welcome Todd! I got mine at a trade show, but Danley have an online merch store too.

[@oscarcruz8762]

Thank you very much,good explanation.!!!

[@GLBProductions]

You're welcome!

[@archive3824]

Thank you as always for the great videos.

[@GLBProductions]

You're welcome! I replied to your question on the amplifier DI video, btw.

[@nyinyiphyo5435]

thanks you

[@FirebrandVOCALS]

Always enjoy these* videos 😎✊️

[@GLBProductions]

Thanks for watching!

[@FirebrandVOCALS]

GLB Productions Your most welcome man 👊

[@matthewkitchens5796]

love it u r awsome man ,thanks for the info . keep it up . GOD BLESS U

[@GLBProductions]

Thanks for watching!

[@stumurphy4593]

Hi GLB. Thanks for your informative video. Unfortunately I still can't quite figure my large pro audio system out to patch it and run it correctly - mainly I'd like to check how I power the subs. I'm a pro musician - our band plays a lot of large venues. My sole amp is a Camco Quadro Vortex 3 4-channel amplifier (rated 750w into 4 ohms per channel), and it powers my double NEXO PS8 system (which is 4 x ps8 boxes for the tops, and 4 x LS400 subs - I run two of each of these boxes per side (so 4 tops and 4 bottoms in total). I run the PS8 top boxes in stereo.. 2 per side, so a 4 ohm lode per side out of amp channels B and D in stereo. The individual sub boxes are 6-ohm boxes, so I link two boxes together per side, out of amp channels A and C, so those 4 boxes would be a 3-ohm load per side - per amp channel there, as I have all four amp channels switched to stereo. But I suspect I'm not running the subs as powerfully as I could be, so may not be getting the maximum bottom end out of the amp, but I think the A&C sub channels are being pushed quite hard regardless of the modest output. Can you please tell me how I should patch this particular system to get the absolute MAXIMUM out of the amp for the subs? It's loud, and sounds clean, but I suspect it's capable of much more, if I patch it correctly - would parallel mono for sub channels A & C in this case be better than just running it in stereo with this heavy 3-ohm load per amp channel? I use the original blue analogue NEXO TD Controller for full speaker management, as is Nexo's requirement.

[@GLBProductions]

Hi there Stu, looks like you have a nice rig! Ok let's look at the numbers: You're running the PS8s in stereo, two per channel, which is a 4 ohm load. Your amp does 750 watts into 4 ohms per channel, so each PS8 gets 375 watts, which is within the Nexo spec of 200-500 watts for that box. So far so good. You're running the subs in the same way, which is a 3-ohm load per channel. If you look at the amp manual for stereo mode operation, you'll note that the amp is only rated down to four ohms per channel, so running it the way you have it now is actually not a good idea! Were you aware of this? This is the manual I'm referring to: www.camcoaudio.com/downloads/V3QUM_GB_2004-2007-R2_12-2007_screen.pdf (Look at page 13) This may be why your system seems to lack low end... From what I can see, there is no way for you to power this entire system correctly using the one amplifier that you have, due to the impedance of your subs. My recommendation in this case, based on the limited info that I have, would be for you to run two subs only, one on channel A and one on channel C. This would result in an amp output of 750 watts into 4 ohms, which is almost exactly what Nexo recommend for the LS400. Try this and see how it sounds - it may actually sound better than having all four subs connected!

[@stumurphy4593]

Thanks so much for your knowledgeable reply Bruno! Yes, I did check page 13 of the Camco manual that stated 4 ohm loads/channel. But then, page 14 goes on to say that in parallel mono mode, the parallel mono'd channel can run at 2 ohms. So I thought my 3ohm sub load would be way better off that way than just running in stereo mode? And also, the amp has technology built in that senses underimpedance and subtly shuts the amp down, I think it senses at below 2.66 ohms or somewhere there (that's why I ran them at 3ohms - I thought it would just sneak by, which I guess it did in the end, but barely!). But what do you think? Edit!: I'm awfully sorry Bruno, but one more question just sprang to mind that might be relevant? There are two 3-way channel sensitivity switches on the rear of the Camco amp (for channels A/C, and B/D), that switch between 26db, 32db, and 1.4v. Which should I go with there, because there is also a 3-way sensitivity switch on the back of the blue Nexo TD Controller, and it offers 0db, -6db and -12db settings. I run it on 0db, as -6 and -12 seem so quiet by comparison. So to align it to the amp, should I run the amp on the 26db setting? I believe that corresponds with 0db on the TD unit? And I think 32db equals -6db on the TD.. but no idea what the 1.4v setting is?!

[@GLBProductions]

Hi Stu, given the number of questions you have I strongly suggest that you contact the person who sold you the rig and ask their specific advice. Alternatively contact your local Nexo dealer, they will be the best people to help you. I would still recommend the same thing - try and run the rig with only one sub per side and see how it sounds.

[@stumurphy4593]

Thanks Bruno.

[@KavandaIvan]

It has been great but I have a simple question how to set the frequency knob

[@GLBProductions]

Which specific frequency knob are you referring to?

[@pearlbranding9288]

GLB Productions - Thank you very much. The video was very explanatory. Well done Sir.

[@GLBProductions]

You're welcome, thanks for watching!

[@delfigueroa2365]

Very helpful sir!!many thanks!!

[@GLBProductions]

You're welcome!

[@bambagarobert4875]

Thanx for that info

[@GLBProductions]

You're welcome Robert!

[@nabiswawanyama]

Thanks Awesome

[@GLBProductions]

You're welcome.

[@ZumbaJoeFitness]

excellent！thanks！

[@GLBProductions]

You're welcome!

[@dcamlin]

Awesome vid. Thanks for such a clear explanation!

[@GLBProductions]

You're welcome!

[@miyururan]

Good explain.

[@GLBProductions]

Thanks Miyuru!

[@missakhaladjian]

Brilliant explanation as always! So what i understand is that when using bridge or parallel, we need another amp in case we need to make a stereo config?

[@GLBProductions]

Correct - you would use one amp for left and another one for right.

[@footballvidz6453]

Bro plz..gave explanation for EIA..

[@gabrielgallegos682]

hey man thanks awesome work keep up the great work

[@GLBProductions]

You're welcome Gabriel.

[@RHill79]

Well said thanks

[@GLBProductions]

You're welcome Rob.

[@Carlbooze]

Need to power six 30 W active speakers, along with my DAC amp, my Sub amp, my Active Sub, my 9-band EQ, and my powered TPA 3116. Since I'm stuck with the six active speakers, and the powered subwoofer, I'm desperately trying to find a way to make them work together! And, to add insult to injury, I happened to have two headphone amps to use, but I realize that I'll probably have to use them somewhere else. Can you help me sort this confusion out? By the way, I was drawn to your channel due to the great detail of your videos, but I 'm not sure if I can use your info for this small home setup. Please, I'd appreciate your help!

[@GLBProductions]

Carlton I'm not an expert in home theatre systems, but active speakers are typically easier to make work together because each one is an independent unit and just needs an input signal. I would start from your AV receiver and work out a signal chain for each channel: Left, right, center, left surround, right surround and so on, and then choose a speaker to match. Obviously your left and right speakers should match, as should the corresponding surround speakers, but beyond that it's really about getting a system that works and sounds reasonable. All the best!

[@Carlbooze]

@@GLBProductions Thank you so much for your suggestion.

[@PhilORourke]

excellent

[@HollySylvester]

Wow! What a great tutorial!

[@GLBProductions]

Thanks for watching Holly!

[@Yellowjacket1977]

Excellent. Do you have a video on setting a 31-band eq? In the past, we used a Real-Time Analyzer (RTA) with the little green, yellow and red lights with pink noise and it was so easy. The guy I worked for switched to a scope, and I never understood how to use it. I'm still all analog, not digital. What do you recommend?

[@GLBProductions]

Hi there Cubby 😄 I don't have a video on that topic sorry. I started in live sound in 2001 so have seen the transition from analog to digital, and remember RTAs, pink noise and 31-band EQs very well. They were necessary back in the day due to the technical limitations of loudspeakers, especially in the area where the low and high frequency drivers overlapped. Today, modern speaker systems are much more linear, and a lot of these corrections can be done in the crossover design and/or in the amplifier module, for active systems. The benefit of this is that these systems need very little in the way of corrective EQ if they are deployed correctly, to the point that an old school graphic EQ can actually make the sound worse, especially in the hands of an inexperienced operator. By the way, I struggle to understand scopes and transfer functions too 😅 Whenever it comes to SMAART and that sort of thing I will always work with a system tech who will tune the PA for me, I can thus focus on mixing. So you're not alone 🙂 All the best with your music and KZbin channel!

[@Yellowjacket1977]

@@GLBProductions Thank you so much for your response! I enjoy your videos! Yes, my new FOH speakers (Yamaha DZR 12-D) have EQ built in, so I pretty much let them handle that part. It's much easier!

[@TechSomnath]

Suppose I use active loudspeaker in whole stage like as sub,line array,monitor so then I take the mixer output to speaker but question is that which no of speaker get connect in same signal with any kind of distortion?

[@MONK-7]

Thank you Bruno. Can you answer a question for me because I'm having a discussion regarding impedance for amplifiers and speakers. Speakers of course have eather 16/8/6/4 ohms and so on so therefore does the amplifier have the same impedance or does it just depend on the speaker. I myself have the theory that speakers are made and designed by the load an amplifier is designed to take. Please help! Cheers.

[@GLBProductions]

Older tube/valve amplifiers were designed such that the load impedance needed to be specified, usually by setting a switch on the back panel. Modern solid-state amps, especially those used in pro audio, do not require this - the only limitation is the minimum load impedance which can be connected to each channel, typically 2 or 4 ohms.

[@momargassam9753]

Thats great

[@southernsfinest210]

Can you please tell if you have a video of how you connect what you were explaining on the 3rd diagram? In stereo mode

[@GLBProductions]

Yes look up my video on bridged mono mode.

[@Mus.B.E.]

1st time seeing your channel and was wondering why is this english accent soo soo familiar, did a dig through your about page and you found yourself a sub =D

[@GLBProductions]

Welcome, Mustakim!

[@thomaspick4123]

Also confusedabout Marshall Plexi guitar amps. You would see pictures of Jimi Hendrix amps with a short jumper from one channel to the neighboring channel. What was that about? Almost looked like big power out into line level input? How many volts is line level. How many volts is a phantom powered microphone?

[@GLBProductions]

I'm not an electric guitar player but the idea behind this is to access both normal and bright channels simultaneously so that the tones can be blended together. More info here: www.sweetwater.com/insync/jumpering-marshall-amp-channels/ Professional Line level is +4dBu or 1.228 volts. Phantom power is generally +48 volts DC, although you can get 12 and 24 volt phantom power on some devices.

[@jorgemilian3308]

Thanks for your knowledge ,i have a mackie 808s and have a yamahap5000s powered amp ,i have sp3 peavey speakers, i will uses them for preaching how can i do a better connection to get the best of the systems thanks you

[@GLBProductions]

Hello Jorge could you please be more specific with your question, thank you.

[@jorgemilian3308]

So my question is the powered mackie 808 s and the Yamaha p5000s will be enough to supply enough power for 4 peavey sp3?

[@jorgemilian3308]

Sorry my English is not that good

[@GLBProductions]

I have a video that shows how to calculate this: kzbin.info/www/bejne/omqvaKiBbL2sZtk There are many different variations of the SP3, depending on when yours were made, so make sure that you have the correct power requirements for those. All the best with your preaching!

[@todosniveles9406]

Thanks for the explanation. When you explain using one channel to run two front of house speakers and a sub the term daisy chaining is used. Does this refer to wiring the FOH in parallel?

[@GLBProductions]

Yes that's correct - it's the idea that the output of the first speaker is connected to the input of the second speaker, connecting them in parallel. It also means that no stereo panning is available.

[@todosniveles9406]

Thanks for clarifying.

[@musicotensai]

I have a Yorkville ap4k. It’s in stereo mode. Channel A is for mains. B is supposed to be monitors. The mains are producing sound but monitors are not. If I boost aux out on mixer the expected monitor sound can be heard inside the amp 😂. Am I missing something? Speakers/monitors are passive. If i connect monitors to channel A, they work.

[@GLBProductions]

Try swapping the output connectors, ie connect channel A to the monitors and B to the mains. If the monitors start working and the mains go silent then you know that the problem is not the amp itself.

[@musicotensai]

@@GLBProductions Thanks. I believe I tried this already but I'm stumped after this. Total noob here. Do you have a video for such scenarios?

[@GLBProductions]

Ok, so you tried it and your monitors started working. What exactly do you mean by 'the expected monitor sound can be heard inside the amp'?

[@musicotensai]

@@GLBProductions the ap4k amp has distorted sound coming out of it as a I increase sound on the mixer. Mixer aux 1 out is connected to the amp channel B input. Amp Channel B output connected to monitor via a snake. No sound from monitor but the Yorkville AP4k amp sounds like a small distorted speaker as I raise level of aux 1 on the mixer.

[@GLBProductions]

Ah ok, there is clearly a problem with channel B of your amplifier and it needs to be serviced. There should not be any such sound coming from inside the amplifier itself 😅

[@rickylequin6587]

hi sir, can you make a set-up for 1 power amplifier+mixer+amplifier+equilizer? thank you in advance sir

[@andyoconnormusic]

So with stereo mode in fact functioning as "independent mode", do both channels still need to be connected to a load? For example if I had a an amplifier set to stereo mode, but only needed to connect 1 monitor wedge, would I still need to connect a load to the remaining amplifier output?

[@GLBProductions]

Solid state power amps can be run safely without a load, unlike valve/tube power amps. However I would turn down the level control on the unused channel.

[@OweyiJimmy-cq4vn]

Are all those channels produce good sound?

[@GLBProductions]

Sorry I don't understand your question.

[@malinvis]

Hello! if you were to choose an amplifier only by class, what would you choose between D and H? the amplifier would work like this: 4-5 hours / day, almost every day, but at a low volume. to be even more precise, the amplifier has 2x500 w on 8 ohms in stereo mode and will be used to output a spl of 70-90 db. Thank you!

[@GLBProductions]

You'll need to ask an amplifier designer that question ;) Any well-designed pro audio amplifier should have no trouble with that sort of workload, given correct installation and appropriate airflow for cooling.

[@DjMaster_V]

Helpful video, I just have 1 question though. I have a Hybrid B1600 MK5 Amplifier and x4 Hybrid PLB15 full range speakers(passive), what would be the best mode to pair them all up or correct way to daisy chain them so I don't put much load on the AMP?

[@GLBProductions]

Take a look at this video: kzbin.info/www/bejne/omqvaKiBbL2sZtk

[@DjMaster_V]

@@GLBProductions Thank you for replying , I'll check out the video now

[@britesynth]

thank you very much!

[@GLBProductions]

You're welcome, thanks for watching!

[@johnlewis5774]

Ty for sharing your knowledge. I have a question regarding running a pair of passive subs out of a qsc. There'd nothing on the manual about running subs alone. Should I use one channel and chain the speakers? Or should I use a jumper on the amp and use both speaker outs? And should the amp be set at "full range" or "crossover ch1/ch2". Again the manual does not address this I thank you for any assistance

[@johnlewis5774]

Side note..im NOT bridging. Just trying to figure the best way to run 2 passive subs out of the amp and how it should be set i.e. crossover or full range (the only 2 options the qsc offer)

[@GLBProductions]

Hi there John, which model QSC amp are you using please?

[@johnlewis5774]

Gx7

[@GLBProductions]

With this amp you can actually use either setup above: one sub on each channel at 8 ohms, or both subs daisy-chained together and run off a single channel at 4 ohms. Obviously this will not work if your subs are 4 ohms... The decision will likely depend on your specific setup - the distance between the amp and the subs, whether you have enough speaker cable for two complete runs over that distance etc. The crossover switch should be set to 'fullrange' if you are using an external crossover and/or using the first method. If you are driving both subs off channel 1, you could experiment setting it to the crossover position, which will give you a 100Hz low pass filter - again, unnecessary if you are using an external crossover.

[@ArmandoArmas-mu5zy]

at back of the speaker where to insert the cable is it the input or the output?

[@GLBProductions]

I'm sorry I don't understand your question.

[@georgechandrum]

Hey Bruno. I have 2 types of speakers that are currently use for 2×FOH & 2×Monitor wedges(which are separately for musician & vocalist). Recently I got a 1 sub for my system. Can you give a wiring suggestion for this new routing system?

[@georgechandrum]

Here's my equipment: 1. Peavey PV14 Mixer 2. IVA M-5.0MKII power amp 3. IVA em7.0 power amp 4. Behringer DCX2496 5. FLP NX12 speakers 6. Behringer VS1220F wedges 7. NEXO LS1200 sub

[@GLBProductions]

Hi George I'm afraid that I'm not able to make recommendations without seeing your system in person. You are much better off engaging a local sound reinforcement professional to review your system.

[@NAMbeee]

Hi Bruno, Great Video. Just wanted to know what happens to the impedance of the amplifier channels in Parallel mono mode

[@GLBProductions]

It's identical to the operational impedance when in stereo mode. The channels still operate independently except they are fed a common signal from input A usually.

[@NAMbeee]

+GLB Productions Thank you :) Appreciate it

[@elroypassman8277]

I have a powered mixer with 150 watts per channel output at 4 ohms, what does it mean?

[@elroypassman8277]

Thank you, you're the best

[@GLBProductions]

Take a look at this video, it should help explain: kzbin.info/www/bejne/omqvaKiBbL2sZtk

[@elroypassman8277]

I did take a look and I'm very happy, you are truly one of the best, thank you

[@jonilaw1923]

Very helpful education video. Thanks Bruno. Can a lower power output (RMS) Power amp drives speakers that RMS rated higher than the Power amp? For example, 50W per channel Power amp drives 2 100W speakers.

[@GLBProductions]

Yes you can do that, you just will not get the maximum possible output from your speakers. For music playback, home stereo applications etc this is fine.

[@jonilaw1923]

GLB Productions Ok. Thanks.

[@ahmadtvbangla5919]

Sir , driver unit transformer connection?????🤔🤔🤔

[@GLBProductions]

For that you need an amplifier that can drive 100 volt lines - it's more complicated and you really need to know what you are doing.

[@ahmadtvbangla5919]

@@GLBProductions Sm6 mixer and Um6 mixer difference??????

[@ORIGINALDaveB]

I bought a speakon cable before viewing your video. It's a 6 ft cable with neutrik connectors. One end locks, the other end doesn't. Which end do you suggest goes on the combo amp side and wich end goes on the cabinet side? Why don't both ends lock?

[@GLBProductions]

They should both lock - send me a picture of the cable by email or via FB and I'll take a look.

[@ORIGINALDaveB]

@@GLBProductions I don't have FB, but here is the cable

[@ORIGINALDaveB]

@@GLBProductions it looks like one end is a Neutrik NL4 (per your video) and the other is an NL2. I ordered another NL4 connector and I will remove the NL2 with an NL4 co that both ends lock. Strange that they did that.

[@GLBProductions]

All genuine Neutrik Speakon connectors lock, which is why I asked you to send me a picture of the cable. The old NL2FCs do not have a metal latch but they still lock using a spring-loaded ring on the connector with plastic locking tabs.

[@ORIGINALDaveB]

@@GLBProductions i must correct myself. When I ordered the 6 ft cable the picture looked like the NL2 connector didn't have the metal locking tab. When it arrived yesterday it did. I tested the cable with the recomended cabinet and it worked. The combo amp has 4 pirana speakers and the cabinet does too. When coupled it is 8 speakers (at 4 ohms?).

[@318benzo4]

@15:10 you stated in Bridge Mode to run a full signal to the amp. What if I'm bridging the amp to drive a sub and need a LPF signal ran to the amp because the passive sub doesn't have an internal optimized LPF?

[@GLBProductions]

You need to derive the low passed signal from somewhere - typically an external active crossover or signal processor. Some amps have a crossover function built in.

[@albertopacheco9784]

Its better a p.a system than an dedicated amp for a bass guitar?

[@GLBProductions]

It depends on the PA system 😉 Some PA systems can handle bass guitar no problem, others cannot.

[@richardwatkins9831]

I have two JBL tr225 I was wondering if the plugs on the back are both inputs

[@GLBProductions]

On that model the 1/4" sockets are wired in parallel - either one can be used as an input, the other one can be left unused or used to daisy chain the signal to another speaker. More info here: www.jblproservice.com/pdf/TR-Series/TR225.pdf

[@richardwatkins9831]

@@GLBProductions thank you very much I finely got everything working you have been very helpful thanks alot

[@GLBProductions]

That's great news Richard 😄👍🏻

[@pearlbranding9288]

Please Sir a Short video on Speaker Recone/Repair will be appreciated or how to Solder/lead a correct speaker and microphones cables. Thank you in Advance.

[@GLBProductions]

Sure, thanks for the suggestions!

[@senzomngcobo7314]

I have a 6 channels powered mixer...when ever I connect it to a power amplifier the sound drops,should I change the modes on power amp or is there something wrong am I doing? Can someone help me,I need boost the sound on the powered mixer

[@GLBProductions]

Which model powered mixer are you using, and what do you mean when you say 'the sound drops'?

[@nicoleleah9734]

Sir. Can you make a video on how to use graphic equalizers? A big Thanks in advance..

[@denisbreda]

I can help you if you need :)

[@Hasifsafwan98]

subwoofer 12inch can be connect direct to powermixer pmp4000 behringer or not? need to use active sub or passive sub?

[@sapsecurity4075]

Hi Bruno, Excellent video. I need your expertise on this since I am not sure. I am about to set up an 7.2 AV receiver having rated RMS 120W per channel to five speakers. Two front speakers are rated 150W per channel, the front rated 100W/channel, and two rear speakers rated 100W per channel. Do you think the receiver could handle speaker power ? AV receiver : Yamaha RX-A1060 (RMS 120w) Two front speakers : Monitor Bronze 6 (RMS 150w) Center : Bronze center (RMS 100w) Two rear speakers : Monitor Bronze 2 (100w) Thank you very much for your advice

[@GLBProductions]

This is fine for home theatre use because you are rarely playing at the extreme levels that you get in live sound reinforcement.

[@KB1285]

Hello Bruno can you run two full range speakers in bridge mode with a crossover such as the peavey pr15 or the Jbl prx415

[@GLBProductions]

You can run two fullrange speakers in bridge mode WITHOUT a crossover, just daisy-chain them together :)

[@KB1285]

GLB Productions but if I wanted to put a sub on another amp then I would use a crossover that what I was trying to say to get my low frequencies

[@GLBProductions]

That's right.

[@KB1285]

I was told that you never should bridge your tops that for that info great tutorial

[@GLBProductions]

The problem with bridging the tops is that you can't have them in stereo. Apart from that it's ok.

[@tisounds4257]

Please tell me what does ys processing do in Yamaha amplifier?

[@GLBProductions]

It applies specific audio processing designed for Yamaha Club Series loudspeakers.

[@MohanRaj-ju6ex]

Sir one simple doubt can we connect HF in left channel and LF in right channel in single amplifier??

[@GLBProductions]

Yes you can do that on some amps which have an internal crossover.

[@DewJake]

How can I get all 800 watts to come out of 1 channel of my amp and go to my both of my 400 watt speakers?

[@GLBProductions]

Try bridge mode: kzbin.info/www/bejne/bomvg6mlh8mMjKc

[@tenzinglhundup8194]

If I'm using 2000wt power amp in Parallel mode then how many speaker I have to connect in both channel ( a )500wt( b )500wt (or) ( a )1000wt( b )1000wt

[@salvadorandal9009]

Sir, I would like to know the proper way of building audio cables and it's purpose like TRS to XLR. Thanks

[@GLBProductions]

This video will get you up to speed on the different types of cables and connectors: kzbin.info/www/bejne/d5-4Y2qEaKifqdk

[@aryakodestudios]

Hey Bruno always admire your pro approach to sound engineering. I am currently building a sound system (the name Jamaicans use for big PA systems). I have some Behringer inukes 12000 (2-xlr/1/4 inputs and regular channel A/B Speakon outputs) How can I daisy chain these amps? Thanks!

[@GLBProductions]

Hi Arya, we also call them sound systems in Singapore 😄 On that amplifier you cannot daisy chain the channels because you have only a single input connector for each one - you will need to use some sort of external XLR splitter system. Definitely not a good design choice by Behringer!

[@aryakodestudios]

GLB Productions Thanks so much for your reply. And I do hope Singapore is managing with this Covid-19 situation. So, sound system it is 😀 I was thinking the same thing, but of course I have to speaker with the master at this. Listen Bruno! I would love to consul with you on a pro level. How can we make that happen? Thanks! And be safe 🙏🏽

[@GLBProductions]

Thanks, we are managing so far - Singapore is very small so we are able to make changes quickly to deal with the situation 😄 You can contact me via Facebook or email if you would like to have a more involved discussion - details are in the description of the video.

[@markkusyrjala7919]

good stuff. I'm wondering how to connect a t.mix pm400 power-amp to big Peavey Eurosys 3 cabinets or why am i not getting any sound? dont even have a manual :(

[@GLBProductions]

This video may be of some help: kzbin.info/www/bejne/hKK3on1qr7R9gLc

[@markkusyrjala7919]

+GLB Productions thanks a lot. very nice of you!!

[@barttoth1127]

How do you bridge an amplifier that already has bridged outputs like a class 'D" amplifier?

[@GLBProductions]

Sorry I don't know the answer to that 😄 However I do know that the operational procedure for bridging power amplifiers is not dependent on their topology.

[@stallion63m35]

Can yamaha p3500s be used to power home theater passive subwoofers?

[@GLBProductions]

Yes it can.

[@stallion63m35]

@@GLBProductions Hi. Thanks for the reply. I just bought this Yamaha power amp to power a passive sub.It's connected to my Denon avr's subwoofer output,but the yamaha power amp is not receiving a signal from the denon avr. Someone told me it's b'cos the denon's output gain voltage is too low to activate the yamaha amp. Is that true. Btw,The subwoofer vol on the denon avr is already set to max 12db. Appreciate your advice.

[@GLBProductions]

No - there is no such 'activation threshold'. It could be that the level is so low that you cannot hear it. More likely there is a cabling issue - if the receiver is RCA out then best to use an RCA to 1/4" to connect to the Yamaha amplifier. Also ensure that the receiver's subwoofer output is enabled, if such a setting exists.

[@stallion63m35]

@@GLBProductions I'm not sure if it's called a 'acrivation threshold' but I believe a signal input 'sensitivity' of 1.4v 4dbu is needed for pro amps to operate. The cable used is rca to xlr. Pin 2 hot,pin 1 ground and pin 3 not connected.Both the Mains and Subwoofer is set to ON on the avr.Not sure what else could be the problem.

[@GLBProductions]

Ah yes - that is actually +4dBu, which is equivalent to 1.23 volts RMS. This is simply the nominal input level for these amplifiers - they CAN be driven by a signal much lower than that, you just won't get full power out of the amplifier. Having said that, your Denon should be able to easily output this sort of level, especially if the output level is set to +12dB. I suggest bringing the entire combination (AV receiver, amp, sub and all cables) to the person who sold you the amplifier and getting their help to troubleshoot the system. In my experience interfacing hifi and pro audio gear can be tricky and it's best to get expert help.

[@joysimon5630]

Sir, I have a doubt. What's the purpose of sensitivity switch present in the backside of amplifier?

[@GLBProductions]

It adjusts the input sensitivity of the amplifier, ie how much input signal is required for full power output.

[@appleheadq4826]

Are you able to help me hook up my Samson servo 600 x2 as bi-amp and bi-wired pls?

[@GLBProductions]

I'm afraid that I am not able to do this.

[@buriedatsea23]

What is exactly the sustained power?

[@GLBProductions]

Each manufacturer has its own definition of sustained power, but generally it is the amplifier's power delivery into a specified load over a specified period of time given a specified input signal.

[@thomaspick4123]

Bridge, proprietary wiring, raw wires look like a cheap home stereo. Speakon bridge mode- ouch! Watch out, Speakon wires must be rewired. Normal Speakon cables- Scott Grove recommends 12 gage, thick wires to handle the amperage. Not properly matched systems where a person uses a guitar cable to run power through, the vocals cut out because not enough wattage can go to the speaker at higher power outputs and higher volume settings. One of your back shots (Yamaha?) had a choice of guitar cable (I associate with line level, low voltage to active speakers) or Speakon connection (I associate Speakon with high voltage/amperage to passive speakers). I am also afraid of getting electrocuted. Example: guitar player performing and lips touch microphone singing = electric shock. A girl singer was electrocuted to death in summer 2017.

[@GLBProductions]

Quarter inch plugs were used for speaker level connections for many years before being replaced by Speakon. And yes plenty of people have incorrectly used co-axial guitar cable instead of unshielded twisted pair speaker cable!

[@iboysantos]

is it okey to connect two subwoofer in bridged mode? I mean, output of subwoofer 1 connected in input of subwoofer 2?

[@GLBProductions]

It depends on your amplifier - combining two 8-ohm subs in this way will result in a load of 4 ohms. You need to check carefully to see that your amp can handle a load of 4 ohms in bridged mode.

[@anilkumarreddy2841]

A small question, is it ok to connect a single 100watts speaker to a 100watts(50+50)amp to a single channel?

[@GLBProductions]

Yes it's fine, just remember that you will not be getting the maximum possible volume from the speaker.

[@tomaszmichewicz7867]

Hello mate, need your help please. I’m about to add power amp to my home cinema receiver. Do I have to run calibration again, or just to leave it as it was set up on first time ??

[@weijiantan6534]

Hi, if i were to run 2 passive speakers and 2 active subwoofers. What mode is recommended?

[@GLBProductions]

How do you plan to configure your system?

[@weijiantan6534]

@@GLBProductions. Mine is through PC connect to USB DAC. USB DAC connect to Power Amp with XLR cable.

[@GLBProductions]

In this case stereo mode would be the best choice. But you still need to work out how to route the signal to the active subs. Remember that you CANNOT connect the speaker level output of the power amplifier to the input of the subs.

[@weijiantan6534]

@@GLBProductionsThanks. Is it ok if I connect the XLR link port of the CLA-200 to the active subwoofer XLR source link?

[@GLBProductions]

Yes - check out my video on working with active subs for more suggestions on how to configure active subs with passive speakers: kzbin.info/www/bejne/a2WbeI13e5uZg7s

[@frankjansz8176]

I got a NAD C 272 Power Amp . This Amp has only got a 230 Volt 2 Pin Input Power Chord . How can I connect A Ground Earth To this Amp

[@GLBProductions]

There is usually a grounding lug, screw or bolt somewhere on the amplifier - contact the manufacturer for specific details.

[@willardjustus2460]

im wanting to run 2 seperate power amps .one for mains and one for monitors but i dont understand how to connect them to the mixer any help would be appreciated.

[@GLBProductions]

Watch my video on how to connect a power amplifier to passive speakers: kzbin.info/www/bejne/hKK3on1qr7R9gLc The power amp for the monitors should be connected to the mixer's aux output.

[@williampercival7662]

My power amp also has a limiter switch on the back, do I turn it on or do I keep it off. William Percival New Zealand Gardenia Band 🇨🇰 Kia Orana

[@GLBProductions]

I'd leave it on all the time.

[@williampercival7662]

Thank you GLB productions.

[@williampercival7662]

My power amp has a limiter switch on the back. Do I keep it on or off . W Percival from New Zealand 🇳🇿 Gardenia🌺 Band

[@GLBProductions]

I would keep it on.

[@mariojr.amperpacana598]

Hi there,,,please teach me to set up the 4 input and 8 output DPS into 2 input and 8 output,,, so 1 input and 4 output per channel