How to test an amp ( amplifier bench test )

I show you how I test an amp I just got used, So you can do it yourself with some basic tools.

[@nabed4t]

"On all iPhones and most Android phones they all have this 3.5mm jack..." oh, simpler times in 2013.

[@legofeak12]

Legend has it he still has this iPhone in 2019

[@nightfury20101]

You need an audio jack adapter for iPhone

[@stevendemayo3631]

@@nightfury20101 Yep. We know

[@rjdatdude23]

TheRealTruman 😭

[@Lesscoelectronics]

right!?

[@LorenzoBlanco]

right on brother you made it look so easy. i was useing a multi tester but it takes to damb long after seeing your video to hell with the multi tester

[@doobedi]

Wish i had tools and equipments the way you had to test the amp.All i have is multimeter

[@ceedeegutierrez]

I'ma go test my amp right now. Good info thanks!

[@cody6.6max]

So for me to test my amp in my car just plug my phone in with that jack play the mousin through my phone only not through the head unit and the subs will hit if the amp is good ?

[@warthhoh]

Is it risky to buy an amp that turns on but there's no audio coming on?

[@nvkulk]

I have power 12-14 ? to the amp but the power light doesn’t turn on Ground is good . Is the amp the issue

[@sarikaoad4650]

Is there any app that you could download and measure neighbours woofers vibration. Pls help

[@MyBlowncobra]

I love that model...

[@prolifictroll9387]

Would a old car charger work if it's only rated at 2 amp output

[@goaguilera86]

Do you need to run a fuse on the power cable if its only going to be tested? Its a jl hd 900/5 no on board fuses, going to be tested indoors

[@tluva1020]

Here in Jan 2023. About to test an old skool Kenwood KAC-628

[@pryme2013]

Hi, I know this video is old but I have a old high end amplifier(audison vrx) and last time I had it installed was 2012 and one channel stopped working. I opened it up and didn't see anything burnt or "off" looking. I've read about a spray called deoxit, can this be sprayed on anything inside the amp? Or into connection points? Wondering if that could help? Otherwise maybe try your set up to figure it out? Any ideas?

[@neilufe]

I have a dumb question - I have an amp and my positive and negative for speaker connection erased how do I know which is positive output it negative for speaker

[@Lesscoelectronics]

do a continuity check from the amp chassis and either wire, one will buzz out, the ground..

[@DeezNeez01]

Good stuff, brotha!

[@akamaster09]

i have 14 volts over my fuse but only 2.1 at the amplifier power terminal, any help?

[@Lesscoelectronics]

How can I help

[@OmertaDesign]

Thanks for the video it was informative.

[@LOWPR0FiL3]

does it matter how many amps the bench power supply to test the amp ? amplifer is like 40 Amps and thinking 20 amp bench supply will work otherwise the 40 amps is worth alot

[@javybusa]

Hey bud thanks for all you videos helped me alot. I have a question on buzzing in my speakers im running a 4 channel amp and checked everything from grounds to power and made sure my speakers were not touching metal. So the buzzing is not engine in fact it buzzes with the car not running i ever ran other rca just in case and still buzzes then i pulled all rcas and still buzzed. What am i doing wrong? Please help! Thank you!

[@Lesscoelectronics]

check the impedance on your grounds, if all else fails there's always ground loop isolators...

[@jaycee5779]

Multimeter never used in this video

[@jerryunknown3638]

You need to get fancy

[@Kla2024-s5t]

I am getting blown fuses every time. I tested all my connections and all just over 12 volts. Have a good ground and remote. Could it be the Amp? It’s pretty old.

[@Lesscoelectronics]

sounds like a dead short

[@dxdvilla7650]

Were you able to find the problem?

[@jaredortiz2115]

Hey les I have a pair of Memphis pr components the recommended power is 70 watts RMS I have a hifonics amp that puts out 75 watts RMS in other words would I blow my door speakers if they're getting those extra 5 watt RMS? I've never connected my amp to them bc I'm scared of blowing them being as they cost me 140 per set thanks in advance

[@Lesscoelectronics]

My advice is this, adjust the max gain output on your amp to match the speakers just before they start to sound distorted, the speaker will tell you when it's had enough. Don't go my numbers, go by what you hear..

[@michaelpalmisano6788]

Any way to test inputs on a factory amp? 07 cts with Bose system.. I have the gmos-10 interface and the warning chimes work but no audio from any of the sources FM , CD Aux etc.. I tested outputs from amp to speakers with tone generator and all checks out.. only thing I can think of is either my interface is defected, or the amp inputs are shot.. any suggestions?

[@rmblwgn]

Probably your head unit right

[@radiospank]

Nice 👍

[@Lesscoelectronics]

Thanks ✌

[@12Randy21]

I've got everything hooked and have volume but it is very low. volume on phone is maxed. setting seem to be maxed. any suggestions?

[@chrishickey5605]

Are you still in business for repairs? I’ve got a PPI A404 4 channel Amplifier. It has blown fuse. I’ve opened as I’m not worried about warranty since it’s from the early 90s. I notice nothing burnt or disconnected. Please advise

[@coopergt500twin5]

Look for cracked power connectors they look like tubes if there cracked there not keeping power and if it’s blown replace them copper feeders

[@thecanamriderworkinprogres8717]

Where u do get your ground?

[@Lesscoelectronics]

I get it from the power supply Im using.

[@k300zx]

I cant get my subs working again. One day they stopped working. I'm getting 12volts at the amp, then with the key ON I'm getting about 10.7V..werid?

[@zavaroudikos1]

Hello, I ahve a set in my car. Whenever I turn it on no sound comes out and the Amp heats up. But heats up a lot. After that I stop it. My lights work ok. Red and then Green normally. Please help.

[@Lesscoelectronics]

I'd have that amp tested by a professional. There are a lot of components in an amplifier that can go wrong.

[@zavaroudikos1]

Lessco Electronics Hello, I did some searching in my amp and I discovered that what burns is 2 tranzistors named c 4467 and A 1694 which are next to each other. I have no idea... :(

[@jaycool5978]

To properly test an amp one has to test the output voltage and current. Use both to workout if its has the correct impedance and wattage. Didn't see this to be fair, which should of been one of the first things.

[@jonathangaray7794]

I was hoping this video would show how to get those numbers through bench test. Not just if the amp is in working condition. Would you be able to guide me on how to get wattage with a multimeter?

[@ashrafabdulla391]

Dear I have pioneer AVH-295BT ,JEC1200w amplifier 5cha.. and Alpine subwoofer 1500w so I can connect power supply ( Silver stone)700w 12V 54A please help me

[@ashrafabdulla391]

Please reply

[@535382]

wow! awesome man! I just struggling how to test my car amp....

[@ibiza456]

amplifier emits sound when low on ikuwn what the problem ?

[@jrounds09]

what if my speaker output is not pushing out sound how could I check n repair

[@Lesscoelectronics]

you most likely need to test the power ic chips inside the amplifier

[@drewbryant3489]

"pwopully"

[@bobsprecher1273]

haha I was like did he just say "pwopully"? Ok wasn't just me. Too funny.

[@DavidPigbody]

You mean "properwy"

[@moikkis8114]

Can you Link power subly what you use

[@ginoizaguirre4185]

This is big folks! 5 P'S HUH

[@superkari28]

are you using AC 12volts charger that you connect to your ampflier?

[@Lesscoelectronics]

Yes, I use DC power supply

[@superkari28]

can you post another video again that i can see the clear demo from dc to amp ty btw i like it

[@zuze9112]

Hi man! I have problem. Amp has only 1 light and its red. and its not turning on. (light) I tested + it recives 12.8v(amp) I tested ground it has . Remote took from + or power. RCA cabels are good(working). Any ideas ?

[@Lesscoelectronics]

***** sounds like you need to buy an amp

[@zuze9112]

Lessco Electronics ok

[@Mr_BUSINESS_24_7]

But does this fully test the amp under heavier load ? I can see it's amplifying and no noticable noise. But is it amplifying to spec ?

[@Pvmanne]

Obviously not

[@mikewillliams7044]

output wattage doesn't appear to have been tested

[@GeorgeLiquor]

What did you connect the remote wire to?

[@Lesscoelectronics]

+brotherbosco I tied it in with the +12v power wire to my power supply there on the work bench.

[@0SimpleSam]

Can you run an amp and subs off this? say 1000w rms amp to 2 10" subs

[@marc4life10]

10 years to finally get to the point

[@Lesscoelectronics]

its a 7 minute video dude

[@mistymyers4768]

I did the video is was fine I put it back in car no speaker s or RCA's hooked up and still no green light

[@ANDREASRIAL]

Very good vídeo, and simple. Thanks

[@paulkris8339]

What about grounding it.

[@Lesscoelectronics]

I showed that at 3:05 in the timeline.

[@mistymyers4768]

I took amp out car did the video and it worked but when I put. I t back in car it still did not work

[@GOODFELLA-uk6rz]

12g power ground comon

[@GOODFELLA-uk6rz]

At least some 4g lol

[@Spikes13100]

I just got a new amp and connected all my power and rem and ground and when I turn it on the red light turns on

[@edperez1206]

Bad ass

[@destinycoleman9578]

Prapooly

[@nologic8212]

Lmao

[@tylerhamilton5040]

you should be slapped for cropping the video with these black bars on all sides

[@raulfalcon4031]

The worse u talk to much

[@robpeters5204]

This was pitiful. You never power up an amp that you know nothing about until you take the cover off and do a quick visual of the parts and probe some of the internals with your multimeter before you power up with no problems. By powering it up like that , you could have done a lot of damage to it. Never trust a second hand amp until you inspect it first.

[@Lesscoelectronics]

I was doing a simple bench test here, Bot a full on circuit board operation!

[@rmblwgn]

Im no lowbrow but seriously if an amp is gonna explode from meeting at 12 and then ground then you should be going and getting your money back not attempting a circuitboard repair. most of us ,even the seasoned, are not electrical engineers. I have tested 15 used amps in my short lifetime in this method and every single one has turned on

[@cameltoast]

@@rmblwgn What is this guy even talking about?! "Never power on a used TV unless you take it apart and probe the internals!" Are people booby trapping Amps?? WTF It's car audio, not rocket appliances.