Thanks Mr. D'Amore for the quality information. Always good to hear it from a quality engineer rather than from someone who thinks they know what they are talking about. Love all the new product you are developing and can't wait to see more.
@MuffinMammoth12 жыл бұрын
Very informative. I didn't even know there were two types of RCAs.
@chrisdemchalk34918 жыл бұрын
Very helpful- I bought a new differential preamp and amp but kept coaxial cables and couldn't explain the noise that I created. Eventually went xlr but wish I saw this video prior. In the real end figured that it was caused by halogen sconces emitting noise to the room even on separate electrical drops.
@wal12 жыл бұрын
Audio school w/Tony D! Great vid, thanks for sharing your knowledge!
@dwgwnr19692 жыл бұрын
Big D wiz..I'm outta heeeeerrr
@georgeanastasopoulos58655 жыл бұрын
A very good, informational video, and thorough lecture on the two main signal cables, DAmoreEngineering. Thumbs up. The 2 methodologies are explained well. Therefore, we are not going to make mistakes based on connectivity to amplifiers for our hi fi audio systems.
@TonyInvents5 жыл бұрын
Thank you George
@georgeanastasopoulos58655 жыл бұрын
Your welcomed, @@TonyInvents
@robertgremillion616911 жыл бұрын
Tony, im a EE in the industrisl industry. I never really had a professional opportunity to work in the Ee field. On the other hand, I have always love the audio end as a hobby. Recently I have embarked into xar audio. I have watched your videos and it rekindled my love of it. I have applied it to my car design and I have excellect car tunes. Thank You. Keep up the instructional videos.
@TonyInvents6 жыл бұрын
Thanks a bunch Robert
@als10239 жыл бұрын
Thank you for explaining this, very helpful as I'm starting to make my own RCA connections.
@LTVoyager3 жыл бұрын
Excellent presentation. Simple, but effective. You might consider a discussion on UTP vs. STP and if STP how to properly connect the shield.
@trevorb912 жыл бұрын
Wow.. I have never heard of this or even heard anyone talk about this.. People need to know this information..Thank you!
@johnchase85106 жыл бұрын
For all the folks hemmimg and hawing over balanced XLR and RCA not being able to carry a balanced signal... An RCA can carry a balanced signal, if it uses a twisted pair wire. The cable assembly will simply be unshielded. We often wire studio installs with telescoping shields, where the shield (pin 1) is disconnected at the input of each device. this drains static and RF back to the Chassis Ground in only one direction, terminating to a common ground bus. This avoids ground loops. The shield in a balanced audio system carries no signal... At least we hope not!
@DAmoreEngineering8 ай бұрын
Thank you
@Technotranceism3 жыл бұрын
Great video on a subject that nobody seems to ever explain, and is actually important to know.
@RobWhittlestone4 жыл бұрын
In my experience, it is extremely rare nowadays to use RCA-style for DI signals. Maybe that 's why this info is not common in the industry, These days the industry convention dictates XLR cables for DI. The 3 pins of XLR are signal+, signal- and shield. For example, my CD player has both outputs. All the best, Rob
@RobotUnderground2 жыл бұрын
Yes, some car audio companies would use balanced signal with two RCA's. But that's not what Tony Bologna is describing here.
@onesikm3 Жыл бұрын
@@RobotUndergroundalways making me hungry man 😂😋
@chuckbangers25902 жыл бұрын
Thanks. Spent all day trying to figure out why this Monster cable I just cut open had red/white wires instead of a single signal wire. Now I get it.
@amitsonwane1287 Жыл бұрын
Very well explained in very simple words,thank You
@thirstquencher32034 жыл бұрын
Wow that's some AWESOME info man!! I know this is old but this is however NEVER mentioned anymore lol. I'm a noob and I am glad I found this for my first SQL build!! 👏🏼👏🏼👌👌💪💪🔥
@ericpham78713 жыл бұрын
Great lesson. Wonderfully simple and eye openings. Thanks
@DAmoreEngineering12 жыл бұрын
If the head unit has SE outputs and the amplifier has SE inputs = coax cable If the head unit has SE outputs and the amplifier has Diff inputs = twisted pair If the head unit has Diff outputs and the amplifier has Diff inputs = twister pair If the head unit has Diff outputs and the amplifier has SE inputs = bad no matter what as you will shorting out half of the head unit's outputs. In this case you would need an amplifier with Diff inputs or a converter to convert the head unit's outputs to SE
@isettech6 жыл бұрын
DAmoreEngineering, Sorry for the late reply. Just saw this. Most head units with Diff outputs has a current limiting resistor so when it connected to a grounded input, there is no harm done. This is done for compatibility. It is true the level is then down 6db which is the proper level for most unbalanced inputs.
@ArlowFarrell Жыл бұрын
Any chance you know what it would be considered if I'm going from an IPhone Lightening connector to RCA converter back to a BOSS car amplifier (pf1800)?
@djhlsmusic11 жыл бұрын
The only problem is that nobody lists what kind of RCA input or output they have on their headunit or amplifier.
@DAmoreEngineering11 жыл бұрын
Take an ohm meter (DMM) and check the resistance from the battery ground connection on amplifier to the RCA outer ring on amplifier (with everything unplugged from amplifier). If you have less than 100 ohms it is a single-ended input.
@djhlsmusic11 жыл бұрын
DAmoreEngineering Wow, thanks for the reply! I know you guys explained the same thing in the video, but for some reason I feel that this explanation is more solid. On an unrelated note, I had always known about your company from Steve Meade's videos, but now once I figure out which type of RCA I need I'll most likely end up buying from you. Keep up the awesome work guys, this type of potential customer relations and not keeping this information hidden and secret like everyone else really shows what kind of a company you are.
@astroporpoise78029 жыл бұрын
+DAmoreEngineering What exactly is a battery ground connection on an amplifier? Chassis ground won't work? Thanks for your time.
@djhlsmusic9 жыл бұрын
lowellaby You have a positive and ground connection on any amplifier that runs on DC. The "battery ground connection" is the big ground connection for which you hook up your main ground wire to.
@TonyInvents6 жыл бұрын
@LD Blake I have disputed this topic in these comments many times. You do not need a ground or shield wire to send a differential signal.
@MyBigJune10 жыл бұрын
Thank you very much. This was very helpful. Its funny how you mentioned that the Industries forgot about that technology cuz yeah this is the first time I've ever heard about it. Thanks again
@spankavision111 жыл бұрын
Good info. This information definitely was dropped from mainstream industry. Glad to have people like you to bring into light.
@nicholasperez841810 жыл бұрын
Can you post a video on How to determine if a amp is a single ended or differential?
@derbigpr5009 жыл бұрын
+Nikko Civic Open the manual and read it.
@congi11 жыл бұрын
Very clear and informative. Please make more this kind of videos!
@corywilliams136911 жыл бұрын
I have never heard of this! One thing I don't understand, the majority of RCA cables marketed for automotive amplifiers seem to be twisted pair. ALL of Rockford Fostgagte's cables are twisted pair, so does that mean they are DI?
@WhitentonMike12 жыл бұрын
@DAmoreEngineering, Great explanation. Tony, can you also discuss RCA outputs in relation to what you discussed about RCA inputs? Thanks.
@skipsterz3 жыл бұрын
Cool. Thank you so much for this. I’m trying to add a phono preamp signal to a b&k avr505 receiver but it has to be a 15’ cable for proper placement of the turntable without drastically altering the setup. I tested the turntable signal with a shorter standard RCA cable (6.6’ Prosolutions Blue Soft analog rca) and it worked great. The new long cable creates low level static/feedback/white noise through the speakers with one end just plugged into the receiver inputs. I believe the new cable is a center lead, shielded coax. This maybe my issue.
@Asdfkalsdf9 жыл бұрын
I was so waiting for him to write on the wall on accident.
@drm99792 жыл бұрын
I hope I am understanding but what if head unit is differential and amp is single ended?
@ernestot1312 жыл бұрын
Really great information, just a small suggestion though. If you put this comment in the description that would be great for later use in case it is not on top when someone tries to go back to see this video. Thanks for the awesome information!
@HyperactiveNeuron3 жыл бұрын
Nice refresher course. Thanks!
@MickeyMishra4 жыл бұрын
Mr Damore, are you able to show us how one sounds compared to the other if you use the wrong one? I know you are busy, but I really would appreciate it! Or maybe anyone else has a link to a video like that? Thank you! -iMickey503-PDX
@BimmerFix2 жыл бұрын
This video needs to spread!
@KGrasso89 Жыл бұрын
I've been looking for a decent explanation on RCAs and how to wire them up for different scenarios for awhile. Although this isn't exactly that Tony's explanation combined with knowledge I already learned just turned the light bulb on in my head! Lol
@BWWGL95 жыл бұрын
So the Signal is coming from a what high end CD player, going into a. high end Amplifier? What Audio Equipment has a DIFFERENTIAL OUTPUT? Examples?
@Technotranceism3 жыл бұрын
Testing both of my amplifiers, a 4 channel Pioneer and a mono Kicker, I got roughly 17k ohms on the Pioneer, and roughly 6-30m ohms on the Kicker. The Kicker amplifier specifies that it's a differential model, while the Pioneer doesn't mention anything about the type of input it uses. So I am going to assume that the Pioneer is a single ended based off of the lower resistance shown vs the known differential resistance shown on the Kicker. I hope I am correct in my assumption!
@mike.thomas11 жыл бұрын
So, what is Kimber PBJ? It looks like twisted pair (braided, actually). No shield. But it's not called out as specifically single-ended or differential. It sounds the same as my Blue Jeans LC-1. I guess I always assumed that all RCA cable is single-ended.
@xaytana10 жыл бұрын
Twisted or braided will be differential, shielded will be single or coaxial.
@murdamechanik2 жыл бұрын
Nice video now where can I find some single ended rca cables?
@stubsstubs2 жыл бұрын
Planet waves do some nice ones
@AuroraColoradoUSA4 жыл бұрын
Didn't get how the noise is subtracted from the twisted-pair line...
@durdysauwf4 жыл бұрын
I believe it works on the principle of phase cancellation. Same concept as extracting acapellas from music
@IliyaOsnovikov5 жыл бұрын
I doubt that amps with differential inputs are made with RCA jacks instead of XLRs. That would be kind of dumb.
@dannybourne_ Жыл бұрын
excellent explanation, thank you very much.
@adamwatkins7610 жыл бұрын
Here is a good question. What is the source is different from the amplifier?
@v2a6y55 жыл бұрын
What???.... So what Im getting is some gear basically has noise reduction apparently built in to but could possibly not be used with coaxials because of some extra shielding for noise reduction? Really? Is it because like noise reduction wires plus noise reduction (whatever you said in the amp) equals just no noise? Or is there more of a difference then just shielding between a coaxial and twisted cable?
@BKKLB4 ай бұрын
What about if the amplifier has a feedback loop from the negative input to the output?
@dwdrums82812 жыл бұрын
Great info Tony!
@tivanov5 Жыл бұрын
How to understand which amlifire what kind of type is ? I checked several manuals during the video and did not get any information.
@sIGHTcs7 жыл бұрын
I did not experience any difference in quality or performance on my Audison LRX 1.1k with cheap and expensive RCA cables, tried both of these types as well. Marketing crap.
@peterplague4 жыл бұрын
The issue with Differential Input Cable doesn't surprise me. Monster Cable had manufactured these since the 1990's with Interlink 300 & 400 Series. There are White Stickers with Arrows denoting the Signal Flow which plugs into the source.
@karelbitter80405 жыл бұрын
Hello i have a weird problem. I have 3 Jvc ks ax6500 and they all work. And after measuring the positive and negative input to ground the value is 10Kohm on all 4 channels But from 1 rca negative to the other 3 rca negative it's 0 ohms, is this a problem?
@shakeelfaris76235 жыл бұрын
You may have had experience with this but when running RCA cables close to cabling for light clusters induces noise, for example in my case the loom is down the left hand side of an E90 and following the factory loom which are basically the cables going to the light cluster down the left hand side down to where the factory amplifier normally is, when you put your foot on the brake static noise can be heard. I want to keep my RCA run tidy with the factory cabling but have found it to be problematic in that it picks up EMI whenever I put my foot on the brake. I have verified this when disconnecting the plug that runs to the rear light cluster and the noise is no longer there. The cabling is the 6 channel Stinger 4000 series. I have tried other cables but to no avail. Running it down the centre console works better but I have found it to be untidy for cable management. The headunit is an aftermarket 80prs, so it’s a straight RCA run from the headunit to the amp. The amplifier is a class D five channel JBL GTR 7535.
@raymondchan35874 жыл бұрын
To be more understandable, differential input means balanced type cable, more often come in XLR form (Usually Starquad structure). Single ended not necessarily in coaxial, but more often in RCA type. Unbalanced RCA may consist 2 or more cores of wire in TRS cable.
@leonpiper693 жыл бұрын
This probably explains why I had noise I could never find and I was running Stinger 4000 rca from my Audio Control LC2i to my amps. Probably needed regular RCAs and not twisted pairs and I was a victim of just thinking they were better newer technology.
@atmosphericpressure35604 жыл бұрын
Tony, does this work for speaker wire too? Happy New Year!
@icarusrising7284 жыл бұрын
Mind Blown.... I really thought RCA's only differed in quality of the material and marketing :)
@Atum_Ra3 жыл бұрын
If it’s twisted pair do they usually list that somewhere on the rescue we it would you always have to probe the RCA jack?
@cp32x4 жыл бұрын
Great video. I almost understand. Quick question: Why does the noise cancel out yet the out of phase signal somehow gets back in phase and doubles in intensity? Thanks!!
@VndNvwYvvSvv4 жыл бұрын
He does show this. The phases are opposite from the signal source and one gets subtracted. When you subtract a negativie, it adds. 10 - (-10) = 20. This basically doubles the amplitude of the signal. The interference/noise hits each cable the same, so when it is subtracted at the end... 1.237 - 1.237 = 0, in theory.
@Delkomo4 жыл бұрын
Can you elaborate on the difference between commercially marketed “single-ended RCA interconnects” and “coaxial cables”, if any?
@murdamechanik2 жыл бұрын
I’m trying to figure out if my amplifiers are differential or single ended. Mosconi as100.4 measured approximately 1100 ohms. The amplifiers are measured that are differential are like in the 10 thousand plus ohms readings.
@mr.tuckers28487 жыл бұрын
Well described!! Thanks for the great explanation. I'm in the middle of doing a sound system upgrade for my car. I was told that the best way for me to keep my stock head unit in my car and connect it to an aftermarket amplifier is to tie an RCA cable to the 5 output pairs (Front right/left, rear right/left and sub) going back to the amp. Someone mentioned it was a "Clean signal" coming from the stock headunit. If this method is true, what happens to the braided shield if I were to strip the other end of the RCA? Do I tie the shield together with of the ground wires coming from the 5 output pairs? Thanks for any help in advanced!!
@jasonkloos63487 жыл бұрын
R C the output you are getting from a stock head unit is already amplified. You need a line level converter. If you tie the amplified levels to an RCA directly to your amp you are going to have major problems.
@Curious-z4s8 ай бұрын
Really enlightening!
@DAmoreEngineering8 ай бұрын
Glad you enjoyed
@ericpham78713 жыл бұрын
Could fiberglass or internal mirror light conduits help better with future further use?
@jonaslithen72409 жыл бұрын
Good and informative video. Could you add some examples of amps with differential RCA inputs? I have seen lots of amps and I must say I only come to think of one that did not have RCA ground connected to ground.
@u2bed918 жыл бұрын
My 2008 model Kicker ZX750.1 has differential inputs. It also has a button to switch between low and high level signal, which eliminates the need to use Hi-Low converters. On the JL Audio there's an article that says it could be part of the same circuit. So my guess is that if they have the Hi-Low input switch they definitely have differential inputs. JL amps also use differential inputs.
@vietcong4u11 жыл бұрын
the Pioneer it alway seem to have louder volume then many head unit out there, even my alpine cda-9887 say 4volt , it is really low.... so to increase the voltage out put of you rca out put , you can go buy an inline drive ( audiocontron - the matrix for 140)
@zachhecksel292011 жыл бұрын
Never knew! But what brands go under which category? Specifically looking for Rockford's, as that is what I have. T series. I'm guessing differential since their rcas are twisted.
@StephHolt7 жыл бұрын
Great presentation!
@KOZ-k1p3 жыл бұрын
Thank you. but i am not sure i understand how to tell if the amp is single ended: should it have no resistance between the rca input and the ground ? i think you mentioned it should have 1000 ohm or less ?
@NateHarrisCreations7 жыл бұрын
Which rca to use if the amps need twisted pair (Taramps) and the head unit and eq needs coaxial (Sony head unit, Rockford 360)
@pokeyouindaeye4 жыл бұрын
Interested as well in what to do in such cases where there's a mismatch...
@wiz150012 жыл бұрын
Now I know......Thanks I love it when smart people talk..lol I now need to find out if my PDX's have a single ended input.
@joe339312 жыл бұрын
Like this video a lot. Good future reference video. Thanks for putting something up like this. You seem very intelligent and I trust your knowledge? Coming out with any more technologies soon?
@jyminewtron14166 жыл бұрын
Is that noise you talked about the buzzing noise i heard in my old sound system?
@HitemWithTheFlex12 жыл бұрын
Would this mix up of RCA on an amplifier cause some scratchiness or quite white noise effect? I'm not talking about alternator whine or something like a ground loop whine, but I mean just the different cable causing noise.
@ryanwaterworth70554 жыл бұрын
Interesting video. I think I have a differential amp. I have always been told to stay clear of unshielded twisted cables. When playing from a digital source with my shielded cables I have 0 noise when playing from my phono preamp I have lots of interference. So if I do have a diffential amp (cyrus 8) Would the twisted cable eliminate this noise? I get more confused every day😂
@rezosimon59078 жыл бұрын
Two different cases, two different cables - you speak about cables, but what are the cases? The way I understood cases refer to different "amp system" (meaning, there are amps that better work either with SE or DI). I had a nice stereo that I wanted to use for my computer so I ordered an RCA in to be added, which the stereo didn't have. I'm now trying to understand do I need to get DI or SE cable. So my question was do you use SE or DI based on the type of stereo?
@portwill8 жыл бұрын
It's nonsense, just get a normal RCA cable! What he is talking about is balanced vs unbalanced cable, however today's hifi amps will always use XLR type connection for a balanced line, not an RCA, which is traditionally unbalanced and really not the best plug for balanced connection (mostly because of it's construction and how that it has a ring on the outside). So never mind, just get a quality RCA cable and you will be good ;)
@rezosimon59078 жыл бұрын
Thanks, good point!
@bpintogsxr10003 жыл бұрын
Wish I knew all this in the 90’s when I was just a high school kid getting into car audio.
@theejoeylee6 жыл бұрын
So in a way coax is passive noise cancellation, and twisted is active cancellation?
@rephouse8610 жыл бұрын
My crossover is single. Would it matter using the double from my head unit to the crossover before it gets to the amps? Only reason I ask is because I just got my expensive twisted rca in today. Wish I saw this video a week ago.
@ronnyshallam44206 жыл бұрын
So the higher end amplifiers you're referring here are class A and AB?
@dmar63110 жыл бұрын
Great video! Very informative.
@dsw-fb8mp3 жыл бұрын
Is it okay to use a twisted cable on a single-ended input? You said it is bad if you use a coaxial RCA cable on a differential input, but I did not hear (or maybe I missed it) you say if you used twisted cable on a single-ended input.
@tkay44015 жыл бұрын
How does the end consumer know which one to use? How would the end consumer know what kind of outputs the head unit has and what kind of inputs the amp has?
@ericstokes7242 Жыл бұрын
Wouldn't this require a HU with differential outputs? Otherwise, how would would the sine waves become inverted to one another across the twisted pairs to begin with? Seems to me that the wire that goes to the sleeve on a twisted pair rca would not carry a wave at all if the HU has 'single ended' outputs, as it were. From what i see after a google search, HUs with differential outs are a unicorn, only a few boutique models have ever had them.
@devinpierce765311 жыл бұрын
Really informative! Good video.
@Zhigre12 жыл бұрын
Does this mean that you need to know what outputs your head unit has? if the output rca from the head unit is the SE style, then the outer jacket of the rca which would be ground would not work for a DI style cable... could you please elaborate on that point? Thanks.
@mrknox211 жыл бұрын
awesome video, but I have one question if the amp has Diff inputs and I was using coax cable would I only get half the signal to the amplifier?
@mikeunivers8 жыл бұрын
which one is the best for car amplifier
@tonydamore70648 жыл бұрын
Usually coax type (single ended)
@u2bed918 жыл бұрын
+Tony D'Amore Why is single ended "best"? Aren't differential inputs a bonus and an extra cost on an amplifier. Wouldn't the the noise cancelling technology make it better? Not trying to contradict, just thought you would've said differently.
@amb3cog6 жыл бұрын
u2bed91 He said "usually", because (like he said in the video) most people have SE amps, and not one with DI. In other words most people will need that type for the type of amplifier they have which most times will be a SE one. If DI were more popular. He would have said the opposite type is "usually" better to use. He never said any one was best, just that one is more common.
@hcgarcia11 жыл бұрын
Great video! I'd say most head units have SE outputs right?
@lurice09 жыл бұрын
Interesting. WHat does Rockford Fosgate T600-4 amplifier use? SE or DI? And he tells how to test for SE inputs. How does one test for DI inputs?
@tonydamore70649 жыл бұрын
DI
@IliyaOsnovikov6 жыл бұрын
Isn't twisted pair gonna reject common mode noise regardless of input connection if the amp and a signal source are not physicaly grounded?
@maxheadrom30882 жыл бұрын
For those balanced headphones connections, does it make any difference which type of wire I use? Thanks!
@alexanderreeve51683 жыл бұрын
Why is this not mentioned anywhere ever? This 8 year old video has explained why swapping around RCA's has cured noise in some of my systems when the RCA's themselves had no faults... awesome.
@j.wat.34378 жыл бұрын
Can you use woofer cable to serve as digital coax cable?
@DWES41512 жыл бұрын
thanks for the info! never knew this. i had a pioneer avh-4400bh and swapped out for power acoustik pnk-761. i had a couple issues wit this but one thing im curious about is why the sound was much lower than my pioneer. they were both 4 volt pre outs. could the wrong type of rca cables affect the travel of sound volume to the amps or was this stereo reallt just that bad?
@ansalon7212 жыл бұрын
Good information, Tony. Thank you.
@cncgeneral11 жыл бұрын
Does your source unit have any effect on what cables will work best?
@janiss99993 жыл бұрын
I have got 2 question. How can i know if cable is balanced or unbalanced if i look at it or any other way to find out.? 2. If my amp has balanced rca input and i have got balanced rca cable do i need also headunit or any other source wirh balanced rca output?
@RobHTech4 жыл бұрын
Per JL website: "JL Audio’s Differential-Balanced Input circuits" ... "This works equally well with differential-balanced, or unbalanced signal sources, making this input architecture compatible with all standard car and marine audio equipment, using standard, unshielded, twisted-pair RCA cables. No special cables are required, unlike the fully balanced connections used in professional audio" (jlaudio.zendesk.com/hc/en-us/articles/209357588-Differential-Balanced-Inputs). ----So which are you exactly referring to? Any specific amp for example?
@RailManSD11 жыл бұрын
What's the difference between Differential Input signal system and a Balanced signal system (like an XLR cable) ? I'm guessing DI inversion occurs in the amp (receiving end) and Balanced inversion occurs at the source (transmitting end). Correct me where I'm wrong.
@bestbudssmokeshop55874 жыл бұрын
Your a smart Guy Well Explained ! Can U Explain How to Wire 2 12" Dual Voice Subwoofers To 1 Ohm ...?
@promo1304 жыл бұрын
if you use the wrong rca can it also make the amp go in to protect?
@OrionHCCC263 жыл бұрын
No. It will just allow additional noise
@promo1303 жыл бұрын
@@OrionHCCC26 oke, in my old car i used my 12 year old rca cable but never heard any noise sounded great
@marleystagg294012 жыл бұрын
well there's something i didn't know, now i do thanks! awesome vid & info bro!!!
@juliobello45618 жыл бұрын
I'm using DI in my Polk audio amp since November and I haven't had a problem but I'm curious what's the side affect because I didn't understand that much in the video
@69MazdaR1007 жыл бұрын
This works 100%, I personally experienced this a few days ago. Has a pair of twisted high quality stinger rca's that were introducing noise, and after replacing them with a $5 junk pair of Aerpro coaxial rca's every bit of noise/whine disappeared.