Truth about RCA signal cables

single rca cable This is a topic that many people are looking for. bluevelvetrestaurant.com is a channel providing useful information about learning, life, digital marketing and online courses …. it will help you have an overview and solid multi-faceted knowledge . Today, bluevelvetrestaurant.com would like to introduce to you Truth about RCA signal cables. Following along are instructions in the video below:

“Right we re going to talk about rca s we have two different kinds rca rca s. We just came out with and they both use different. They each use technologies. And we re going to talk about why.

And that it s not just like a good better best deal somewhere along the lines in the audio world is kind of turned into like you know coaxial rca is good and a twisted pair is better or something. But that s not the case. There s specific cases. Where you want to use each one of these so we re going to talk about so we just came out with a single ended rca.

Which is a coaxial cable cut a conductor in the center. Right here copper shielding all around it and then we have a twisted pair. Which is two wires twisted together to the exact same type of wire. So.

The idea is you want to use single ended rca s. If you have an amplifier that has a single ended input. Well what s that mean that means that the rca connector on the amplifier. The center pin is this is where the signal goes and the outside is actually grounded so if you don t know you can take an ohm meter and connect it from your battery ground to the shield of the rca and see if there s conductivity.

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There you should have you know either ground or maybe a thousand ohms or less or something that would tell you that you have an amplifier or signal processor with a single single ended input. That s what you want to use this kind of cable. If you have an amplifier that doesn t have ground on either the center terminal or the the ring of the rca. Then you probably have a differential input amplifier typically these are found on you know your average amplifiers and these are found on some of the higher end type amplifiers.

But you never know a lot of them are like this maybe. 70 80. Percent of them are the single ended variety a small percentage are this differential input. But this is a better way to go if you use the right cable.

So here s how here s how this works and here s the methods they use to reject noise. So let s talk about how these two different systems. Work. And how they each have their own method for rejecting noise.

And the single ended kind of cable needs to be used on an amplifier of the single ended input. And this cable has made for amplifiers with differential inputs if you mix them up. They don t work as well or work at all so i mean the work. But they re going to be noisy.

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I don t know why this information disappeared from the industry. But i m trying to bring it back so here we go so single ended rca. This is the coaxial type rca. It s got the copper braided shield all around the wire in the middle.

The conductor in the middle. This is the amplifier here inside. We ve drawn the input as this little amplifier triangle here. So what happens is the signal.

This is the right ear goes to the input of the amp and then the the shield. Part is just grounded. So it creates this grounded shield around and just doesn t let any noise through so the result is supposed to be your signal is here. And it s free of noise.

Because no noise was able to enter due to the braiding shield and out comes your signal with no noise on it that s the idea. There if you have an amplifier the differential input it works a little differently. There s a few more parts inside. Typically these amplifiers are a little bit of the higher end variety.

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This is more common this is probably on 75 of the amplifiers out there. But some of the higher end ones have a differential input. If you have that you need to use twisted pair cable. If you use this one it s not going to work right the method here is that noise is going to come in to this try to come in to this.

And it s going to come in on both lines equally see on this one noise tries to come in but it s blocked by the shield. So that s how that one deals with it this one we allow the noise to come in and it s going to come in on both wires. The same and so what happens is you have on the center. Pin.

You have your signal with some noise on it and then on the shell you have your signal again except for it s out of phase. That s how these systems work. And it has the same exact noise on it so this comes through here and this is just grounded. So nothing really happens to it it just comes out as your signal with noise.

Just the way it went in seam. Here you re out of phase signal and then this goes into the last stage of this input. And what happens here is you know one of these is the non inverting input. One of these is inverting.

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So this is going to subtract these two signals so if you subtract a signal that s out of phase from a signal that s like saying the signal. The signal type. 2 is so they add together so what happens is you get 2 times. The signal and the noise is the same on both ends so the noise get subtracted so you get 0 noise the whole signal.

0 noise so that s how this system works that s how that s just the works now what would happen if you try to use this cable over here. The noise would just come in and then you d have signal and noise. And the noise. Here will be grounded out and you would just end up with signal and noise again so it doesn t really work and if you use this cable on this type of an amplifier.

You would have the signal maybe with no noise or little noise. And then this end is just going to have some noise on it and no signal and you re going to end up with signals. A little bit of noise on it over here so two different cases two different cables. ” .

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