If you have good shielded RCAs with twisted pair wire inside, how much interference can still be expected to get into them on their way to the amps in the back?

If I use a line driver to boost a 2.5v signal into an 8V signal, does the line driver itself introduce any noise or other unwanted effects such as potential for a ground loop since another device is being spliced into the line?

I've got a Phoenix Gold SLD44 line driver which I am trying to decide if I'm going to include in my new setup, or sell.

 

Zero.

Possibly.

I'd do it without first and see.

 

I'm just trying to understand the purpose and need of a line driver, with the existence of shielded RCAs.

I mean, I used to use it cause the deck I had put out only 1V on the RCAs and I wanted to make sure the amp got a more powerful signal to work with since the gains had to be all the way up.

But doesn't the gain on an amp boost the RCA signal using the same hardware inside as a line driver?

 

line drivers are great when splitting an RCA signal many times to go to a lot of amps for an SPL setup..or as a cheat to help get a noise problem out of the audible range.. anything over a 2V signal is generlly more than adequqate..with good quality RCA's and 2V plus signal and there's still noise issues..it's usually a ground loop issue

 

Ohh okay yeah. I forgot about multiple amps.
Alright, well I'll leave it out of the initial build and hold onto it until my system proves to be noise free in the new car.

 

noise should always be fixed with the install not parts... my car as well as AVIDEDTR had to try a few ways of creatively running the RCA's to get ZERo noise.

 

A good sound system, isn't just buying parts, slapping them and seeing how it sounds..to get everything right usually takes some development. and trial and error

 

^ That's a good point. If someone is installing a system with multiple amps, maybe a processor, etc, they really should be prepared to have to do some fiddling before it works properly. If it fires up noise free on the first shot then you got lucky