Originally Posted by bo58gardner
ok, the sub was called powerbass not probass, and like i said it was out of gibralter trade center so the amp could be some generic make.
Sub sounds like junk to be honest with you, and without knowing the brand of the amp, I wouldn't even think about it.
The sub and amp that I have are better by a very large margin and would cost marginally more than those.
But to answer your question before, here'* how it works.
Amps need a few things to run. They need power, they need a power signal wire (to tell it when to turn on and off), and they need the audio signal to tell it what to play through the sub. There are two ways to get that audio signal, either from RCA type connections in the back of an aftermarket head unit, or through high level inputs. RCA connections are low level inputs, because they have a low power level. High level inputs are basically taking your existing speaker wire, splicing it, and connecting it to the amp, if it supports a high level input. That way, the amp will take the signal from the speakers you currently have, convert it automatically to a low level signal, and amplify it through the sub. If that amp does not support a high level input, you need to get a converter box that will convert the signal from a high level input to a low level RCA output. Those can be had for $15-$20.
The following amp only has a low level RCA input:
The white and red connections are the RCA'* for low level input.
You would need one of these in order to use it:
Or, you could get an amp like this. This amp has two high level inputs and two low level inputs because its a 4 channel amp. It would be used to power front and rear left and right speakers.
The high and low level inputs are labeled. These amps come with connectors to plug into the high level input ports with wires to connect to your existing speaker wire to pull the signal from.