Stereo Amp Install Help

[Dream240]

100x4 MAX @ 2ohms, 50x4 RMS @ 4 ohms 4-channel amp: Currently running it on 16 gauge power/ground wire, 4-channel RCAs, factory speaker out wires from factory amp location.


Okay I've been doing some searching and found out that so far, the stock wiring in an S14 SE with the factory amp is inadequate for really any amp upgrade. Here's what I've found so far:

Power wire running from battery straight to amp(in trunk, on hump) = 10 gauge (or better)
Remote power wire from head unit to amp = 16 gauge (or better)
Ground wire for amp - as short as possible = 10 gauge (or better)
Speaker wire outputs from amp = 18 gauge (or better)

Also I've decided to run brand new wiring from my amp to all 4 speakers since the factory wiring is old and seems to be to small (24 gauge?) for what I'm wanting to do.

Now my only concern is whether to use the high level inputs or low level inputs on the amp. Since my head unit has both the standard speaker outputs (high level) and pre-amp outputs (low level), which should I use? And really what's the difference? Also what happens when you use both?

Can anyone answer these questions? Or give me any more advice on the install? Mainly because I'm trying to reduce the buzzing. And I've already separated the power wires from the RCAs and got a good ground. I'm leaning towards installing the noise suppressors I've got but don't they reduce power output from the head unit to the amp? Resulting in lower sound performance?

Thanks guys.