[arpaul15]

(08-31-2011, 08:34 AM)paolo Wrote: that could very well be it. The stock amp is probaly tuned for a specific input level, using that with an aftermarket amp may very well be a lower signal level going into your amp. I used to own a kenwood amp, also 600watts, it had an adjustment for the linelevel input to compensate if the signal was too high or too low, does yours have this? if it doesnt then that would be the problem.

Mine does have the adjustment thing. I cranked it all the way up, it did help, yet it wasn't as effective as it was when it was in brother's vehicle. I bought a line level converter earlier, gonna try that out tmrw.