[fgtpsi]

Gday guys,
Just after some advice,I have a ba xr6 with prem sound,but had a high-lo converter spliced in and running my subs,signal wire from the cigarette lighter.
It seems my system will be bassy then all of a sudden its not as bassy, but then when i turn up the bass control on the factory unit it'll kick back in?
Im on my 2nd amp and it seems to be fine for a few weeks,with no problems at all,then just start doing it again?
Any ideas?

Thanks Mark

Also could you tell me if the factory amp runs just the subs or rear speakers and sub?