Today I installed a MTX Terminator TNE212D loaded sub enclosure with a Rockford Fosgate R500X1D amp. Everything seems to be working as it should and all that's left is to set the amp properly. I'm using the factory head unit and have tapped into the rear stock subs for the amp input.
Many of the tuning guides out there say to turn the volume on the head until up until it distorts, back it down, then do the same with the amp gain, but that doesn't sound like a good idea in my case.
First, turning up the volume until it distorts would be extremely loud and I would fear for my speakers and ears. About 3/4 volume is as far as I can turn the head unit up comfortably. It's a premium Harmon Kardon stereo system, so I would assume that the stock stuff is already set so that it could be turned all the way up without distorting? Anyway, 3/4 volume is as much as I'm willing to go.
Second, turning the amp gain up until the sub distorts also sounds like a bad idea for the same reasons, extreme loudness and fear of damaging it.
Anyway, with all that said, I think my plan is to turn the head unit 3/4 of the way up and then increase the amp gain until it sounds comfortable.
Next comes the LPF. Being as I'm tapping into the stock subs, the LPF has already been set on them, so I'm able to turn the LPF on the sub amp all the way open unless I want to only allow frequencies lower than what the stock subs get.
Any reason I shouldn't leave the LPF on the Rockford amp all the way open like that?
Now is where I get a bit confused with the Punch EQ aka Bass Boost. There is an adjustment for it on the amp itself and a remote knob. I'd like to have everything set so that I can have the remote knob at about 1/4 to have a normal listening experience with a little added bass, and then be able to turn the knob up to make things shake. So, should I turn the Punch EQ on the amp itself to 0, set the knob to 1/4, then increase the gain until it sounds good at a normal level? Or should I set the Punch EQ on the amp itself to halfway or something, the knob to 1/4, and then adjust the gain? I guess what I'm confused about is the difference between the Punch EQ on the amp itself VS the remote knob. Do they combine together? Does the remote knob override the amp adjustment or vice versa?
Any answers I could get here would be greatly appreciated.