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I've recently got a new amp, its an alpine MRP M500 and its 500W rms. Its powering a pair of 12" subs in sealed boxes.

Anyway, I've installed it, it looks nice and its loud but I'm still playing about with the settings and I've got a few questions.

Firstly, does anybody use the bass boost control? Whats the point in it? Surely if I wanna boost the bass I can just turn up the gain and/or turn up the subwoofer control on my headunit. Anyone know exactly what it does?

Secondly, what do you lots have your crossover frequencies set at? I'm trying to get a smooth transition between the subs and normal speakers across the frequency range. At the moment I've got the HPF crossover freq for the normal speakers set at 100Hz and the LPF crossover for the subs at about 150Hz. It sounds OK I think but is that too much overlap, too little, should I shift both crossovers up or down a bit? Any thoughts or opinions would be much appreciated.
 

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Ok well the bass boost makes the bass louder. It actually boost the bass. It is kind of like turning up the bass on your HU but the bass only goes to subs not speakers. And then if you are listening to a song where you don't want alot of bass then you can just turn it down.

And the crossover you really just play around with until it sounds just right. IMO
 

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has a screw loose
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I don't use any bass boost with any of my amps , I adjust everything through the high pass and low pass on the crossovers to find the sound I'm looking for.
I try to keep my bass frequencies pretty low I think around 80 to 90 htz I think don't quote me on that . But I'm not a bass booming person either .

On the gain you want to cut everything down as low as possible , subs ..Since I assume you just have the 1 amp .
Put in a cd and adjust the volume to the listening level that you use . Slowly turn your gain up until you start to hear distortion or breaking up then turn it back down 1/4 turn and it will be set.
Then you can adjust your crossover's from there.

But like Focusboy5 said it's all about the way you like it in the end .
 

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Detailing Freak
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depending on your speakers and subs...

i had my speaker amp set to all pass, and filtered it on my pioneer deck, at about 100hz

the subs, i had right at 100, filtered on the amp
 

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From my personal experience, I would suggest a subwoofer be low passed between 60 and 80hz. Anything higher than that, and you can "localize" the subwoofer.

Ideally it should blend and its location be un-noticed.
 
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