sub problem

Hi bberman1: The car parts ....i ment plastik parts which can shake and make noises.But about ground.i think is good i have sanded surfase and made hole ,put a screw and nut.Is it good?But i am not sure about case that i put both amp's grond cables in the same hole..can i do that? Thank you

That sub can have a volume of 1.3FT^3 - 2.5 FT^3 Now turn off the subsonic filter. If it doesn’t have an off switch then turn it to the highest frequency you can and let me know how it sounds.

Normally you don’t have any problems sharing ground points but every once in a while you get engine noise but not necessarily distortion. However you might want to ground your sub amp separately and see what happens.

Hi bberman1.I did turn off the subsonic filter it's still cant hold enoug power.May be i want too much?Can you this warning from a alpine setup? "Warning: Since it is possible to overlap the subsonic and low-pass filters, you may create a condition where amp will produce little or no output. Make sure that the subsonic filter frequency is significantly lower than the low-pass filter frequency, unless you have a very specific performance goal in mind" Any ideas how much power it can handl? Thank you

Can you explain this warning

What it means is if the subsonic filter and the low pass filter are set at the same frequency. They will cancel each other out leaving little frequency to amplify. Thus putting out very little sound.

I think that's what hapenning with my amp"They will cancel each other out leaving little frequency to amplify. Thus putting out very little sound"

What to do is set the subsonic filter as low as it will go say 15 or 25 Hz what ever the lowest is. Then turn the lowpass up as far as it will go say 250 or 500HZ see if it sounds better.

If i put 200 Hz which is the highest it's worse.So i tried put lower till 50 Hz and its better but not any louderI do not know what to do...Confused

What do you have the subsonic filter set at?