chillin

I think it says high pass on your amp. Basically it cuts off the notes below a certain frequency. It will prevent your amp from putting full power to your sub below the tuning frequency of the box which will prevent your sub from over excursion. You will still here sound below the tuning freq, but based on the slope of the high pass crossover.

Dukk

Truly it should be called an infrasonic filter - a highpass filter that takes out the bass below the audible spectrum.

Typically this is a point from 20-30hz as there isn't a lot of real music that low and it takes a ton of both power and cone excursion to reproduce it. Utilizing one in any system makes life easier for both your subwoofer and the amplifier that runs it.

audio1der

@Paul- I set my infrasoncic filter point at the same point as my port tuning to ensure the sub doesn't unload below that. I thought that was a pretty good general rule?

As for matching sub/amp, as long as you keep the power clean (no clipping) and watch for over-excursion you can run a TON more power than a sub is rated for. In fact, that's a good way of ensuring you have adequate power for the sub, to have way more than enough and never need to clip it.

leagumdrops

I tried that box but I could not find a woofer to sound good in it I will probably just throw it away