typical markup is 500%, so if they (PG) are selling at $300, then there is like $60 of parts and labor in it. They just have the advantage of buying things in bulk.

What truly would be interesting, is if these new hccas could go down to the 1/4 ohm load, or even 1/8ohm load?, as the originals-i had a hcca4225, and let me tell you that when i say it go soooo hot u could fry an egg onit, that is no exaggerration cheater amps were a result of power classes in com...

Says his box is tuned for 24Hz, which may explain the large amount of excursion. I wouldn't think this would be damaging the woofers, unless his box has no useful damping factor and the subs are just wangin' more or less free air (which doesn't appear to be the case). In a ported box, the speaker i...

That's the problem with SQ, it's VERY diffcult to quantify.

why in the world would you fuse a cap ?

you will also find that sealing the holes in the doors will give you muchos more midbass

ESR is called Equvalent Series Resistance, all electronic devices have an associated resistance and it's modeled by putting a resistor in series with the device. Why ESR is important: Volts = I(amps) X R(resistance) If the ESR of a cap is say .040 ohms and you are drawing 150 amps on a peak, the vol...

That cap would absolutely blow for car audio, literally. The connectors are on a seperate PC board, you can be assured the ESR is so high as to make it useless. The worst part is that it's only rated at 15V, I will GARAUNTEE you that cap won't last a month in a car.

my guess is that the box is the right size for the 12" and too big for the 10"

If your amp is bolted/srewed straight to the chassis, some will actually stay on - even if the stereo is off.