D class amps

Whoaaa! Could you PM me the whole story?

How's about I let it out of my bag of tricks for all to see, it is really quite simple. As long as the amp sees a stable impedence, we can do pretty much anything. Here is how I did this, if I remember right.

Take 36 single voice coil 4 ohm subs, I used the basic Rockford punch subs.

Take 18 generic ported dual 12" sub boxes. I used the Megahertz CR212P ( a perfect match to the subs)

Stack the boxes 6 high and 3 wide. Install all the subs. Take a sheet of 1/2" plywood and anchor the backs of the boxes together (don't want the leaning tower of subwoofers)

Wire all boxes in series to 8 ohms each, thus 18 8 ohm loads

Think of each stack as two stacks of three 8 ohm subs, parallel wire the three boxes together, each stack of three now should have a reading of 2.67 ohms. Parallel the top stack of three to the bottom stack of three on each stack of 6. Each stack should now have a reading of about 1.145 ohms.

Now you should have 3 stacks each with a reading of 1.145 ohms, series wire each stack for a final reading of about 3.345 ohms.

I'm going from memory here and this looks pretty close to what I had, can't remember for sure. This setup wails, even though each sub was only seeing about 5 watts, it played well into the 140db range here in the front of the store. No replacement for displacement. And yes indeed it did knock the phone of the wall next door.