A dual filter with self-resonance.
Straightforward build, quite a few parts.
And when done it sounds great, this is a nice unit and since it’s a double will save you rack space with good sound. Recommended.
I've got the Kit here waiting to build, hoping its going to be just the thing to match with my Acidrain Chainsaw's stereo outs.
Enjoy your spare HP, don't rush to fill every last space, this is not like filling sticker books. Resist the urge to 'complete' your rack, its never complete so just relax.
I like this one quite a bit, think you will also. And having a double saves rack space!