Has anyone tried this yet?
I'm pretty old and I'm not looking for bass that will knock my remaining teeth out. I just want a little more than I'm getting from the rear 6x9 Rockford Fosgates.
According to the 660s owners manual (which looks like it was written by an hourly employee at 4:30 on a Friday afternoon of a long weekend), you can bridge a couple of subs off of it using inline capacitors on the speaker positives and inline inductors on the subs positives.
From what info I could find out there in www land, people who have done tri-mode with two channels use an "L-pad" (or something like that) to control the sub volume.
Would this give me the bass boost I'm looking for? What size capacitors and inductors would be best? I always heard that anything below 120 hz is omnidirectional so would that be the best size to use? Will I be sacrificing volume on my 4 channels that I couldn't make up in gain? Or should I just bite the bullet and get the PA880, and power and ground distribution blocks?