Quote Originally Posted by dooey263 View Post
When I plugged this combo in, it was like I added a subwoofer!
Not by any means to speak for the man himself of course, but you may look up GM's posts, regarding (paraphrasing) "...period correct high output impedance..." amps. It may provide some insight, per the B's in 828 cabs.

Advance search for author GM and string 'output impedance' should do the trick.

- may not apply to your newer 604's, but may...
- does not explain the 75%/25% breakdown per se.

Sooner than later I hope to rewire my Almarro to run in SET and see... there's a decware on auction locally, but it's already TRFMB.