JBL network schematics for dual woofer systems often use a LP inductor value of about twice the "upper" woofer one for the "lower" woofer, "to promote a smoother response" in the xover region. You might try running the upper woofer "fullrange" or pseudo-1st up to 1.6kHz., and "choke" the lower woofer around 800Hz. Sam

For all intents and purposes, the amp is "seeing" the same load as a single 2226H when it's driving a 4648a-8 system containing a pair of 2226J's. The MAIN reason I'm running the dual 2226J's is ECONOMIC. But it still takes the pair of them per side to do the work of a single 2035H or 2226H. There is no inherant "benefit" running dual 16 ohm drivers vs. a single 8 ohm one in this specific case. UNLESS 1200 watt power handling capability is needed:)

Dual woofer DOWNSIDE is the larger enclosure needed, the extra weight involved, the "notch" at 820Hz.

I'm not sure about what a SET will do with the back emf...burp it back into the HF driver like a chirping piezo?:(

Dual woofer UPSIDE...hmmm...looks cool? Positions the HF horn at a GREAT height relative to the listener. Oh yeah, and the "power response" matches that of a 90x40 horn at 800Hz. Whatever that means:) Sam

This approach sounds logical. I know you've played with the 4648's a bit. Does a inducter value of 1.4 mh for the upper woofer and 2.4 mh for the lower woofer sound about right? Do you still have your 4648's running with Altec horns? What's your long term impression of the combination? Thanks! Jerrod