I am thinking of combining a Pi 4 with maybe the Deltalite 15 and an Altec 811b/806a. I already have the Altec 811b/806a horns.

Thanks

even models nearly identical. note the higher zmax if you have a tiny tube amp (not real high, but some amps are picky here). Phase plug seems to tame the peak too. I want to try this driver.

Thomas

Could the bass response be better or as good as my 1950's vintage 15" coaxial drivers loaded in bass-reflex cabinets? Except for Altec horns and high frequency drivers, my goal is to move away from vintage drivers and gain the toughness and reliability of modern pro drivers.

If I would like to build the Theatre 4's with my own drivers, do I need to buy the plans? Can I get just the plans?

Could I use a simple 1st or second order crossover around 800-1k hz to combine the Pi Theatre 4 with Altec horns? Does the woofer and box alignment depend on the crossover? I looked for answers to these questions in the forums but did find answers I could understand clearly.

Thanks

Thanks

The delta-lite 15 is a direct drop in for the delta-15 woofer, yes? Whould there be any significant difference with low frequency responce, distortion, or even mid-range characteristics that would make the expence a viable option to the curious minded. Also while I'm jabberin here, I've wondered about bi-amping the theater 4. I've noodled around some past posts and understand the compensation circuit for the compression horn needs to stay either between the electronic crossover and horn or built into the electronic crossover. But does the woofer's large resistor between its terminals need also be intact for proper implementation of the electronic crossover? Same crossover frequency or can that be tinkered with, lower say, what with a steeper 24db slope? Thank you always for doing what you do.
Rick