Thank you. Those impedance values pretty much rule out the use of the second (parallel) output from the Unlimited to drive all the powered subwoofers. I also remember reading somewhere that selecting too large uF output coupling capacitors can have some undesirable sonic side effects and the designers generally strike a balance between the size (uF) and coloration. Anyway, researching some older discussions on the distributed bass array topic, it looks like a more practical approach is what AudioKinesis uses in his acclaimed Swarm where I believe he utilizes a single kilowatt class AB amplifier to drive four passive subwoofers.
https://www.parts-express.com/dayton-audio-sa1000-subwoofer-amplifier-rack-mountable--300-811
But even with this amplifier with a published 12K Ohms input impedance, I'd get a combined ~11K Ohms which probably works well with most if not all SS preamps but borderline for most tube preamps.
I'd like to hear if anyone is driving a distributed bass array system similar to the Swarm using a tube preamp as the signal source.
Thanks again.
https://www.parts-express.com/dayton-audio-sa1000-subwoofer-amplifier-rack-mountable--300-811
But even with this amplifier with a published 12K Ohms input impedance, I'd get a combined ~11K Ohms which probably works well with most if not all SS preamps but borderline for most tube preamps.
I'd like to hear if anyone is driving a distributed bass array system similar to the Swarm using a tube preamp as the signal source.
Thanks again.