Which subwoofers have at least a 20k input impedance as required for ARC preamp

The long title is the question. Very hard to find sub specs. Thanks for any information.

442509-11-2018 11:34pm

tketcham Details Discussions Posts This discussion Message User 267 posts 09-13-2018 at 10:57am Copy Comment URL Report Comment Edit Delete What about a buffer stage in front of the sub amp? You can find tube buffers with >100k Ohm input impedance. Regards, Tom