To answer some questions, the Spendor sub has a bit more power, 130 watts instead of 100, has a continuously adjustable crossover from 50-90hz [instead of 22-90hz on the REL], has a vented box instead of a sealed box, and costs $1169 instead of $1495 [I think] for the REL. Unlike the REL, the Spendor does not have high level inputs.
Thanks for your thoughts.
Thanks for your thoughts.