Thanks for the response!
• Power switch 'AUTO'
• Hooked up to Cambridge Audio Azur 551-R receiver
• Crossover 'OUT'
• Sub volume control @ 8 o'clock
• Sub level on receiver: 0 db
Just to clarify, sub works as it should (I think) in playback. What concerns me is when I adjust sub volume using volume control on back of sub; seemingly TINY adjustments in setting result in LARGE changes in volume. In other words, hair-trigger sensitivity to adjustment. Is this normal?