OP: Some of the biggest improvements in clarity and imaging from adding a subwoofer happens from adding a high pass filter to the main speakers, so if you can I encourage it. 80 Hz is about as low as I'd go. Many audiophiles try to add a sub under 30-40 Hz to fill in, but they are amazed when they let the sub take over more of the range.
Subwoofer 101 Needed...
I have just picked up a used custom made 15" subwoofer to supplement my existing speakers. It came with an extensive array of variable control parameters. (Please see included photos.)
Being a Newby to the world of subwoofers, I would like to ask for a bit of guidance in their use. What would I expect to hear/measure (using REW) using them? (For example: varying Q?)
I am not interested in thunderous AV, but rather an unobtrusive refined extension to the bottom end for listening to classical, jazz, world and occasional pop music.
I look forward to your thoughts and appreciate any assistance. Thank you!