I thought it was about time we had a general subwoofer advice thread. And with that, I’ll start it off with my request for powered subwoofer advice. I have a 2 channel set up in my living room. It is for music only. The room is approximately 15 feet deep by 21 feet wide with 8 foot ceilings. It opens up into the dining room, which is approximately 10 1/2 feet by 12 1/2 feet. My speakers are NHT C3 bookshelves on stands. They are a 3 way, sealed design. Soundstage and imaging are fantastic. They are amazingly clear and neutral, however they lack punch and low extension. I have read multiple subs (2-4) will sound more even at multiple positions, which is desirable for me, as most listening will be done out of the primary listening spot (the C3’s are excellent in off axis response and sound great from anywhere). However, that raises the need to spend more and size/WAF is crucial. When I was first looking at single subs, I was considering the Monoprice Monolith M-10S, HSU VTF-2mk5, Rythmik L12 and the Martin Logan Dynamo 800x (for its room correction; otherwise seems overpriced). But now that I’m leaning towards 2, some of those larger sizes will become an issue for the second one (not to mention price). So RSL Speedwoofers were added to the list. I’m not looking for validation of these choices but real advice on how I should handle this and if I should consider other subs makes/models I’m definitely open to it. Since I’m music only, I’m really only concerned about enough SPL down to 30 Hz. I don’t have sealed or ported preference, other than concerns of ported size getting to big and sealed having enough room filling SPL. A lot of listening will be done on the dining room b/c that table is used as a family area for legos, puzzles, etc. I’m hoping 2 subs resolve any suckouts and I can always add a MiniDSP or Anti-Mode (just for the subs) for troublesome peaks later.