Hi all! I have this setup: - Yamaha RX-V650 receiver. - Pioneer DV-575A DVD player. - Two pairs of Wharfedale 9.5 floor standing speakers (front and surround) - One Wharfedale 9.CS center speaker (placed directly below the TV). - A pair of Wharfedale 9.0 front presence speakers. - One Wharfedale SW150 subwoofer. - Profigold Subwoofer cable (rca-rca). - Chord Carnival Silver Plus cables on all other channels. My receiver has these settings: - Center speaker set to SMALL - All other speakers set to LARGE - Bass Out: SWFR - Crossover at 60hz - Subwoofer Phase, that can be set to NORMAL or REVERSED. The sub has its own crossover, currently set to 85hz (maximum), and volume control (set at around 45%). And it has a phase control with two options: 0 or 180. I'm having real trouble setting the right phase for the subwoofer. - First of all, how do the phase controls from the receiver and the subwoofer interact? They cancel each other? - How can I tell if the subwoofer is in phase? I tried all possible combinations with the phase controls on the receiver and on the subwoofer. I get two possible results: 1 - Louder bass, but a lot more "boooom" effetc, and the bass sound lasts longer (it seems). If I touch the subwoofer cone, and one front speaker bass cone, they don't seem to be quite in synch with each other. 2- Quieter bass (just a little), almost no "boooom" effect, and a more instant sound (bass lasts less time). If I touch the subwoofer cone, and one front speaker bass cone, they seem to be more in synch with each other. Which would represent "in phase" situation? 1 or 2? I like the impact of situation 1, but not the boooominess... By the way, my subwoofer is placed on the side of the left front speaker, in perfect alignment with the front speakers, It has a wall behind (like the front speakers). I'm sitting by the opposite wall. Thank you very much for your help!