I use a 30-band equalizer with my DIY subwoofer and recommend narrow-band equalization to other audiophiles with subwoofers. If you want to set an equalizer, everyone "knows" you use pink noise or warble tones. What everyone knows is completely wrong for finding and "fighting" room standing waves. A standing wave needs time to develop. Pink noise and warble tones don't remain at the same frequency long enough to fully excite a room standing wave. The right test tones to use for your battle against standing waves are sine waves: slow sine wave sweeps to estimate frequency response variations (+/- xdB) including all room resonances ... and discrete sine wave tones to discover the specific frequencies that make your listening room "boom" and cause the sound to decay at a much slower than normal rate. Using pink noise or warble tones with standing waves is sort of like looking at the world through rose-colored glasses -- pink noise and warble tones make the bass frequency response measure a lot better than it sounds! There seems to be a misunderstanding about what equalization does to standing waves in a home listening room. Equalization does absolutely nothing to standing waves. The standing waves were there before equalization ... and they will be there after equalization. The equalizer does absolutely nothing to absorb the energy of surface-to-surface room reflections that cause standing waves. Using an equalizer to restrict the output of your stereo at certain frequencies is creating deliberate frequency response errors -- reducing output of certain frequencies from your speakers. This makes the sound less accurate -- but the problem you've deliberately created with the equalizer is likely to be a good trade-off: When you have a listening room standing wave that does bad things to certain sound frequencies, you can improve the sound quality by restricting output of those frequencies from your speakers (NOW) so you don't have to suffer as much with the room effects (LATER). The standing wave will not be as loud if you deliberately restrict ouput at certain frequencies. But the standing wave will still be there.