| When you send test tones, try to send some with a second harmonic playing at the same time, it will help you detect if it's the room or a technical pb. It's hard to hear below 60Hz if there are no harmonic content at all (i.e. F-M curve, and the brain cannot "phase lock" at all below 80Hz). Usually the sub produces mechanical resonances that help in that matter, but the better the sub, the less mechanical interaction...
That is all very strange... |