Originally Posted by Maikel400
But my sub is going to 120Hz ?
Your Onkyo 626 is a modern AVR. That means it has a Bass Management system inside. What does that mean?
The subwoofer output sums up two input signals.
1. The LFE (Low Frequency Effect) signal carried by the .1 channel,
2. The bass signals redirected from all speakers below the crossover point provided the speakers are set to "small" in the AVR.
The LFE channel's LPF (Low Pass Filter) should not be set to anything else than 120 Hz. That's the max. frequency that is recorded into the .1 channel.
The 80 Hz crossover recommendation is based on scientific experiments that have shown that the human ear practically looses its directionality clues at around and below that frequency, therefore it is best to let the subwoofer (aka Big Brother) take care of bass which needs a lot of energy/power to produce the required SPL (Sound Pressure Level).
There's a good read on the subject "Small vs. Large"
. Worth reading.
Hope this helps. Edited by mogorf - 10/30/13 at 4:43pm