@streetsmart,
mode 1 - when small with limited bass signal handling front speakers are connected
mode 2 - when large wideband front speakers are connected
I checked the specs of the M73:
frequency response - 48hz-20 khz
LF response - 43hz
Not sure what category my speakers fall under
based on your suggestion though, i should try mode 1 (small) first.
also, there are 2 things i'm not sure i understand:
1. there's a "low pass crossover" knob at the back, and the manual says to use this knob to select the high-frequency range at which you wish to cut off the signal to the subwoofer. its from 40hz-120hz (which is called Direct). It says when the subwoofer direct feature is invoked, the subwoofer plays all frequencies up to 200hz.
*per your post above, is this the one i should set to 120hz?
2. there's a "high pass crossover" switch (and you can choose between 100hz and 80hz). The manual says, smaller speakers with limited low frequency output may perform better using the higher 100hz setting while large speakers with geater low frequency output may be able to handle the 80hz setting.
re "phase switch", its in the remote - with the following options: 0, 90, 180 and 270. will fiddle around with it as suggested.
i'm reading up stuff found in the internet, didn't realize that the subwoofer would be the most difficult thing to set-up (in terms of settings).