Thanks trikos, I feel very good about setting my crossover at 80Hz now. My receiver definitely needs help with the amp.

On my receiver, the subwoofer has 4 different modes.

1. To output low frequencies of all channels from the sub
2. To output low frequencies of the center and surround from the sub.
3. To output only the LFE channel.
4. Subwoofer off

Can I just set the subwoofer off and play with the LFM-1 crossover? I was wondering if this is the case, how can I select to output low frequencies of all channels or just the front or just the rear from the sub?

Thanks again with all your help.