I can biamp with my hk avr7550hd by setting the avr to 5-channel stereo mode. You then have to set center channel to off and speakers to large and no sub. So then the right front and side have the same full signal and the left front and side have the same signal. '
You might have to connect a tv in order to make these settings.
You might have to connect a tv in order to make these settings.