1) Stereo subwoofer option. Subwoofer L/R outputs can be configured in either mono or stereo mode. In mono mode, the LFE channel is combined with the output from the other channels, and the sum is low-passed at the crossover frequency set for the main, center, and surrounds. In stereo mode, the left subwoofer receives low-frequencies from the center and front/surround left channels. The right subwoofer receives its low frequencies from the center and front/surround right channels. The LFE channel is directed to both subwoofers, and the sum is low-passed in the same manner as the mono configuration.
2) Analog 5.1/6.1/7.1/8.1 inputs that can be bypassed without processing or digitized with ADCs for bass management and use of proprietary processing, if present.
3) Upgrade capabilty for both hardware (such as installing a PCI card) and software (such as firmware upgrade through RS-232 or other port) to make it futureproof.
Will add more later.
John
