Orion 8004 Owner's Manual page 11

Two-channel or four-channel input can be used for this configuration. For source
unit fading, use the four-channel input mode.
Front and rear outputs can be configured for high-pass, low-pass or full-range
operation.
Rear outputs are configured for summed bridged operation for subwoofer appli-
cations.
Only the rear speaker is controlled when using the RGC-1.
Tri-Mode Six Channel Configuration
Lowest recommended impedance is 2W stereo and 4W bridged mono.
Front and rear outputs must be set for full range operation.
Passive crossovers must be used on all components and frequencies must not overlap.
Only the rear speaker is controlled when using the RGC-1.
WARNING! Failure to observe these requirements may result in damage to the amplifier.
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