Orion 7005 Owner's Manual page 12

Three Channel Bridged Stereo Configuration
Front and rear channels are configured for bridged two-channel operation
Lowest recommended impedance for both front and rear channels is 4W
Crossover and gain configurations are independently adjustable between the
front, rear, and subwoofer channels.
Two-channel operation is recommended for this operational mode.
Front and rear outputs can be configured for high-pass, low-pass, band-pass, or
full range operation.
Front and rear outputs can be configured for stereo (right channels will have right
output, left channels will have left output) or summed two-channel operation
(front speaker bridged, rear speaker bridged).
Lowest recommended impedance for the subwoofer channel is 2W.
The subwoofer channel can use internal or external input. If the source unit has a
separate subwoofer out, use the external input configuration.
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©2003 Directed Electronics, Inc.