Orion 425 HCCA - Page 16

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Output
Mixed mono operation using a 400 BDG Bridging Module is the approach to
use when you want to add a subwoofer to the a single amplifier system. This
mode can be used to provide more power to the subwoofer while maintaining
stereo left and right. In this system, the 400 BDG Bridging Module accepts
the stereo inputs and turns one channel over 180 degrees (inverts the channel).
Both channel outputs of the amplifier are now connected to the subwoofer
with the inverted channel being used as the negative input. This works be¬
cause the two channels are 180 degrees out-of-phase.
The left mid/high speaker is connected normally, but the connections to the
right mid/high speaker must be turned over to retain the stereo effect. This
means that the yellow lead now becomes the negative lead and the black/
yellow lead becomes the positive lead.
Figure 10. Mixed Mono Connections in a Single Stereo Amplifier System Using a 400 BDG Bridging Module
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A REMINDER: The speakers must never be grounded to the car chassis or
body. To do so will cause severe noise problems and, in the case of bridging,
cancel out the two-phase operation.
'Phantom Power' (+15V & -15V) is supplied to all
ORION accessory modules by the amplifier through the
DIN cable. (When ORION amplifiers are not used, the
ORION PPS 100 Phantom Power Supply is required.)