Quote:
Originally Posted by tdelahanty
If the amp is truly balanced the speaker output is very similar to a bridged amp. In other words the speaker red & blk. float between two amps, one pos. and one neg. A simple push/pull amp will have the blk. speaker post connected to gnd. The REL sub requires a gnd. connection, you cannot leave the blk. wire open, there will be hum and/or low gain.
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The video I posted is from REL. They tell you to tape over the ground and leave it off. It should be floating for differential amps.