If connecting 2 RELs, connect the black wire of each REL to a ground lug or chassis screw on each amplifier; twist together the red and yellow wires of each REL separately and connect each pair to the positive speaker terminal of the corresponding amplifier channel. In some instances, this will result in exceptionally high gain (output) from the RELs. If it seems simply too high in gain, please remove either the red or yellow wire from the twisted pair. This will reduce output by half and restore a natural dynamic.
Note: You connect your left and right main speakers to the same terminals on your receiver or amplifier as the REL high level connection.
What about connecting stereo with a class D? I am thinking of getting a pair of HT/1003 with a Cyrus One (2021 purchased).
Andrew, did you ever get a response on this post? I too am considering two Rel t7x subs in stereo pair for a 4.2.2 system with an ATI class D amplifier. I can do LFE from my processor but the high level connection is a mystery.
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