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Discussion Starter · #1 ·
I have a Klipsch Promedia Ultra 5.1 subwoofer that I have connected to my new TX-NR808. I am using a 3.5mm to RCA cable going from the subwoofer pre-out to the sub.

This works, the question I have is that with just one of the rca cables plugged in (either red or white), the sub barely works, so i plug both the red and white in.

the receiver as 2 pre-outs for subs. with both red and white plug in, the sub sounds fine, but is this safe?

i am assuming that i am just doubling the signal going to the sub and that there will be no issue, i just wanted to make sure though.
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