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Inverted Phase Preamplifiers with REL Subwoofers

I understand with use of an inverted phase preamplifier, it is necessary to transpose your speaker wire connections from positive to negative and negative to positive to correct phase.  As REL subwoofers are connected downstream with a Neutrik (high Level) connection at the speaker terminal do you have to reverse the wiring?  With normal phase Yellow and Red wires are connected to the positive terminals and the black wire is grounded on one of the the negative terminals. (3 wires total) The REL also has a phase switch (0 to 180) but is this the solution?  


puffbojie
geoffkait's avatar
geoffkait
23,365 posts
 
Thanks for clearing that up. 🙄

But, seriously, folks, so many recordings, esp. CDs, are in Reverse Polarity it might actually make more sense to keep the system in Reverse Absolute Polarity. Two wrongs make a right.
almarg's avatar
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almarg
9,670 posts
 
Whatever you do, don't reverse the sub connections such that the black (ground) wire from the sub is connected to a + output of the amp.  That can cause problems ranging from hum to damage, depending on the internal grounding configurations of the sub and the amp.

Regards,
-- Al 
oddiofyl's avatar
oddiofyl
4,029 posts
 
I flip the polarity switch on my R305... using a c-j pre that inverts
puffbojie OP
115 posts
 
Oddiofyl.  
REL claims that the correct switch position will yield a louder result whether it be a 0 or 180 when in correct phase with the rest of the set up.  Did you find that the sub was louder when you flipped the switch? Did you have the REL before you got the C-J?
mesch
3,529 posts
 
If a sub is 180 degrees out of phase with the main speakers wouldn't there be a suck-out of those bass frequencies where there is a crossover overlap?
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