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Minimax preamp,inverted polarity question

Greetings

I'm wondering if the sub I'm running is out of phase with my main speakers.

I have a Minimax preamp that inverts polarity,my Quicksilver Mid Mono block power amps,do not invert polarity.

So,at my speakers,I'm currently running them red on black, black on the red of the speaker.

Now, I also run a B&W powered sub,I run the sub off the Minimax pre (it has two sets of outs)

Question: is my sub in phase with my main speakers.Im running it plus to plus Neg to Neg..

It would seem maybe not,seems to sound OK............??

Should I reverse the rca at the sub?????

Comments welcome

Thanks
mcgarick
herman
2,273 posts
 
Good catch, I missed that one. If it is all inverted out of the pre then you need to hook the speakers up black-black red-red so both they and the sub are being fed the same inverted polarity. That is unless you have a polarity switch on your sub and you can invert the sub with it and the speakers by hooking black-red.
mcgarick OP
277 posts
 
Everybody,thanks for the input on this..

Ok, what if I remove the woofer on the sub and switch the wires around there????

What do ya think? Would that work??

Note:
There's a Phase switch on the back, it says "0 OR 180"
I don't even know what that means..or what it does..
When I switch it, the mid bass gets bumped up,I keep it at 0
almarg's avatar
Ag insider logo xs@2x
almarg
9,670 posts
 
Yes and yes!

The 0/180 switch is undoubtedly the polarity switch function that Herman referred to in his last post, and setting that to 180 should get your sub in phase with your main speakers. If that results in excessive mid-bass, then the other settings on the sub (such as the one called "low-pass filter"), and/or placement in the room, need to be optimized.

Good luck!
-- Al
mcgarick OP
277 posts
 
Gee, all that pondering,and all I had to do was flick a switch!

Thanks,everyone
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