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Can I convert stereo to mono for a phono input

My preamp doesn't have a switch to convert stereo to mono.  I would like to switch a stereo signal to mono to set my cartridge azimuth (when using two channels out of phase, this method allows accurate balancing of the channels).  Is there a way to build a simple converter: two RCA female plugs taking a stereo signal and mixing it to mono, output as two RCA male plugs (mono signal)?


I have a test LP that provides a stereo track (test signal) with the two sides out of phase.  All I would need to do is feed that through the mono converter to set my azimuth. 

Thanks for any advice.  Peter

peter_s

Showing 2 responses by cleeds

cleeds
6,115 posts
 
peter_s
My immediate goal is to get equal output out of both channels.
I agree with @lewm Uneven channel balance is not necessarily something that can or should be corrected by altering alignment.
cleeds
6,115 posts
 
peter_s
If not - hmmm - what ARE the other options
First, I'd make certain the imbalance is in the phono cartridge and not in the phono stage itself. No cartridge is perfect, but a good cartridge really shouldn't have an audible channel imbalance, imo. If it were a new cartridge, I'd return it to the dealer. The only other solution is to just replace the cartridge or use the preamp's balance control.
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