2. amps-preamps
  3. 164955-27965

Speaker terminal polarity

I just unpacked my Cary 300B-SE mono blocks after being in storage for over 15 years.  Both speaker outputs (on each amp) look identical (not color coded) and neither is labeled + or -. I tried a continuity test against the amp chassis and both terminals read the same. How do I determine + from -?  Does it matter as long as I have each amp wired to its corresponding speaker the same way?

I must have asked this question when I got the amps 17 years ago, but can't locate the thread.  Standing by with red and black sharpie pens if necessary.

jamesddurkin

Showing 1 response by p05129

p05129
529 posts
 
MC to the rescue again with wrong info. If you don’t know which terminals are plus and minus on the amp and you are using 2 speakers, you have a chance of reversed polarity of 1 of the speakers and this will cause a significant effect. 
You can’t assume by looking at your amp that the positive terminal is going to be at the same place on the opposite side of the amp. Call Cary or look for your amp online to see which terminals are positive and negative.
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