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connecting mono amps to pre amp

Newbie here. I'm 56 and this past year and a half, I've  gotten back into 2 channel. Various amps/pre amps and receivers. I would like to know how to properly connect (2) Mcintosh 2120's to a Mcintosh MA 6100. Have several mac pieces as well as others. But seems Mac is kind of like BMW/Mercedes -European cars with the fact of over engineering or over features, for a lack of better words. Can someone shed some light here with regards to the MONO bloc connection on these? Thank You in advance!!

2channeladdicted

Showing 2 responses by tls49

tls49's avatar
tls49
1,351 posts
 
In addition to Al’s comment and hopefully he will verify or correct if I am not.

After looking at the MC2120 manual here,

http://www.berners.ch/McIntosh/Downloads/MC2120_own.pdf

You actually connect the speaker to the left channel output of the 2120 for mono operation. Negative of the speaker to the "COM" terminal on the amp and positive of the speaker to the appropriate impedance number tap with a jumper from that tap to the same impedance number tap on the right channel output.

tls49's avatar
tls49
1,351 posts
 
"then you would bridge the common/negative on the speaker terminals"

No, use "COM" terminal on left channel output to speaker negative, then if your speaker is 8 ohms, connect "16" terminal on left channel to speaker positive. Also, connect a jumper from "16" terminal on the left channel to the "16" terminal on the right channel.

Not sure why manual shows 2 speakers connected in mono operation, however I’m reading the instructions for my comment.
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