I also have many other pots available. See the --------->LINK

     I have been servicing McIntosh units for a while now and as everyone may know the main issue is locating good volume controls for these units. After many years of back and forth I decided to 
re-manufacture many of  McIntosh volume controls that were used back in the days. My main goal was to produce a high quality part that is better in comparison to the original volume pot.
I am glad to announce that I succeeded. I am very happy with the result and am sure you will be too!
     Here is a new volume control for McIntosh with on/off switch on the back . This is a modern production potentiometer. An exact copy of the original pot, but much better in terms of reliability and quality.
The original on/off switch cap fits the back of this pot, so that the gray on/off switch will be covered.

WORD OF CAUTION: For those of you who are considering altering the unit (drilling holes in the faceplate/chassis for the toggle switch for a toggle switch or adding an inline  switch) I would say STOP! This alteration
will decrease the value of the unit by at least double the amount you spend on this new potentiometer. Down the road you will want to sell the unit and any alteration to
the faceplate/chassis or the cord will play a significant role in how much you can sell it for! DO NOT ALTER YOUR UNIT!!!

Specs:
Compatible with models:      MX114, MX113, MX115, MAC1900, C28, MR55, MA6100

Resistance:          800K/800K dual deck
Tap type:              Audio
Loudness tap:      400K
On/OFF switch:    can sustain up to 6A current.

Here are couple of points why one would be better off buying modern production pot for his/her McIntosh unit:

1. Many original volume controls that McInoths used came with huge design flows:
     a. Notoriously unreliable on/off switch. Experience has shown time and again that by now more than 75% of those switches have failed and the other 25% is one
          foot in the grave. Very often I have customers who tell stories of a receiver turning itself on while the power switch is in off position. The reason for this
              is the faulty switch that shorts and causes the unit to turn itself on. Now just think about it! What if one is not home when a tube receiver/amp comes
                  live! Definite fire hazard!!!
                
     b. Unmatched potentiometer.
             By now the majority of 60-year-old volume controls have deteriorated carbon resistance paths. Those must be matched and balanced because they play a huge role in
             even sound distribution.
             If a volume pot is unbalanced one speaker will sound louder than the other!
         
              
 Even if one fixes an old switch/pot, the result will be short lived due to huge flows in the design itself.

All these issues have been addressed by this volume control. These are high quality factory made potentiometers. I use these controls when restoring customers' McIntosh preamps. Only positive results and well balanced sound.
I see many posts on various forums where people are looking/asking for a good replacement.
I have a limited quantity. Will keep few for myself and help others with this hard to find pot. 
Please let me know if you have any questions.
Thank you and let's make your McIntosh sing again!!!

Returns:
If, for any reason, you do not like this pot, I would be glad to accept it back and even pay for the return shipping fee!

I also have many other pots available. See the --------->LINK