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Mc240 question

bre's dad

bre's dad

I drank what?!?
Just picked up a C20 (was told it was a C22 but the guy was wrong) & Mc240. Physically they're both rough but working. I have read the manual and done some googling but can't seem to find a good answer to a question I have. What is the difference between Stereo mode & twin mode? Only thing I've found is one has a higher sensitivity and in twin mode you have gain controls on each channel vs. just a balance on the stereo mode. Or did I just answer my own question?
 
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bre's dad said:
Just picked up a C20 (was told it was a C22 but the guy was wrong) & Mc240. Physically they're both rough but working. I have read the manual and done some googling but can't seem to find a good answer to a question I have. What is the difference between Stereo mode & twin mode? Only thing I've found is one has a higher sensitivity and in twin mode you have gain controls on each channel vs. just a balance on the stereo mode. Or did I just answer my own question?
Click to expand...

I think I read somewhere, probably in a thread here, that some people recommend hooking up to the twin mode so that you can adjust the preamp's volume control more into the sweet spot, by lowering the gain on the amplifier.

I have been meaning to try this myself, since I am driving Cornwalls (efficient) with my MC240, and the volume knob on my MX110 lives between 9 and 10 O'clock.
 
bre's dad said:
Just picked up a C20 (was told it was a C22 but the guy was wrong) & Mc240. Physically they're both rough but working. I have read the manual and done some googling but can't seem to find a good answer to a question I have. What is the difference between Stereo mode & twin mode? Only thing I've found is one has a higher sensitivity and in twin mode you have gain controls on each channel vs. just a balance on the stereo mode. Or did I just answer my own question?
Click to expand...
You've answered your own question. Twin mode would've been handy in a non traditional application where two separate loads could be balanced individually - ceiling speakers in two different halls for example.
 
Twin mode of a 240 allows you to change the sensitivity of the 240 from. 0.5 volts for full output to 30 volts. The stereo mode is set for 2.5 volts with a balance control.
 
I made the switch today. Using the twin inputs, with the gain turned down, and the preamp turned up.

I have an LP playing with the MX110 volume at 12 o'clock, and I like the sound. I need to do some more critical listening to be sure, but the bass quality seems better.

I have also read in some old thread, that setting things up this way allows the loudness circuit to work properly. I have yet to play with this, but I have turned down the bass knob this evening from my usual setting. A little later in the evening, and I will turn it way down and try the loudness circuit, which I have never really liked, on my MX110.
 
The 12:00 position of the controls in TWIN mode provides the same amount of gain sensitivity in STEREO mode.
 
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