Converting Mark Levinson gear from 240V to 120V


Can anyone assist me in converting an ML 23.5 from 240 Volt to 120 Volt? I see a series of blade connections where the power wires converge with 2 jumpers. I'm sure it's a matter of moving/adding/removing these jumpers.

I also have an ML 30.5, 31.5 and 38S. These look like they have to go back to Madrigal for some surgery to make the change, but if you know how to do this, any help would be of great assistance.
hifimavin
As far as I know, most of the power transformers used in audio-gear assumed to work on both 240 and 120V. Most of them have an extra output set that even no manufacturer can get rid of. Manufacturers to hide this fact from illiterate consumer can make money without extraneous part and labor investment. Madrigal in this case can be on my "Crook list" charging $150+....
I do suspect that Madrigal speculating on these piece-of-cace issues since they largely deal with Europe and less-likely will they use different transformer.

The bottom line is that if voltage is measured accross each of output windings of power transformer at the same input AC voltage they will be different in relation of 2:1(120V terminals v.s. 240V terminals. It lies in the simple ideal transformer formula:
Vin/Vout = Nin/Nout where N is the number of solenoidal winds and V is input and output voltage respectively.

If it's just a matter of re-plugging different wires from the same transformer it can only take 10...15min depending on skills of technician.
Why not run a dedicated 240V line from your electrical box? Simpler and the equipment would probably run better anyway.
Send it to Madrigal, please. That is what they recommend (if it was safe or easy, the procedure would be in the owner's manual). Poking around in power supplies of hefty SS amps is deceptively dangerous.

Respectfully, and with no offense to anyone, I would not trust any advice on this matter unless it's from a qualified technician.
When I worked at a ML dealership I was told by the ML rep. that it was done to protect the dealers and distributers from "gray market" goods. Not to mention the safety issues. I can understand this after feeding my family by selling hifi gear. When you spend hours with someone educating them about a piece of gear and then they buy it from an overstocked dealer, it hurts. I have been out of retail for four years and don't miss it at all. I do miss many of the music and equipment nuts that I became friends with though. All in all, it was a great way to make a living.
Hifi I agree with you they should buy from you, if
you spend time teaching them,I would love to go
to a dealership where there is a salesman like you.
Unfortunately and sad, there are not that many salesman
who knows, How to treat costumer, Not trying to hijack
this thread.Agon is my best dealer.