[augustwest]

Schematic for SinglePower MPX3?
 
Does anyone have basic schematic for a SinglePower MPX3? My MPX3 had the usual transformer failure last week. I currently have a amp tech who will replace the it with a more robust one.
 
While he has it apart, I asked that he install a “gain reduction” toggle switch to occupy the hole that was previously used for the “high power” switch that is being removed. To make this request easier, he ask if I could come up with a basic schematic for the amp. I said I would give it a try. . . . . So does anyone have, or know where I can get the schematic for this amp?
 
Thanks in advance.
 
 

 

[matanoosh]

Following up on this ancient post; I also need schematics for this amp. Anyone?

 

[KenJKM]

I too am in need of the SinglePower audio MPX3-rev B.
this units Transformer leads were all removed and hanging out of the transformer. What is the wattage rating of R54? I have a burnt spot on the board where there was R54 but there in nothing there now. Id like to replace it but all i know is it should be 300 ohms. How many whats? r55 and r57 look to be 10 watts R54 burt spot is about 1 insh long only in the center of a 3 inch box painted on the board. The smaller resistor may of been put there by a newbee. unknown. transformer leads are all removed from where ever they attach. Sure could use help here. Pictures of what is correct locations for xformer wires would be a great starter. MANY THANKS for any Help Ken

 

[hobbr]

You may want to try here first, KenJKM and anyone else in the future: https://www.head-fi.org/threads/supra-schematic.436281/
The Supra and MPX3 are supposedly similar. I received mine as a gift, one channel was out. Fast forward seven years and I finally found a local shop with the chops to rewire her from scratch. $250 USD later and I have a beautiful amp I'm listening to right now about to dump some solid state amps and just main this for the rest of my life. :]
According to the shop it was a complete cluster**** inside but had more than a few upgrades from Mikhail.