LJM L25 Clone modules

[roclite]

Just received my pair of LJM L25 clone modules from Chinese eBay seller along1986090 for my next amplifier self-build project. They look well assembled but of course I will run them up on a bench PSU/8R load first to check there are no nasty surprises. Ebay listing gives basic design specification so no problem with that, however, cant find a lot of information about them on the forum or elsewhere e.g schematics, build issues, user experiences etc. Anyone out there used these modules and have any specific feedback on sound quality? More importantly, any details of problems or issues that might prevent simple installation in an amplifier case with a +50/-50V DC power supply?

 

[ljm_ljm]

+- 50V DC IS OK。

 

[The Kid]

anyone have a schematic for this beast?

 

[The Kid]

I have smoked several of these, and before I toss them, was wondering if there is a schematic available? They seem to blow up easily by simply un-pluging the input cable? and they have 117 db of gain...when 20-25 would be plenty.

 

[David Church]

They seem to develop thermal runaway with a continous sine wave even at low levels, blowing the output transistors.

 

[frede4500]

thid amp is terrmic unstable ,to many transistors on the little alu angle ,just a bad bad design ,works fine whit other output transistors ,but never mount this amp using the useless alu angle