Hi all - I recently purchased a couple of mono class A SE solid state amps that were someone's old project, seemingly from an estate sale via an electronics dealer..
I thought this might be the best place to try and find any info on their design and if anyone recognises them from a thread on here..
There is reported some problems with them with the error light coming on and an impedance light coming on - I'm hoping the guy selling just didnt use them correctly, maybe over loading the inputs if these are for older, quieter line levels... I'll find out. According to the previous owner's family, they were in use with some large speakers in the past.
Photos attached.
I thought this might be the best place to try and find any info on their design and if anyone recognises them from a thread on here..
There is reported some problems with them with the error light coming on and an impedance light coming on - I'm hoping the guy selling just didnt use them correctly, maybe over loading the inputs if these are for older, quieter line levels... I'll find out. According to the previous owner's family, they were in use with some large speakers in the past.
Photos attached.
Attachments
![s-l1600[1].jpg](/community/data/attachments/1026/1026033-72c1877e079afcf11a60989adf73740a.jpg?hash=csGHfgea_P)
![s-l1600[1].jpg](/community/data/attachments/1026/1026034-8d59d0dee2123fed00761442eae9985a.jpg?hash=jVnQ3uISP-)
![s-l1600[1].jpg](/community/data/attachments/1026/1026035-fd54250a8984778ccecf80451855360c.jpg?hash=_VQlComEd4)
A key to turn it on! Never seen a current display on the front panel like that though. I suspect the protection circuitry might be an add on and is misbehaving as its made on veroboard. You'd need pictures of the power amp section to find out what the design is.