Kind time Rob Morse.
I look for an electric schematic of the subwoofer Velodyne SPL-800 Ultra (Optimum-8 or similar),ie D-class amplifier.
After 2 years of operation, the sound disappeared. Subwoofer all commands from the remote control understands. LED display works.
The supply voltage on PCB is (+-150V +-15V, 5V and 3.3V).
I read - is faulty MOSFET amplifier (I am electronics engineer).
IRFP450 MOSFETs (6 pcs) do not have the a short circuit. Visible damages on pcb aren't present.
Service, unfortunately, to my emails not responding.
If you can help me, I will be very grateful to you.
Thanks In Advance.