Purchased this 4-way headphone amplifier in May-2019.
It will be mounted in the back corner of my ‘Soundboard’ – getting the required 12 volts DC from the PowerSonic battery.
However – this unit doesn’t have a power switch…!
So I opened up the case, unsoldered the rear DC power plug from the circuit board. The back pin was then bent upwards. I had another spare toggle switch, so one wire got soldered to the bent pin, the other wire was soldered into the hole left on the PCB.
A hole was then drilled into case to hold the switch. Power is OFF.
Power is ON.
Project is done…