It is a JFET based high impedance microphone's and guitars pre-amplifier. It has one LED and a toggle switch.
One Output.
Three input 1/4 audio jack etc.
It has a simple RC filter circuit built in for the low noise performance. The RC filter is STP-RCF-446-LX.
It was created for a semi-acoustic guitar and it was tested and reported to work 100% OK.
(All of three pieces were sold.)
It was sold at 24th of Feb 2014. It has no warrant.
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