this needs some kind of minor repair at the moment .
if you're handy with soldering and electronics you can likely fix it .
i've had this for almost 20 years but have not used it in the last 15 years .
used it to amplify a piezo pickup in an acoustic bass .
about as simple a sit gets. one knob . input & output jack.
9 volt battery inside .
$20 - i will pay shipping .
baytoven@mac.com for paypal