SEM-style DIY filter
http://www.thonk.co.uk/shop/humpback/
If you had an Unicorn Account you could see a chart with the price development of this module and the average price asked for this module.
This God's Box Humpback Filter is like new.
I created a jumper wire which takes the "naughty/nice" control to the front panel (you'll have to find your own mounting position). You could connect the wire to either a switch or a 1 MOhm pot to let you move from low-resonance to high-resonance mode.
The Humpback is built using the polystyrene caps for the authentic Humpback sound!
no warranty
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