Erica Synths Black Double Bass is unique module that combines two transistor suboscillators (-1 and -2 octaves) and lowpass filter.
https://www.ericasynths.lv/shop/eurorack-modules/by-series/black-series/black-double-bass/
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.
Subs generator!Perfect conditions. Packed with care + quick shipping
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