Legendary Polivoks VCF for Your Tabletop The Russian-made Polivoks duophonic, analog synthesizer is renowned in esoteric synth circles for its austere aesthetics and grimy synth growl, which derives from its unique and characterful voltage-controlled filter. Now, Latvian Eurorack pioneers, Erica Synths, have emancipated the Polivoks filter and placed it into the Acidbox III tabletop module, with all the Soviet-era swagger intact. Combining a switchable lowpass/bandpass resonant filter, LFO, envelope follower, and divider, Acidbox III injects life and movement into any signal that passes through it. With left-right inputs and outputs, it can process stereo signals or add instant width and dimension to a mono source. And if you want to get a little gnarly, drive the input for intense grit and saturation. At first blush, AcidBox III seems like it's just for synth heads. But, GearNuts's guitarists and bassists are equally excited about its tonal possibilities and dropping it in