This item is used, has been fully tested and is guaranteed to be working. TB-303 Clone-ish Filter Module

The 3003 filter is a voltage controlled, discrete analog 18 db/oct ladder low-pass filter, employing hand-matched transistors. Drop the FREQUENCY knob to 0 and things get pretty dull; swing it back up and those "Transistor Bass” highs come crashing through the gate. The 3003's RESONANCE circuit at max will sing out more than the TB's signature chirping in a fun, bubbly, if washy, poorer relation, Mini “clone-ish" way; use it tastefully, or throw moderation to the wind for overwhelming chirp force.

The 3003 filter has the most gentle sonic touch of its partners in the Boomstar fold, but nevertheless is quite capable of shaping precise, very dynamic tone. Whether or not this STUDIO ELECTRONICS filter is filling its traditional baseline boxing niche, driving a harsh, liquid, acid-like tone, a softer more rubber-bandy SH-101-ish voice, or out of the bass range altogether, leading the way, all is within easy reach of this surprisingly warm and versatile VCF. The 3003 can be distinctly vocal at times, especially when one is willing to put grittier, more distorted desires aside.

In the Box
• The module itself
• Eurorack Power Cable