Energized by two Electro-Harmonix 12AX7 tubes, the Tube Zipper's patented moving filter tastefully adds controlled analog harmonics to your signal. In typical EHX fashion, each control can be set over-the-edge, generating a host of novel tones.
-True bypass using a mechanical relay
-Overdrive stage allows interaction with the envelope follower for hard hitting sweeps and frequency color
-Tron mode allows the filter to sweep smoothly, following your amplitude's envelope
-Trill mode allows modulation to be added to the envelope as the filter sweeps
-Switchable up or down filter sweep directions
-Input gain boosts the signal before the filter drive
-Resonance control adjusts the Q or peak of the filter ranging up to self-oscillation
-Two Electro-Harmonix 12AX7 vacuum tubes included
-12VAC-1000 power supply included