Here we have a used EHX Micro QTron! A handy fixed filter good for gettin' funky.
This unit has been tested for functionality and works as it should. No accessories included unless otherwise noted.

From EHX:
The EHX Micro Q-Tron is a smooth envelope filter with a funky wah-wah tone. The filter is controlled by its internal envelope follower, analyzing the volume of your notes and the dynamics of your playing to directly sweep the filter’s center or cutoff frequency. A stronger attack or louder note will produce a wider frequency sweep while softer playing produces more subtle effects. Use the Q control to make the effect more dramatic.
-True bypass
-Drive control sets sensitivity and filter sweep range
-Selectable low pass, band pass or high pass filters
-Q control sets the filter’s bandwidth from smooth to funky
-Tough and compact die-cast chassis
-9V battery included

Every instrument we sell has been professionally checked over and setup by our in-house technician to ensure optimal playability. We pack each order with care and ship promptly.

Mill River Music is a full-service shop in Western Massachusetts, proudly offering new, used, and vintage gear, plus repairs, and friendly advice. Reach out at (413) 505-0129 or with any questions!

International buyers are welcome — please message us for an accurate shipping quote before purchase.