it is a double filter (1passe there and a high-pass) + volume input
by pedal

UTILIZATION

simple configuration with a volume over a dry filter is simple and effective

SOUND QUALITY

This pedal allows you to sculpt the sound of your instrument very finely and very simple, if you spend a little time it really improves the sound quality of the instrument ... I tested it with a Jazzbass a Squier Bass VI and Jagmaster a jetbaritone Gretsch, a Fender telecaster bass. I was able to correct minor flaws bothered me for each instrument, provide some clarity in addition to those equipped with humbucker ... my Jagmaster has transcended found I could get out of it near its a telecaster ... I got out very dub sounds of my Jazzbass

OVERALL OPINION

an excellent price-quality ratio, which would be great is the ability to adapt frequency filters for even more flexibility ...