I mainly play passive basses, but that doesn't mean I'm against anything active as a concept, I even played only active ones up to say 13 years ago... ... anyway, yesterday I was playing around with a amp-sim plugin which has a full-parametric section inbuilt (it's the JTS Bassforge Rex Brown, by the way) and I saw how effective can be the use of the LPF (which has a fixed quite gentle slant, in that case) to control the high content of your tone and get finger definition/honky "a-la-Jaco" tone or find where you start to get too much fret noise, etc, as opposed to relying on the passive onboard tone knob and fixed cap. value. Yet, it still retains that sort of "organic" tone and immediate interaction you get with a passive tone control with more precision and without risking to get strange spikes/notches which can happen with traditional band EQs. I did a search here and I found this from a user, which is a rather close but more complex design: The Passinwind Open Source Preamp I was wondering: is there any commercially existing onboard tone option featuring a one-knob LPF as tone control? Would it be something very few people would take into account? Do you think that a passive multi-cap varitone would be a better option for this idea?