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Envelope filter...

The Haztron III+ is a very good filter...just not quite as quacky as the original. Someone needs to post samples of MuIII & Haztron and see it if anyone can pick out what's what.

It is very good indeed! better than Qtron+ or FM4 imho but sounds "thinner" than the proton (sorry for lack of better words... maybe a different filter slope or speed of envelop?), is huge, heavy, not compatible with standard 9v boss power supply, and has these big pads underneath (yeah I never tried to pull these out) that make it difficult to scratch on a pedalboard. I have some volume drop with mine also... never tried an original Mutron III+.
 
bbe said:
I'm big on the Pigtronix Envelope Phaser. It can do such a funky envelop sound, it's like no other pedal I've ever played.

And when I need something a little more subtle, I've got a Boomstick Bottom Feeder, which I don't believe is produced anymore, that does a great job. From my understand, it's based off the DOD circuit.

I think the boom stick bottom feeder is now the mojo hand analogue filter
 
I just got a Micro Q-tron yesterday. It's definitely the wettest sounding filter I've owned so far. I've owned a MXR BEF, Emma DiscomBOBulator, EP-1 and an SYB-5 so far. All fun pedals but not for me in the end. I'm gonna order a Source Audio one of these days and I've been thinking of ordering the Music PCB's Meatsphere. It's too bad that a lot of filter pedals out there cost close to 300 dollars. I'd love to try a Fatman, Moog etc, but too spendy.
 
It is very good indeed! better than Qtron+ or FM4 imho but sounds "thinner" than the proton (sorry for lack of better words... maybe a different filter slope or speed of envelop?), is huge, heavy, not compatible with standard 9v boss power supply, and has these big pads underneath (yeah I never tried to pull these out) that make it difficult to scratch on a pedalboard. I have some volume drop with mine also... never tried an original Mutron III+.

That's funny, I feel my HazTron has a bit of an overall volume boost, but it's pretty well behaved level-wise. A mellow filter setting can make you fall back further in the mix though.

It is huge, the input/output jacks are reversed, and it needs it's own 18v wallwart. All definite negatives. But I was able to stick velcro pads onto the 4 feet and it's snug on my pedalboard.

The original by Musitronics is just "MuTron III" - no "+".

I also like the Qtron+ as I find there are certain sounds it does better, like wet "down" sound only on the high-end. Plus I really like the effect loop to put dirt and an octaver into without changing the input dynamics. Still, the Qtron+ is not currently on my board, but hopefully soon it will be. I agree that for a general-purpose filter the HazTron III+ is better than the Qtron+.
 
Filters I've owned:
-EHX Old Box Q-Tron+
-EHX QBalls Enigma
-WMD SuperFatMan
-Subdecay Prometheus
-Chunk Systems Agent 00Funk MKII
-Pigtronix EP-1
-Pigtronix EP-2
-Guyatone BR-2
-3Leaf Audio Groove Regulator V1
-3Leaf Audio Proton
-EBS BassIQ
-Barge Concepts Grinder MB-1
-IE Xerograph Deluxe

My barge grinder still tops my list easily. The xero dlx is the only other filter I have now, although I'm thinking about revisiting a qballs.
 
I own a Moog MF-101, which is the famous Moog 24dB/oct ladder filter in a box. It's pretty kickass if you want a LPF fat wobble that moves a lot of air... almost dubstep-like with my B:assmaster in front of it. I also like it cause you can use it in many ways... Envelope, Pure resonance drone, LPF shaping, etc.

Although, if you're looking for a Bootsy-ish ''quack'' (very resonant and wet)... I would take a look at the Prometheus or Mutron.
 
guys can you also post the bass you are using and your bass amp? i think filters have a different response to certain basses. Just for reference though. thanks! :)
I'm using SA BEF and MuTron III+, and soon my Q-Tron+ as well, with a Spector Czech-made bass (actually an older SSD, which was Spector's brand for a brief while), into either an Eden Metro, a Mesa Basis M2000, or a Genz Benz ShuttleMax 9.2. The Genz is my main amp now, and I'm trying to sell the Mesa; I'll keep the Eden as my practice amp.

I find the bass input has a lot more to do with how a filter sounds than the amp, but I tend to EQ the same sort of tones into all of my amps- a somewhat dark tone that I can dub out with the tone control on the bass, but that never gets extremely bright. So I tend to prefer filters with a pretty sharp resonant squawk and a bit of a volume boost- now the SA BEF has no volume boost, but is working so far. The Genz is nice because the footswitchable filters do allow me to pop on a nice treble boost for funk playing.
 
Another vote for the Haz Mutron III. I have tried a bunch of envelope filters and this is my favorite. Really warm and oganic sounding and not too quacky. Yep the pedal is the size of an airplane carrier and it's almost as expensive as one but tonally it really gets my juice going.

I also the new MXR Bass Enveloppe Filter. That pedal is plug and play and it's very small. It can get a little quacky at times but it's a very good pedal. The older version the MXR Auto Q Bass is also a very nice pedal capable of some really pretty bubbly tones.

Last idea, the Dunlop Bass Wah is a hoot. I would love to see it in another color than hospital white but aside from this it's great.