Mojo Hand Wonder Filter

Matt Dean

Supporting Member
Jan 2, 2007
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Check this out filter freaks... anyone try one yet? I'll let someone else start the comments about the name.

Wonder Filter | Mojo Hand Fx

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Very interesting feature set. I wonder if "Gain" is true gain like on the original Mu-Tron III, and not just sensitivity.

From the description on the product page, I found this interesting:
"...in addition to the Band Pass, High Pass and Low Pass settings, we have added a Notch Filter as well as a No Filter setting offering preamp stand-alone boost capability."

I also wonder if "Boost" is boost only, or will it allow you to achieve unity gain, whether that means reducing or increasing volume. I hope it's volume control instead of just boost, since many envelope filters (especially the aggressive ones, which are usually my favorites) boost signal anyway.
 
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Very interesting feature set. I wonder if "Gain" is true gain like on the original Mu-Tron III, and not just sensitivity.

From the description on the product page, I found this interesting:
"...in addition to the Band Pass, High Pass and Low Pass settings, we have added a Notch Filter as well as a No Filter setting offering preamp stand-alone boost capability."

I also wonder if "Boost" is boost only, or will it allow you to achieve unity gain, whether that means reducing or increasing volume. I hope it's volume control instead of just boost, since many envelope filters (especially the aggressive ones, which are usually my favorites) boost signal anyway.
The gain control adjusts both sensitivity of the envelope as well as the level of the signal going into the filter circuit, so in essence it does both of what you are asking here.

The Boost is not a volume control, it is a post-filter boost of the signal coming out of the effect, so when used in conjunction with the gain control, it should allow you to achieve unity gain. Getting a unity gain will depend on your gain setting, though, as we do have a lot of headroom on the gain control such that it can allow you to overdrive the filter.
 
The gain control adjusts both sensitivity of the envelope as well as the level of the signal going into the filter circuit, so in essence it does both of what you are asking here.

The Boost is not a volume control, it is a post-filter boost of the signal coming out of the effect, so when used in conjunction with the gain control, it should allow you to achieve unity gain. Getting a unity gain will depend on your gain setting, though, as we do have a lot of headroom on the gain control such that it can allow you to overdrive the filter.
Excellent. Thanks for the quick response and helpful info!

I really like the fact that the pedal has some drive to it. I dig a mean-sounding filter!
 
The gain control adjusts both sensitivity of the envelope as well as the level of the signal going into the filter circuit, so in essence it does both of what you are asking here.

The Boost is not a volume control, it is a post-filter boost of the signal coming out of the effect, so when used in conjunction with the gain control, it should allow you to achieve unity gain. Getting a unity gain will depend on your gain setting, though, as we do have a lot of headroom on the gain control such that it can allow you to overdrive the filter.
Love to hear some bass demos. I like the 70's Mutronesque retro look of the pedal.
 
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I'm hoping this is a true alternative to the original Mu-Tron III or the Beigel Tru-Tron 3x, which are both way out of my price range. I've had enough of envelope filters which may be very good, but suffer from trying too hard to be just right, "can't make a bad sound" pedals. Give me an envelope filter with plenty of range and grit, and I'll decide what's far enough!
 
I was lucky enough to get one of these barely used on eBay for just over $100. Here are my impressions:

It does the classic up and down sweeps very well, but not as well as my favorite envelope filters. Where it truly shines is with the sweep toggle in Up position, the Gain knob around 3:00, and the Attack knob around 9:00 (the Gain and Attack controls are VERY interactive). For some reason, this setting sounds like an up/down hybrid sweep - better and more natural than any up/down sweep pedal combo I've ever tried, and I've tried a ton of combinations with excellent results. This setting alone is worth the price. I kept hearing what sounded like a down sweep in the demos, even though the toggle was in Up mode. I don't know how the Wonder Filter does it, but I love it!

It's also great to have the Boost control for unity gain, and the Mix is effective, although I personally prefer a nice, fat low pass, which the Wonder Filter does quite well. I was hoping that the Notch and 0 Filter modes would provide some tone-shaping magic (or "mojo"), because I love using filters as tone shapers, but I didn't get anything special out of them.

That unique, great-sounding up/down sweep sound in one pedal makes it a keeper for me.
 
I was lucky enough to get one of these barely used on eBay for just over $100. Here are my impressions:

It does the classic up and down sweeps very well, but not as well as my favorite envelope filters. Where it truly shines is with the sweep toggle in Up position, the Gain knob around 3:00, and the Attack knob around 9:00 (the Gain and Attack controls are VERY interactive). For some reason, this setting sounds like an up/down hybrid sweep - better and more natural than any up/down sweep pedal combo I've ever tried, and I've tried a ton of combinations with excellent results. This setting alone is worth the price. I kept hearing what sounded like a down sweep in the demos, even though the toggle was in Up mode. I don't know how the Wonder Filter does it, but I love it!

It's also great to have the Boost control for unity gain, and the Mix is effective, although I personally prefer a nice, fat low pass, which the Wonder Filter does quite well. I was hoping that the Notch and 0 Filter modes would provide some tone-shaping magic (or "mojo"), because I love using filters as tone shapers, but I didn't get anything special out of them.

That unique, great-sounding up/down sweep sound in one pedal makes it a keeper for me.
Sounds like you got a great deal there! Never come across one of these yet over in the UK.
 
I've had enough of envelope filters which may be very good, but suffer from trying too hard to be just right, "can't make a bad sound" pedals. Give me an envelope filter with plenty of range and grit, and I'll decide what's far enough!

This times ten. Anytime I read reviews touting a filter's simplicity and lack of knobs as the primary selling point, I struggle to go any further. I want options to tweak and manipulate the filter like crazy.

I actually liked the Aggie FT as a rare example of a well executed filter with limited, fool-proof parameters. That said, I sold it because of those limits. I may settle on one or two go-to sounds with a given filter, but I want to be able to squeeze some weirdness out when I sit down with it.