Review:Electro Harmonix Stereo Electric Mistress

March 13th, 2009 by Andres Gallo

Stereo Electric Mistress


Like the other Electro Harmonix effects, the Stereo Electric Mistress gives musicians a huge range of gorgeous tones, in an insanely simple and intuitive package. With that said, I think the design is great. With only three knobs, many different sorts of tones can be found, and more impressively is that the quality of the tones is very warm, and far from digital.
Most of you already know that this “flanger pedal”, also includes a chorus effect. The great thing about the implementation of these, is that here both effects run in parallel. This is something that is not possible using a separate pedal for the chorus, and one for the flanger. Having the effects run in parallel means that they are both blended together creating a much warmer, yet more defined mix. Instead of having the flanger run into the chorus or vice-versa, the effects are blended together. I also believe it is the only retail pedal in the market that has this feature.
My favorite feature and the last thing I discovered about the Stereo Electric Mistress is the filter matrix knob. While knob is literally the RATE knob, it’s function changes to a filter when its position is anywhere from all the way counter clockwise to a 10 O-clock position. This filter is awesome. It will freeze the sweep of the flange in a fixed position, so you don’t get that ever changing sweep that makes a flanger a flanger. Beyond 10-Oclock, on the other hand, the knob will control the rate of the sweep. Interestingly enough, the LED will change colors in accordance to the sweep. I know my tone is about right if the LED is yellow while on filter matrix mode.
The other two knobs, as obviously labeled, serve to control the depth of the flange and chorus effects. All in all, the Stereo Electric Mistress is very simple to use, without lacking in tones. Using it in stereo especially, it sounds completely amazing. The stereo is beautiful and gives the sound lots of body as the sweep pans between the two channels.
It isn’t a perfect pedal however. I mentioned I love the stereo outputs, but it lacks a second input for stereo. This means there is no way send another pedal’s stereo signal to it.


The Electric Mistress is known for being one of the musical flangers, where most sound overwhelmingly alien-like. With lots of transparency and tonal options it is definitely a must have modulation effect. The flanger itself is that famous Mistress tone, that shimmers, and yet unlike other flangers leave your tone thick and lush. Most flangers I have tried sound very, very different, and perhaps overly metallic. The chorus effect, is very good, and lush. The sweep which can be frozen has a huge range, and its beautiful when it creates those sweet flanger shimmering harmonics. The real beauty, however, comes in when both chorus and flanger are blended together. The sound achieved this way is very unique. The sound is very liquidy, but highly defined. It nails those classic tones from David Gilmour, and The Police, which are after all know for their use of the Electric Mistress.


Construction is top notch. I don’t see this pedal breaking any time soon.

Customer Support

Electro Harmonix customer support is very good. They have always been quick to respond to my emails, and have provided me helpful answers to my questions.

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