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Product 500252

Seymour Duncan SFX-07 Shape Shifter Tap Tremolo Guitar Effects Pedal   

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You'll love the Seymour Duncan SFX-07 Shape Shifter Tremolo pedal if you like the smooth, easy-to-dial-in sound of vintage amp tremolo. But if you al...Click To Read More About This Product

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Combine that vintage-amp sound with the versatility of a modern tremolo.

You'll love the Seymour Duncan SFX-07 Shape Shifter Tremolo pedal if you like the smooth, easy-to-dial-in sound of vintage amp tremolo. But if you also crave unrestrained versatility, and you want to delve into ultra-modern experimental sounds like flutters, shimmers, warbles, and even radical "helicopter chops," the Shape Shifter is your dream tremolo.

The Shape Shifter pedal's sonically pure, 100% analog signal path delivers the familiar lush, hypnotic, pulsing tremolo vibes characteristic of '50s tube amps. Digital tap control offers incredible control. Shape and Wave controls provide unparalleled versatility.

There are two modes. In Rate mode the tremolo speed varies continuously from one to 20 cycles per second. An LED pulses in time with the tremolo effect for easy Rate setting. In Ratio mode, tapping the Tap Rate switch establishes the speed, allowing for easy synchronization of the tremolo rate and song tempo. Also, in Ratio mode, the tapped tempo can be expressed in your choice of four tap-to-note ratios: 1:1, 2:1, 3:1, or 4:1 (1/4 notes, 1/8 notes, triplets, or 1/16 notes).

The Wave control allows the tremolo effect to go from the smooth modulation of a sine wave through the sharper characteristics of a triangle wave to the abrupt on/off effect of a square wave drive.

Most classic tremolos increase the volume over a certain period of time”say, a quarter of a second”and then decrease the volume over a similar period of time, giving a smooth, even feeling to the tremolo effect. When set to the middle of its range, the Seymour Duncan Shape Shifter's Shape control does exactly that, but when the Shape control is rotated away from its center position, the relationship between the time spent increasing the volume and the time spent reducing the volume changes. For example, you can dial in one-tenth of a second of volume increase followed by four-tenths of a second of volume decrease, or vice-versa, adding a very different feel to the tremolo effect. With quick swell and a slow drop, the effect is percussive like a piano. Conversely, with a slow swell and sudden drop, the result is reminiscent of a tape played backwards.


SFX-07 Shape Shifter Tap Tremolo Guitar Effects Pedal

  • Type of Circuitry: Pure analog signal path, digital tremolo timing
    Input Impedance: 1 megohm
    Output Impedance: 1.2K ohm
    Gain: 2.5dB maximum
    Max Output before Saturation: 2.8V RMS
    S/N Ratio: 95dB
    Frequency Response: Wideband; -3dB at 3Hz and 165 kHz
    THD: 0.09% @ 1 kHz, 1VRMS
    Tremolo Characteristic: Gain variation linear in dB

    Control functionality:
    Depth: Continuously adjustable from 0 to 28dB
    Shape (Duty Cycle): Continuously adjustable from 10% to 90%
    Wave: Continuously adjustable, sine to triangle to square waves
    Rate: Continuously adjustable from one to 20 beats per second
    Tremolo Rate Controls: Speed knob, tap tempo button, and rate multiplier control

    Power: 9V battery or 9V-regulated DC adapter
    Current Consumption: 7mA operate, 3mA bypass
    Dimensions: 5-1/2" W x 2-1/5" H x 5-1/5" D
    Weight: 2 lbs.
    Chassis Material: 16 gauge steel
    Bypass: True hard-wire bypass

Review Snapshot

by PowerReviews

(based on 3 reviews)

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Reviewed by 3 customers

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(2 of 2 customers found this review helpful)


Great tremolo!


from Citrus Heights, Califonia

The Seymour Duncan SFX-07 Shape Shifter Tap Tremolo is an amazing sounding and uber easy to use tremolo. I had the Boss TR-2 years ago, but not for very long, I guess I wasn't blown away by it like I am this pedal. Search "Shape Shifter Enhancements" on youtube and check out the video from nobleamps to see some cool upgrades they offer for this pedal. The biggest drawback is that you can't tap in the tempo unless the pedal is on... Unless you cut one wire inside, then the digital brain stays on all the time. This, however, makes it so there's no LED to let you know if the pedal is on or off. I suggest you just use your ears or pay roantone.com $50 and they can fix that for you.

(1 of 1 customers found this review helpful)


Tremulate This.

By Dave

from UT

See all my reviews

I've been searching for good Tremolo pedal. I originally bought a Boss TR-2, and while it did the job it wasn't anything special. I started looking at other Tremolo pedals and taking a look at Demos. After seeing a Demo of this pedal on Youtube I was pretty much sold. I got this thing a few days ago and I am not disapointed. I've been messing around with it for 3 days now and I can't wait to use it again. The Tremolo from this pedal is very warm and its almost hard to get a setting that doesn't sound good on it. I have quite a few favorite features on this pedal.1. The tap tempo is very helpful. I hate bending down and adjusting timing.2. Both ratio and rate mode are useful. 3. I love the shape control which shapes where the volume comes in and drops off. Having control of this is awesome and you can get some really unique sounds out of the pedal.4. Size. This pedal isn't as big as I thought it would be, which is great if your conserving pedal space on your pedal board.5. Speed. You can slow this thing WAY down, or speed it way up. I don't forsee me ever wanting to adjust past the 2 extremes this pedal offers.All in all this is one of my favorite pedals. I wont be substituting it for anything else.

(0 of 1 customers found this review helpful)


Great FX but NOISY switches!

By bateriacaliente

from San Francisco, CA

See all my reviews

Sound-wise, the unit is absolutely tops. Great variety and all settings are perfectly usable. Tap works wonder, and I love the wave offsets. That said, the two switches are LOUD. I don't mean electrically, I mean mechanically, they are LOUD, clicky, switches. You won't notice live, but it may be an issue in the studio.

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