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Seymour Duncan SFX-02 Tweak Fuzz Pedal  

Product #159340

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Item Note:

This product has been discontinued but may be available as a Open Box item.

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Seymour Duncan

Roll-your-own fuzz tone.

SFX-02 Tweak Fuzz
Tweak Control
Engages one of six pre-set EQ resonances that give an overall "flavor" to the Tweak Fuzz, rolling off the bottom end and influencing the behavior of the Gain control. Each of the six frequencies was chosen and voiced to enhance rich harmonics and bring out the most flattering qualities of your guitar or bass. Gain Control
Controls the amount of square wave clipping distortion. It can go from mildly distorted to all-out fuzz fury. Volume Control
Sets the overall volume to the optimum level. Whether you want to set it to match the bypassed signal or whether you want a big boost when you engage your Tweak Fuzz: it's your decision. True Bypass
Removes the circuit from your guitar's signal chain, allowing your guitar's signal pass through the Tweak Fuzz without affecting your tone or gain. Power Source
Standard 9-volt battery or regulated 9V DC power supply. Versatile
The Tweak feature allows you to voice the box to your tone preference. Works with guitar or bass. It works especially well with non-master volume amps. Durable
Heavy-duty 1.6 mm steel sheet metal means this unit is built to be stomped.


  • Rich, vintage fuzz tone
  • Tweak knob re-voices the tone with 6 preset EQ resonances
  • Gain, Volume, and Tweak knobs
  • Class A, low-noise transistor circuit
  • 1.6mm steel construction
  • DC 9V battery or regulated 9-12V DC adapter power

SFX-02 Tweak Fuzz Pedal Specifications:

  • "0": Resonance is not affected
  • "1": Resonance shift down 2-3kHz
  • "2": Resonance shifts down 3-5kHz
  • Bypass: True bypass
  • Chassis material: Heavy duty 1.6 mm steel
  • Current consumption: 3.5mA @ 9V (when LED is "on"), 1.5mA @ 9V (when LED is "off")
  • Dimensions: 2.5" x 5" x 2" (W x L x H) (6.35cm x 12.7cm x 5.08 cm)
  • Distortion: < 0.1%
    Gain range: 6 to 25 dB
  • Input impedance: 500K (when effect is "on"), Open (when effect is "off")
  • Noise: -120 dBV (referred to input with gain set at 25dB)
  • Output impedance: 5K ohms
  • Pickup Resonance Switch: Makes a single coil sound like a vintage humbucker ("1") or high output humbucker ("2").
  • Power: DC 9-12 V battery, or regulated DC adapter
  • Type of circuitry: Fully discrete, class A
  • Weight: 0.8 lb. Without battery, 0.9 lb. With battery
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by PowerReviews
Seymour DuncanSFX-02 Tweak Fuzz Pedal

(based on 1 review)

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Reviewed by 1 customer

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(15 of 28 customers found this review helpful)


Plenty of Range


from Los Angeles

Comments about Seymour Duncan SFX-02 Tweak Fuzz Pedal:

This pedal is one excellant deal. It provides the most range, and best tones out of any fuzz boxes I have played. It can go from everywhere from thin twangy sounds, to full, thick, and juicy fuzz balls. It is built like a tank.

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