Duncan Twin Tube Classic SFX-03 Quick Manual
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Duncan Twin Tube Classic SFX-03 Quick Manual

Two channel tube overdrive / distortion pedal
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Two Channel Tube Overdrive / Distortion Pedal
Congratulations on your purchase of the Seymour Duncan SFX-03
Twin Tube Classic™. You can start using your Twin Tube Classic right
away after reading the safety precautions on the next page, and
youʼll immediately enjoy the versatility of having two channels of
gain and a wide range of great tones. However, you might want
to read through these instructions in their entirety first, to gain
valuable information, that will enhance your enjoyment of your
Twin Tube Classic.
SFX-03
1

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Summary of Contents for Duncan Twin Tube Classic SFX-03

  • Page 1 Two Channel Tube Overdrive / Distortion Pedal Congratulations on your purchase of the Seymour Duncan SFX-03 Twin Tube Classic™. You can start using your Twin Tube Classic right away after reading the safety precautions on the next page, and youʼll immediately enjoy the versatility of having two channels of gain and a wide range of great tones.

  • Page 2: Safety Precautions

    Safety Precautions Hazardous voltages are present. For your protection, and to reduce the risk of electric shock and danger to personal health, please observe the following safety precautions when setting up and using your Twin Tube Classic. Most of this is common sense, but please read it anyway. Your Twin Tube Classic is designed to work with typical power systems utilizing a three-prong outlet.

  • Page 3: General Information

    (e.g., exhibiting erratically fluctuating signal levels, spurious increases in noise, sputtering, low-level whistling, extreme loss in frequency response), contact Seymour Duncan or your favorite authorized Seymour Duncan dealer for your options. Do not try changing the tubes yourself.

  • Page 4: Explanation Of Controls

    Explanation of Controls Top Panel 1 Rhythm Gain – Inter-stage gain control for the Rhythm Channel. Provides varying degrees of overdrive and saturation. 2 Rhythm Channel Status Indicator – When lit, it indicates that the Rhythm Channel is active or staged for activation if the unit is bypassed. 3 Rhythm Volume –...
  • Page 5 1. North America: 120 Volt/60Hz – Digi-Key part # MT7123-ND 2. Europe and Asia: 230 Volt/50Hz – Seymour Duncan part # 352301-230 (no known off-the-shelf replacements available) 3. Japan Only: 100 Volt/50Hz – Digi-Key part # MT7127-ND (note: this transformer...
  • Page 6 Explanation of Controls You may be wondering why the Twin Tube Classic uses a 16-volt AC transformer instead of a common 9-volt DC adaptor or even a battery. The Twin Tube Classic relies on an internal transformer to obtain the high voltage the dual triodes require.

  • Page 7: Basic Operation

    Basic Operation The ¼” mono instrument cable that leaves your guitarʼs jack plugs into the Twin Tube Classicʼs jack marked “Input.” The cable that exits from the “Output” jack on the Twin Tube Classic goes to the next effect in the signal chain, or to the amplifier. When first activating the Twin Tube Classic, start with the Rhythm Channel Volume and Gain control knobs in the full counter-clockwise position.
  • Page 8 Basic Operation Hard Rock Tone Three-Channel Setup Channel #1: (Bypass mode) Amplifierʼs clean tone. Channel #2: Twin Tube Classic rhythm channel (dirty rhythm tone) Channel #3: Twin Tube Classic lead channel (dirty lead tone) Rhythm Tone gain bass treble Lead gain Three Channels of Distortion Channel #1: (Bypass mode) Amplifier set for slightly dirty rhythm tone.
  • Page 9 Basic Operation Two-Channel Setup (Amp is set clean) Channel #1: Twin Tube Classic rhythm channel set for clean tone. Channel #2: Twin Tube Classic lead channel set for moderate distortion. Rhythm Tone gain Lead bass treble gain...
  • Page 10 Detailed Step-By-Step Instructions 1. Plug in the cable of the provided 16 VAC power supply to the distortion box then plug the “wall wart” end into a 120V wall outlet or power strip (or voltage applicable for your country). You should see the green LED on the Rhythm channel light up.

  • Page 11: Specifications

    Specifications Description – The SFX-03 is a two-channel guitar preamp employing premium subminiature type 6021 vacuum tubes. The 6021 is manufactured to meet the stringent MIL-E-1 specification for reliability and is optimized to provide long service life under conditions of severe shock, vibration, high temperature, and high altitude.

  • Page 12: Limited Warranty

    (worn pain, scratches, etc.) are not covered by this warranty. Seymour Duncan reserves the right to be the sole arbiter as to the misuse or abuse of this product. Seymour Duncan assumes no liability for any incidental or consequential damages, which may result from the failure of this product.

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Twin tube classic

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