Duncan Twin Tube Blue SFX-11 User Manual
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Duncan Twin Tube Blue SFX-11 User Manual

Two channel tube overdrive / distortion pedal
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TM
Two Channel Tube Overdrive / Distortion Pedal
Congratulations on your purchase of the Seymour Duncan
Twin Tube Blue™. You can start using your Twin Tube Blue right
away after reading the safety precautions below, and you'll
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, which will enhance your enjoyment of your
Twin Tube Blue.
SFX-11
1

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Summary of Contents for Duncan Twin Tube Blue SFX-11

  • Page 1 Two Channel Tube Overdrive / Distortion Pedal Congratulations on your purchase of the Seymour Duncan Twin Tube Blue™. You can start using your Twin Tube Blue right away after reading the safety precautions below, and you’ll 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 Blue. Most of this is common sense, but please read it anyway.

  • 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, from clean tube tone to crunch. 2 Rhythm Channel Status Indicator – When lit, it indicates that the Rhythm Channel is active or staged for activation if the unit is bypassed.

  • Page 5: Back Panel

    DC power supply or another AC supply with a different voltage value or current rating. If you lose your transformer or if it breaks, contact an authorized Seymour Duncan dealer for a replacement. As an alternative, for North America and Japan, you can order a 16 VAC/600mA transformer from Digi-Key (www.digikey.
  • Page 6 Explanation of Controls You may be wondering why the Twin Tube Blue uses a 16-volt AC transformer instead of a common 9-volt DC adaptor or even a battery. The Twin Tube Blue relies on an internal transformer to obtain the high voltage the dual triodes require. The transformer cannot work on DC voltage.

  • Page 7: Basic Operation

    Basic Operation The ¼” mono instrument cable that leaves your guitar’s jack plugs into the Twin Tube Blue’s jack marked “Input.” The cable that exits from the “Output” jack on the Twin Tube Blue goes to the next effect in the signal chain, or to the amplifier. When first activating the Twin Tube Blue, start with the Rhythm Channel Volume and Gain control knobs in the full counter-clockwise position.
  • Page 8 Basic Operation Memphis Boogie With a semi-hollow and humbuckers, you can feel the connection between guitar and tubes. You can push it just hard enough to break up, while most of your notes are clean and clear. Chicago club Dirty blues will hit your amp hard, if you’ve got the chops. This will dirty up your Strat , but you’d better hit hard and dig in if you want it ®...
  • Page 9 Explode into modded tube amp territory. No additional overdrive pedal needed with this setting. There’s enough gain on tap for searing leads and loads of sustain. strat is a registered trademark of fmic with which seymour duncan is not affiliated...
  • 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. You should see the green LED on the Rhythm channel light up. All other status indicators will be dark.

  • Page 11: Specifications

    Specifications Description – The SFX-11 is a two-channel guitar preamp employing premium subminiature type 6111 vacuum tubes. The 6111 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

    (except tubes) starting from the day this product is purchased from an Authorized Seymour Duncan Dealer. The warranty on the tubes is 90 days. We will repair or replace this product, at our option, if it fails due to faulty workmanship or materials during this period.

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