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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
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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. To reduce the risk of electric shock, do not plug your Twin Tube Classic into any other type
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General Information The Twin Tube Classic is designed for years of solid performance. One of the secrets is the duet of type 6021 tubes. These sub-miniature dual triodes represent the pinnacle of tube technology advancement. The 6021s were designed and manufactured to meet the MIL-E-1 spec for reliability under conditions of severe shock, vibration and temperature. They provide extremely long service life with virtually no tendency towards microphonics (see USA Department of Defense Stand
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Explanation of Controls 3 11 2 7 1 8 6 5 4 9 10 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 – Master volume control for Rhythm Channel. Positioned at end of the gain chain, it regulates the loudness relative to the other channel and to the bypassed so
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Explanation of Controls 10 On/Bypass Selector – Selects between true bypass and whichever channel has been selected by the Channel button. 11 On/Bypass Status Indicator – When lit, it indicates that the Twin Tube Classic is engaged and operational. When dark, it indicates that the unit is in bypass mode and that the guitar signal is passing straight through unaltered. 1 2 3 Back Panel 1 Input Jack – Plug your guitar in here. 2 Output Jack – Provides the output signal. Connect to the input of
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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. The transformer cannot work on DC voltage. One alternative would be to run the tubes on low voltage in “starved plate mode.” Here, the tubes are used like a clipping diode and do not actually amplify. Though starved plate volta
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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. Then, start rotating the knobs clockwise until the desired volume level and overdrive
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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) 3-Channels of Distortion Channel #1: (Bypass mode) Amplifier set for slightly dirty rhythm tone. R h y t h m Channel #2: Twin Tube rhythm channel adds overdrive. Channel #3: Twin Tube lead channel adds higher saturation for leads. T o n e 2-Channel Set-up. (Amp is set
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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. R h y t h m T o n e vol gain bass treble L e a d vol gain 9
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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. All other status indicators will be dark. When first powered up, the Twin Tube Classic will always default to bypassed mode with the Rhythm channel staged in waiting mode. 2. Turn both Master Volumes fully dow
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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. The tubes are configured with a high-voltage power supply for maximum dynamic range. True-bypass capabilities are provided to allow uncolored feed- through. Ga
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Limited Warranty Seymour Duncan offers the original purchaser a one-year limited warranty on both labor and materials (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. Defective products should be returned to your USA dealer, international distributor, or sent direct to our f
