Seymour Duncan SFX-04 Twin Tube

High-quality guitar preamp with built in boost. Uses a duet of premium, mil-spec, subminiature, USA-made Phillips-Sylvania 62051 pentode tubes. Great for old school metal, new metal, thrash, death and doom.

The high plate voltage and 100% vacuum tube signal path allow the tubes to operate at their fullest potential and provide maximum dynamic range. Additional gain is achieved with a high voltage, low noise, discrete Class A input stage. The solid state input stage increases the resistance of the stomp-box to microphonics. The result is maximum dynamic range, the most gain, and the heaviest tone your expect from a great tube preamp voiced for metal. Also features user-selectable 4dB or 8dB boost for pre-setting rhythm and lead levels.

Features: Gain: • Before Level Compensation – 97 dB • After Level Compensation – 71 dB Gain measured at 1 KHz Nominal Output Level – 0.25 Vrms (-10dBu) Nom. Output level measured with 100mV 1 KHz input signal and all controls set to 12 o'clock Max. output level before clipping – 5 Vrms (16dBu) *ax. output measured with gain set at 50% and all other controls set full up and boost footswitch set to 8dB Input Impedance: 100KOhm THD @ 100mV RMS output – .5% Noise @ Output – 4mV (

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