High-quality guitar preamp with built in boost. Great for Old School Metal, New Metal, Thrash, Death and Doom.

• Uses a pair of premium, mil-spec, subminiature, USA-made Phillips-Sylvania 6205 pentode tubes.
• Two selectable boosts, 4dB and 8dB. No effect on tone, just increased level.
• Bass Control: 126 Hz, Q = 1.5, Gain = +/-12 dB
• Midrange Control: 596 Hz / 1389 Hz, Q = 1.5, Gain = +/-12 dB
• Treble Control: 2.93 KHz, Q = 1.4, Gain = +/-12 dB
• True Bypass
• Power supply: 16 V power adapter (included)
• Robust metal housing
• Dimensions: approx. 7.50 X 6.62 X 1.96 in. (19 X 16.8 X 5 cm)
• Weigth: approx. 1.43 kg
• Designed in USA

Twin Tube Mayhem SFX-04 - Modern tube distortion for peeling the paint off the walls! This high-gain companion to our Twin Tube Classic features 3-bands of active EQ (with switchable mid-range frequency), and a solo-boost channel that will enable your leads to slice through any mix. The high plate voltage and 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 pedal 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. True bypass. Heavy duty steel chassis.