SFX-04 Twin Tube Mayhem

The Seymour Duncan SFX-04 Twin Tube Mayhem is a high-quality guitar preamp with a built-in boost, designed to deliver a wide range of tones suitable for various musical styles, with a focus on metal. The pedal features a pair of premium, mil-spec, subminiature, USA-made Phillips-Sylvania 62051 pentode tubes, allowing the tubes to operate at their full potential and provide maximum tonal flexibility.

Specifications:
- Gain: Before Level Compensation - 97 dB, After Level Compensation - 71 dB (measured at 1 KHz)
- Nominal Output Level: 0.25 Vrms (-10dBu) (measured with 100mV 1 KHz input signal and all controls set to 12 o'clock)
- Max. Output Level before clipping: 5 Vrms (16dBu) (measured with gain set at 50% and all other controls set full up and boost footswitch set to 8dB)
- Input Impedance: 100K ohms
- THD @ 100mV RMS output: 0.5%
- Noise @ Output: 4mV (< 3dB hum content)
- Boost Footswitch Gain: Two selectable boosts, 4dB and 8dB, with no effect on tone, just increased level
- Active Equalization Section:
- Bass Control: 126 Hz, Q = 1.5, Gain = ±12dB
- Midrange Control: 596 Hz / 1389 Hz, Q = 1.5, Gain = ±12dB
- Treble Control: 2.93 KHz, Q = 1.4, Gain = ±12dB
- Power Consumption: 11W

The SFX-04 Twin Tube Mayhem is suitable for guitarists seeking a versatile preamp with a powerful distortion and a built-in boost, offering a wide range of tonal shaping capabilities for various musical applications, especially in high-gain and metal genres.