Darkglass Limited Edition Microtubes B7K Bass Overdrive / Preamp LIMITED SERIES WITH DALE KEOWN ARTWORK Pedal with classic warm tube tones, and scooped ultra high gain distortion. Built in DI Output for live and studio applications. Level: Controls the level of the Overdriven Signal. Blend: Allows mix of clean signal with overdriven. Drive: Sets the amount of preamp gain. Grunt Switch: Choose between 3 different Bass boost levels before the gain stages. Attack Switch: Features the same as "Ultra Hi" option in tube bass amps, boost setting gives more clarity, presence and definition, off option will round up the sound, making it warmer and less sharp. Low: +-12dB @ 100Hz. Mid: +-12dB @ 1kHz. Hi Mid: +-12dB @ 2.8kHz. Treble: +-12dB @ 5kHz. Parallel Output: It allows clean signal, and re-route it in any way. DI Output: For live aplications going straight to PA System, and also for studio situations straight to any interface. Gnd Lift: Ground on the DI section for avoiding hums, and any other ground related noise. Indestructible bypass switch with highest quality buffer bypass (mandatory for always-on DI). Original hybrid FET/CMOS gain stages to provide an natural tube-like dynamic response, power by 9V DC power supply (not included - optional 108096), Made in Finnland, laser etched artwork, shows the "Worthington the Third"