Ampeg SCR DI, DI-Box with Overdrive for Bass, The footswitchable Ampeg preamp offers a wide selection of authentic Ampeg sounds, from smooth Portaflex up to harmonically-rich SVT, Real distorted SVT tone, Controls (Scrambler): Drive and Blend, Controls (pre-amp): Volume, Bass, Mid, Treble and AUX Level, Ultra Lo and Ultra Hi switch, AUX input (6.3 mm & 2.5 mm jack), Balanced XLR line output with ground lift, Output jack, Thru jack output (unprocessed), Headphone output, Power supply: 9V battery or 9 - 12V DC power supply (not included), Current consumption: 100 mA, Dimensions (W x H x D): 193 x 56 x 110 mm, Weight: Approx. 1.2 kg