Headway EDB-2 H.E. Dual Preamp Main Specifications: Dual-channel design with independent input and gain controls 5-band EQ that functions independently for each channel Notch filter that functions on channel 1 or 2 Harmonic enhancer (continuously variable) with the newly developed H.E.A.T function, functioning on channel 1, 2, or both Phantom power can be supplied to the TRS phone "Ring" and "Tip" of channel 1 input, or the XLR of channel 2 input, supporting all microphones and pickups Phase inversion switch that functions on channel 1 only, or both Ground lift switch to reduce hum noise "Range" switch, a high-pass filter optimized for each instrument such as violin, guitar, and bass, functioning independently for each channel Send/return terminals for connecting external effects to channel 1 ※Does not apply to CH2. iPhone/AUX input (post-EQ) to support backing tracks and practice Mute switch that functions independently for each channel Mono/stereo phone, XLR input Phone, XLR output Microphone stand mounting hole (5/8 inch) equipped Belt clip included Power: Dry cell batteries (9V/included), 18V AC adapter (center negative/included) External dimensions: 100 x 160 x 30 mm (W x D x H) *Excluding protrusions such as knobs Weight: 522g (including dry cell batteries) ※No power adapter