Electro-Harmonix Battalion Bass Preamp & DI Pedal. Flexible bass preamp and DI delivers powerful tone-shaping capabilities in a rugged pedalboard-friendly package! The EHX Battalion Bass Preamp and DI features a four-band equalizer, fully-featured MOSFET distortion section with three signal path options, a compressor, a noise gate, and comprehensive I/O, making it an all-in-one tone tank for bass guitar. Product Highlights: Four-band EQ tailored for bass with Bass (below 200Hz), Lo Mid (280Hz), Hi Mid (750Hz), and Treble (above 2kHz). Distortion section with Level, Blend, Drive, and Tone controls plus footswitch. Three signal flow modes—Pre EQ, Post EQ, and Dry EQ—for tonal flexibility. Compressor with pushbutton, amount control, and LED for added thump and sustain. Noise Gate with adjustable threshold to eliminate hum while preserving attack and tone. Flexible I/O with switchable 10dB pad for active basses, XLR balanced output with ground lift, and separate dry output. Product Features: Gate Knob: Sets noise gate threshold. VOL Knob: Master output level. Bass/LO MID/HI MID/Treble Knobs: EQ controls. Compressor Knob & Button: Adjust and engage compression. Level Knob: Distortion output level. Blend Knob: Mix dry and distorted signals. Drive Knob: Distortion intensity. Tone Knob: High-frequency cut for distortion. Distortion Pre/Post/Dry EQ Switch: Sets distortion position in signal chain. -10dB Pad Button: Reduces input for high-output basses. Ground Lift Button: Disconnects XLR ground if needed. XLR Bypass Button: Sets XLR output to follow bypass state. XLR VOL Knob & XLR Jack: Balanced DI output level and connection. Output Jack: Main 1/4" output. Dry Output Jack: Unaffected signal output. Input Jack: Instrument input. Drive Footswitch & LED: Toggles distortion. Bypass Footswitch & LED: Toggles overall effect. Product Specifications: Circuit: Analog. Bypass: Buffered Bypass. Audio: Mono. Power Supply: 9.6VDC-200mA power adapter included. Dimensions (in): 5.75 x 4.75 x 2.5. Current Draw: 100mA. Year Released: 2017. UPC: 683274011943.