Half-Rack British-Styled Mic Pre Meet the Black Lion Audio B173 mkII — the most portable 1073 British-sound around! The B173 mkII uses the same Cinemag input and output transformers as our B173 Quad for a whopping 70dB of gain, a revamped gain stage, and a lower noise floor for cleaner, lower distortion sound. A front panel D.I. delivers a harmonically rich tone to guitars, keyboards, and synthesizers, and stepped input gain and variable output attenuation allow for perfect control over transformer saturation Product Features/Specifications: 1-channel preamp with USA Cinemag input and output transformers Stepped gain control; variable output attenuator Front-panel DI, phantom power, polarity-reverse, 18dB pad, hi-Z switch External power supply minimizes noise Convenient, rugged half-rack chassis Designed and assembled in the USA Technical Specifications: Link: https://www.blacklionaudio.com/store/mic-pres/b173-mkii-half-rack-british-styled-preamp/#technical%20specifications Preamp Type: Solid State Number of Channels: 1 Phantom Power: Yes Pads: -18dB Polarity Switch: Yes Analog Inputs: 1 x XLR (mic), 1 x 1/4″ (Hi-Z) Analog Outputs: 1 x 1/4″ TRS Rack Spaces: Half-rack Power Source: 24V AC Adapter (included) Height: 1.75″ Depth: 6.5″ Width: 9.5″ Weight: 3.2 lbs. Manufacturer Part Number: B173MK2