Warm Audio WA273 Dual-Channel Microphone Preamp

The Warm Audio WA273 is a dual-channel, Class-A microphone preamp designed to provide up to 80 dB of gain for engineers, producers, musicians, and vocalists in mobile-recording rigs and home, project, and commercial studios. It features custom Carnhill transformers and is wired and assembled by hand to deliver the sound and functionality of classic British ’73-style preamps.

Its inputs include balanced XLR and 1/4″ TRS jacks and two front-panel 1/4″ TS instrument inputs. Input impedance, polarity, ground lift, and phantom power are switchable. Connect an outboard compressor or equalizer via the 1/4″ TS insert send and return jacks. Balanced XLR and 1/4″ outputs are fed by output level controls and allow compatibility with most audio interfaces and mixing consoles. The selectable high-pass filter can be set to 50 Hz, 80 Hz, 160 Hz, or 300 Hz for management of unruly bass frequencies.

The WA273 is rack-mountable and occupies 1 RU.

Features:
– Occupies 1 RU
– Dual-channel, Class-A mic preamp wired and assembled by hand
– Created through years of R&D, careful reverse-engineering, and countless hours of auditioning
– Designed to function and sound like a classic ’73-style preamp
– Fully discrete, transformer-balanced signal path
– Custom Carnhill transformers saturate sweetly when pushed
– Tantalum and polystyrene capacitors in the signal path and an output transistor choice that is smooth in high-gain settings
– Stepped mic pre gain
– Inductor-based selectable high-pass filter
– Balanced XLR and 1/4″ inputs and outputs
– Front-panel 1/4″ TS instrument inputs
– 1/4″ TS insert sends and returns
– Output controls with 5-segment LED meters