The AD2055 brings together fully discrete, pure Class A amplification with advanced passive and active filter topologies. Its unique circuit design delivers exceptional transient accuracy and musical detail, even under the most demanding EQ tasks.

Thanks to a precision auto-bias DC servo system, the AD2055 operates without interstage coupling capacitors, preserving signal integrity from input to output. The result is an equalizer that adds clarity, dimension and life to any performance.

AD2055 Features

• Pure Class A, 100% discrete architecture
• Smooth, musical response with outstanding detail
• Ultra-short, optimized audio path
• True dual-mono operation
• Transparent active/passive hybrid filter design
• High headroom at +30 dB
• Extremely low noise floor at –94 dB
• Fully balanced inputs and outputs
• DC-coupled signal path with no audio transformers
• Switched frequency selections for high and low bands
• Mid bands include X10 frequency expansion for extended range
• Wide bandwidth (–3 dB from 1 Hz to 450 kHz)
• Low distortion (<0.5% THD + IMD)
• Signal routing via sealed silver relays
• Conductive-plastic pots for long-term stability and low noise
• External 150 W toroidal power supply
• Discrete power supplies dedicated to the audio path
• Rugged construction with stainless-steel hardware

A New Standard in Musical Equalization

The Avalon AD2055 is one of the most powerful and lowest-noise parametric EQs available today. Engineered to preserve absolute signal integrity, it blends the best of passive sweetness with active precision, delivering results that lesser designs can’t match.

Perfect for mix bus shaping, instrument enhancement, effects processing and high-end mastering rooms, the AD2055 offers unmatched musicality, reliability and control. Built with fully discrete, balanced Class A amplifiers and robust hardware, it’s designed to deliver world-class audio performance for years to come.

Serial No: #31037

PSU is switchable between 100V and 240V, currently set to work on 240V.

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