The multi-award winning Chord Electronics Choral family of products has never sounded so good. Welcome Étude to the table, a 150 watt Class AB stereo power amplifier featuring the first fundamentally new topology since Chord Electronics’ inception in 1989, using highly advanced technologies seen within the aerospace industry.

The Choral Étude has been designed to both compliment and exploit the full potential of the multi-award winning Dave DAC, which has preamp functionality, and the brand new topology has even faster power delivery than exiting designs, offering unrivaled dynamics, life-like delivery of transient information, plus effortless control over loudspeaker drive units.

The design for Étude is based upon multi-feedback and dual feed-forward error-correction amplifier technology that intelligently adjusts and compensates the individual linearity of the 250-watt lateral structure high-power proprietary MOSFETs. Internally there are three individual high frequency switch mode power supply units, one for each active power rail and a final for the auxiliary rails. When paired with advanced internal shielding, active cooled plenum chamber design, and custom Chord Electronics MOSFETs, you have Étude, a world class extremely fast crystal clear amplifier.

Although the amplifier is conservatively rated at 150 watt into 4 Ω, if you run Étude in bridged mono mode you can increase this to 300 watt into 4 Ω.

Chord Electronics Ltd. Etude User's Manual

Weight: 3.45 kg

Key Features

- Class AB Sliding Bias

- HF Switch Mode Power Supply

- Chord MOSFET Construction

- Fully Balanced Circuitry

- Fan Cooled

- Stereo Balanced XLR Inputs

- Stereo Unbalanced RCA Inputs

- Solid Aluminum Chassis

- Bridgeable to 300 watt - 4 Ω

Output Power: 150 watts RMS per channel @ 0.05% distortion into 8 Ω

Gain: 30 dB

Channel Separation: Better than 95 dB

Input Impedance: 100 kΩ unbalanced/balanced

Input Capacitance: <30 pf

Output Impedance: 0.02 Ω

Output Inductance: 2.6 μH

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