Chord Electronics Etude

The Chord Electronics Étude stereo amplifier is the British brand’s first model to feature a fundamentally new topology since its founding in 1989. Compact in size, it incorporates aerospace-derived technologies. With 150 watts per channel and the ability to operate in bridged mono mode, the Étude combines technical precision and musical fluidity in a surprisingly compact format.

Unprecedented Technological Innovation

The Étude marks a turning point in Chord Electronics’ history thanks to its groundbreaking amplification technology. Based on a multi-feedback error correction system and dual power supply, this approach intelligently adjusts and compensates for the individual linearity of the proprietary 250-watt lateral-structure MOSFETs. This sophisticated architecture enables even faster power delivery than previous models, offering unmatched dynamics and a lifelike rendering of transient information.

One of the Étude’s most remarkable technical features lies in its three independent high-frequency switching power supplies—one for each active power rail and a third for the auxiliary rails. This configuration, unusual in the world of amplification, ensures exemplary stability and significantly contributes to the device’s exceptional sound clarity.

A Distinctive and Refined Sound Signature

The Étude’s sonic performance is defined by a rare combination of technical precision and musicality. Where many amplifiers force a choice between analytical rigor and emotional fluidity, the Étude excels at both. Critics highlight its ability to faithfully reproduce the finest details with “mountain-like clarity,” while preserving musical emotion and the natural rhythm of performances.

Listeners will especially notice the Étude’s exceptional speed, which gives instrument attacks striking definition. This characteristic is particularly impressive on percussive passages, where the amplifier conveys not only the sound but also the physical sensation of the strikes. In the low end, bass lines are “tight and easily identifiable,” with precise articulation that serves the rhythm admirably.

Unlike some transistor amplifiers that can sound clinical, the Étude manages to combine technical rigor with an ability to “live within the music,” preserving the artistic intent and expressiveness of the performers.

Concentrated Power in a Compact Format

The Étude surprises with its power-to-size ratio. Measuring just 6.7 cm high, 33.5 cm wide, and 17.5 cm deep, and weighing 3.45 kg, this amplifier still delivers 150 watts per channel into 4 ohms in stereo configuration. This power can be increased to 300 watts in bridged mono mode, offering valuable flexibility to suit different listening situations and speaker types.

This compactness does not come at the expense of build quality. The solid aluminum chassis houses an active cooling system with a plenum chamber, ensuring optimal heat dissipation despite the small size. Advanced internal shielding effectively protects sensitive circuits from electromagnetic interference, contributing to signal purity.

Remarkable Technical Versatility

The Étude also stands out for its comprehensive connectivity, including balanced XLR and unbalanced RCA inputs for flexible integration into any high-quality audio system. The WBT multiway speaker terminals accept various types of connectors, including banana plugs, making it easy to connect to your favorite speakers.

A notable technical feature is the phase switches located beneath the inputs of each channel. These switches offer several practical options: they facilitate bridged mono configuration, allow absolute phase inversion for better integration in certain systems, or can correct a phase issue originating from another component in the chain.

An Essential Link in the Choral Range

The Étude fits seamlessly into Chord Electronics’ Choral range, both aesthetically and technically. Designed specifically to complement the DAVE DAC (which also features a preamplifier function), the Étude fully exploits the potential of this multi-award-winning converter.

Within the Chord Electronics ecosystem, the Étude occupies a strategic mid-range position, above the popular Qutest and Hugo lines but more accessible than the reference Ultima series. This position gives it an excellent quality/performance ratio while benefiting from technological advances developed for the high-end models.

Aesthetically, the Étude adopts the distinctive design of the Choral line, with its precise geometric shapes and meticulous finishes that reflect the British brand’s uncompromising approach.

Technical Specifications

Audio Performance

• Frequency range: 5 Hz – 120 kHz +/- 0.5 dB
• Gain: 30 dB
• Channel separation: greater than 95 dB
• Fast response, outstanding dynamics, precise speaker control

Power and Power Supply

• Output power: 150 W RMS per channel at 0.05% distortion into 4 Ω
• Configuration: Class AB, 2 x 150 W into 4 Ω (300 W in bridged mono)
• Power consumption: 300 W
• 3 independent high-frequency switching power supplies

Connectivity and Impedance

• Input impedance: 100 kΩ unbalanced / balanced
• Input capacitance: < 30 pF
• Output impedance: 0.02 Ω
• Output inductance: 2.6 μH

Physical Characteristics

• Dimensions: 6.7 cm (height) x 33.5 cm (width) x 17.5 cm (depth)
• Weight: 3.45 kg
• Active cooling, advanced internal shielding

Technologies and Innovations

• Unique topology derived from aerospace, first major innovation since 1989
• Exclusive technology: multiple feedback error correction & dual anticipation
• Proprietary 250 W MOSFETs, optimized linearity
• Designed to complement the DAVE DAC, with preamp compatibility