The Chord Electronics BerTTi is a compact stereo power amplifier that exemplifies the company's commitment to high-fidelity audio and innovative engineering. As part of Chord's Table Top (TT) range, it is designed to complement components like the Hugo TT2 DAC/preamp and the M Scaler, offering a high-quality audio solution in a space-efficient form factor.
Design and Build Quality
Constructed from aircraft-grade aluminum, the BerTTi boasts a robust and elegant design. Its dimensions (59 mm H x 235 mm W x 256 mm D) and weight (3.75 kg) make it suitable for desktop setups or environments where space is at a premium. Available in Jett Black or Argent Silver finishes, the amplifier features a minimalist front panel with a single polycarbonate sphere functioning as a power switch, which illuminates to indicate operational status. The rear panel offers both balanced XLR and unbalanced RCA inputs, high-current gold-plated speaker terminals, a 12V trigger input, and an IEC power inlet with a master power switch.
Technical Specifications
The BerTTi is a fully balanced Class AB MOSFET amplifier, delivering 75 watts per channel into 8 ohms and 110 watts into 4 ohms. It incorporates Chord's latest dual-feed-forward error-correction topology, known as ULTIMA, which continuously monitors and corrects the input signal ahead of the output stage to minimize distortion. The amplifier also features twin switched-mode power supplies and an auxiliary power rail at the front end, providing additional voltage to drive the custom-made MOSFETs.
Sound Performance
Reviewers have consistently praised the BerTTi for its dynamic and weighty presentation, combined with a natural balance free from harshness or unnatural exaggeration. The amplifier delivers a clean yet powerful sound, with impressive control over bass frequencies. Its ability to render a wide and accurate soundstage allows for precise image placement within the stereo field. The BerTTi excels in delivering a fast, uncluttered, and dynamic musical experience without unwanted brightness or forwardness.
Comparisons and Considerations
While the BerTTi's 75-watt output may seem modest compared to some larger amplifiers, its performance often belies its size. It offers a level of detail and transparency that competes with higher-priced equipment. However, some listeners may desire a bit more openness and airiness in the high frequencies, which could be found in more powerful or differently voiced amplifiers. Additionally, the BerTTi can become quite warm during operation, so adequate ventilation is recommended.
Conclusion
The Chord Electronics BerTTi is an attractive and compact power amplifier that complements Chord’s products, particularly the Hugo TT2 and M Scaler. Its weighty and powerful sound belies its dimensions and was never less than a pleasure to listen to. The system as a whole proves that it is possible to enjoy top-quality sound without compromising your living space.