Source: Press Release, Last Accessed: 2020/02/03

Chord Electronics has introduced its ground-breaking next-generation Ultima amplifier topology to (full-size) stereo for the first time, with the introduction of two new power amplifiers, the Ultima 5 and Ultima 6.
The new models, which benefit from John Franks’ ground-breaking dual-feed-forward amplifier topology, directly replace their predecessors: Ultima 5 (300W) will replace the legendary SPM 1200 MK II (widely considered to be the definitive Chord Electronics amplifier), with the Ultima 6 (180W) replacing the SPM 1050 MK II. Ultima 5 and 6 share the same DNA as the flagship and reference-level mono amps, yet benefit from greater practicality and affordability, due to differing power outputs.
According to the press release, Ultima’s technology is based on a technical paper by Dr. Malcolm J. Hawksford (emeritus Professor at Essex University) which was taken up and refined by Bob Cordell of Bell Labs. Chord Electronics’ owner and Chief Designer, John Franks, then took the theory and developed it to a much higher level; a progression of Cordell’s advanced dual-feed-forward error-correction topology incorporating Franks’ own advanced concepts in ultra-high-frequency power supplies. The nested feed-forward and global feedback allowed for Chord Electronics’ custom-designed dual silicon die MOSFET output transistors to perform uniquely, setting new standards for performance.
The Ultima 5 features 64 (32 in Ultima 6) proprietary MOSFET power devices with a drive circuitry based on an ultra-low-distortion, high-voltage amplifier operating at very high speed: 300V/μs, and benefiting from advanced feed-forward and feedback compensation techniques. Chord Electronics’ TO3-style dual-die lateral-matched MOSFETs are continuously monitored with output stage error-correction circuitry and feature fully balanced input circuitry with DC-tracking servos and full temperature compensation. Ultima is a truly unprecedented amplifier topology with exceptional performance and is one of the most advanced amplifier technologies in the world, the company stated.
The precision CNC-machined fascia is made from aircraft-grade aluminum and features a solid 28mm thick front panel, enhanced by a recessed spherical polycarbonate power button that illuminates for standby and operation modes; a discreet, hidden front panel switch, located in the vertical split line, enables dimmable lighting. Chord Electronics’ renowned casework offers a high-end and entirely non-resonant enclosure for the electronics. The casework is neatly complemented by the unique and stackable Integra Leg system (in Jett Black, Argent Silver or Nickel finishes). The amplifiers’ rear panels contain both balanced and unbalanced connections, high-quality loudspeaker terminals, a 12 V trigger and an IEC C-19-type power cord receptacle.

For more information: https://chordelectronics.co.uk/

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