
CHORD ELECTRONICS
ULTIMA
Amplification
Created for exceptional high-end audio systems and their most demanding loudspeakers, ULTIMA is a mono power amplifier that marks a defining achievement in Chord Electronics’ 30-year history. Its entirely new circuit topology combines advanced dual-feed-forward error correction, developed from the work of Dr Malcolm J. Hawksford and refined by Bell Labs’ Bob Cordell, with John Franks’ sophisticated ultra-high-frequency power supply concepts. At its heart are 64 proprietary MOSFET power devices, supported by highly refined, ultra-low-distortion, high-voltage circuitry. Operating at 300 volts per microsecond, with advanced feed-forward and feedback compensation techniques, ULTIMA delivers 780 watts into 8 ohms and up to 2,500 watts into 2 ohms. Peak output current exceeds 500 amperes, bringing formidable reserves to musical transients for extraordinary dynamics, fidelity and musicality. Fully balanced circuitry, Class AB sliding-bias operation and a high-frequency switch-mode power supply are housed within a solid aluminium chassis. Convection cooling, balanced XLR and unbalanced RCA inputs in both inverted and non-inverted configurations, and a 12V trigger input complete the design, while dimmable feature lighting and an included top light ring provide a distinctive finishing touch.
Preview collection · Availability to be confirmed
THE DETAILS THAT MATTER
Technical specifications
Chord Electronics · ULTIMA
| Inputs | 1 × balanced XLR inverted; 1 × balanced XLR non-inverted; 1 × gold-plated unbalanced RCA inverted; 1 × gold-plated unbalanced RCA non-inverted; 1 × 12V trigger (Chord Electronics Auto Start) |
|---|---|
| Chassis | Solid aluminium |
| Cooling | Convection |
| Sale Unit | Single monoblock |
| Power Output | 780 W RMS into 8 ohms at 0.05% distortion; 1,405 W RMS into 4 ohms; 2,500 W into 2 ohms |
| Power Supply | High-frequency switch-mode |
| Amplifier Class | Class AB with sliding bias |
| Input Impedance | 100 kohms (unbalanced/balanced) |
| Speaker Outputs | 2 pairs of high-current, gold-plated speaker terminals, suitable for bi-wiring |
| Output Impedance | 0.04 ohms |
| Channel Separation | Better than 90 dB |
| Frequency Response | 0.2 Hz–46 kHz (-1 dB); 0.1 Hz–200 kHz (-3 dB) |
| Peak Output Current | Over 500 A |
| Signal-to-Noise Ratio | Better than -90 dB |
| Dimensions (H × W × D) | 30.5 × 48 × 75 cm with Integra legs; 28.5 × 42 × 75 cm with optional side blocks |
| Power / Amplification Requirements | 780 W RMS into 8 ohms at 0.05% distortion; 1,405 W RMS into 4 ohms; 2,500 W into 2 ohms · built-in amplification |
| Condition Grade | Brand New · Factory sealed |
| Warranty Terms | Full manufacturer warranty · duration to be confirmed |



