The Calysto


The Calysto is designed for ultimate fidelity. It features a wider 'Class A' operating region in the output stage, providing exceptional resolution in the upper-midrange and high frequencies at low output power levels.

The Calysto is especially suited to driving the Mid/HF channel amplifier in a high-performance split system. Front panel design and footprint are compatible with the Apollo, Athene and Artemis, allowing amplifiers to be stacked.



Input sensitivity: 1.55 Vrms
Input impedance: 10 kohm
Voltage gain: +32 dB or +26 dB, switch-selectable
Peak power output: 550W/8ohm; 1.1kW/4ohm; 2ohm stable
Peak output voltage: 67 Vac, ±95 Vpp
Peak output current: 70 A
Frequency range: 1Hz–100kHz
Full-power bandwidth: 5Hz-25kHz
Minimum rated load: 4ohm
Damping factor: > 1000
Output noise: < 35uVrms
Dynamic range: > 126 dB linear; > 132 dB A-weighted
THD+N: < -92dB (0.0025%)
Mains voltage: 230/115Vac, factory pre-configured
Power draw: 150W idling; < 20W standby
Max current draw: < 5A / 230V
Inputs: XLR balanced, RCA unbalanced
Trigger voltage: 12V in, 12V out
Trigger input/output: 3.5mm jacks
Dimensions: 440(w) x 254(h) x 545(d), mm
Weight: ~64kg, 75kg shipping

Legacy designs