The Stereo 60 MkIV is the latest generation of Icon Audio’s powerful integrated amplifier — the world’s first integrated design on KT150 valves with switchable ultra-linear and triode modes. It delivers an impressive 85 W per channel in ultra-linear mode and 50 W in pure triode, with power reserves to drive virtually any loudspeaker.
The driver stage is based on 6SN7 valves, and the power supply is regulated by a large choke. The amplifier can work as an integrated unit or as a power amplifier fed from a separate preamplifier. A switch lets you choose the character of operation at any time — more power (ultra-linear) or the purest triode sound.
The design is full hand-wired point-to-point with high-quality components: a Japanese ALPS Blue potentiometer, Solen capacitors and LDT transformers wound to order. It is completed by a valve-bias meter, a recording loop and a remote control.
| Output power | 85 W (ultra-linear) / 50 W (triode) per channel |
| Output valves | 4× KT150 (or KT120 / KT170) |
| Driver valves | 4× 6SN7 (CV181) |
| Input sensitivity | 350 mV (high) / 1.2 V (low) |
| Signal-to-noise ratio | −90 dB |
| Frequency response | 20 Hz – 20 kHz (±0 / −0.5 dB, full power) |
| THD distortion | <0.05% at 1 kHz |
| Speaker impedance | 4 and 8 Ω |
| Inputs | 4 line + tape monitor |
| Power supply | 220 / 240 V; 200 W typical (max. 500 W) |
| Dimensions (W × D × H) | 430 × 380 × 230 mm |
| Weight | 35 kg |
Powerful integrated valve amplifier on KT150 — 85 W ultra-linear or 50 W in triode, choke-regulated power supply, hand-wired assembly. Icon Audio's first integrated KT150.
