Power One 300B

The long-awaited Reference Power One monobloc power amplifiers from Audio Space have finally arrived in production, after more than a 5-year wait. It’s Audio Space’s flagship product and has won the Audio Excellence Award in Japan. Audio Space founder and chief designer Peter Lau has spared no expense building the Reference Power One. He has specified German-made ‘Magic Power’ power capacitors, which are guaranteed for 50 years, for the power supply while the all-important audio output transformers hand-wound in Audio Space's own factory. All coupling capacitors are silver/oil impregnated M-Caps from Germany. The circuitry is a true balanced design, output power is rated at 75-watts per channel in pure Class-A. Input gain is switchable between 0dB and –6dB, and input phase is switchable between 0° and 180°. Front-panel metering allows you to keep track of the valves’ bias voltage and make adjustments if required. ‘The Reference One embraces power and refined performance that exemplify sonic reproduction at its finest,’ says Johnny Li of AudioSpace Australia. ‘It will deliver the most demanding musical passages with ease while retaining its remarkable ability to resolve the finest details with enormous soundstage and vivid imaging.’ Lau mainly specifies stainless steel for the amplifier cabinet and aluminium or bronze as the front panel, and these materials are in abundance on the Reference Power One. Well-known US reviewer Jonathan Valin is an Audio Space fan. ‘The utterly unstrained, non-electronic transparency of these Audio Space products from Peter Lau is phenomenal,’ he famously said of Lau’s earlier Reference Two preamp and Reference Three Power amps. Available now, the Audio Space Reference One sells for $10,920 per pair.

Manufacturer’s Specifications Audio Space Power One
Power Output: 60-watts per channel
Input Impedance: 100kΩ (unbal); 600Ω (bal)
Frequency Resp: 20Hz–20kHz ±0.5dB
THD: <5.0%
S/N: >87dB
Dimensions (WDH): 475×405×215mm
Weight: 37.5kg
Valve Complement: 300B, 6N9P/6SL7, 12AX7/ECC83, 12AU7/ECC82