m Pure Class A operation delivers quality power: 45 watts × 2 into 8 ohms m Power MOS-FET output stage features 6-parallel push-pull configuration m Instrumentation amplifier principle m Further improved MCS+ circuit topology m Current feedback combines stable operation with outstanding sound m Bridged mode allows upgrading to true monophonic amplifier m Large high-efficiency toroidal transformer rated for 600 VA m 4-step gain control
Pure Class A power amplifier uses power MOS-FET devices to deliver 45
watts per channel (8 ohms) Fully balanced signal paths as found in highquality instrumentation amplifiers. Further refined MCS+ topology and current feedback result in superb sound quality and excellent ratings for S/N
ratio, THD, and other parameters. Strong power supply and power MOSFET devices in six-parallel push-pull configuration sustain an amazing 360
watts per channel into ultra-low impedance 1-ohm loads (with music signals).
Pure Class A power amplifiers from Accuphase have long been blending the purity of class
A operation with the superior performance of power MOS-FETs. Acclaimed by audiophiles the world over, these products reflect a level of technical know-how that is second to none.
Completing the A series lineup, the A-45 is ideal for systems that demand not quite the high power levels of the A-60 but require more power than the A-30 provides. The A-45 of course also demonstrates the same unwavering dedication to sound quality and outstanding design policy which are the hallmark of Accuphase. This pure class A stereo power amplifier with its distinctive external heat sinks is built for the true enjoyment of music.
The so-called instrumentation amplifier principle is used throughout. The signal handling stages feature further improved MCS+ topology and the renowned current feedback approach.
This results in electrical characteristics that surpass even the demanding standards set by its predecessors. Employing only highest grade materials and strictly selected parts, the
A-45 realizes the two most important goals of an amplifier: very low output impedance and constant drive voltage.
The output stage features power MOS-FETs renowned for their excellent sound and superior reliability. For each channel, six of these devices are arranged in a parallel push-pull arrangement. Because MOS-FETs have negative thermal characteristics, there is no danger of thermal runaway as exists with bipolar transistors. Operation remains totally stable even when the amplifier is running hot.
Driving these devices in pure class A assures high-definition sound that brings out the finest nuances in the music.
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