Accuphase A-48S Class-A Stereo Power Amplifier

The A-48S incorporates state-of-the-art technologies to create a Class A power amplifier that delivers superb performance. Benefitting from years of ideal designs of high-performance units, the A-48S utilizes 6-parallel pull-push power MOS-FETs and boasts an output of 50 W into 8 ohms, 100 W into 4 ohms, 200 W into 2 ohms, and 400 W into 1 ohm at the same size as conventional models. The noise level has also been further reduced by 6%, while providing a damping factor of 1,000. The A-48S will bring the best out of any speaker, enabling you to enjoy unparalleled sound quality and expansiveness.

Features

Class A driven 6-parallel push-pull MOS-FET output stage

Large linear output of 50 W / 8 ohms, 100 W / 4 ohms, 200 W / 2 ohms, 400 W / 1 ohm

Instrumentation amplifier

Current feedback amplification topology

Balanced remote sensing

MCS+ circuitry

Large, high-efficiency toroidal transformer

High capacity 68,000 μF filtering capacitors

Large speaker terminals connected directly to protection circuitry

Protection circuitry using MOS-FET switches

High damping factor of 1,000

Large, high-sensitivity power meters ranging from –50 dB

Bi-amping connection and bridged connection switching

Speaker output protection circuit guards against short-circuiting

Aluminum hairline finish top plate

High-carbon cast iron insulator feet with superior damping characteristics

Specifications

Power output: 50 watts per channel into 8Ω (stereo), 200 watts into 8Ω (mono)

Frequency response: 20Hz to 20kHz

Total harmonic distortion: 0.03%

Damping factor: 1000

Gain: 28 dB

Input sensitivity: 0.8V

Signal to noise ratio: 118dB

Dimensions: 465 x 211 x 464mm

Weight: 34.8kg