Accuphase A-48 Class-A Stereo Power Amplifier

Name: Accuphase A-48 Class-A Stereo Power Amplifier
Brand: Accuphase
SKU: ACCA48
Availability: InStock

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Pure Power, Refined Performance

The Accuphase A-48 is a powerhouse amplifier designed to deliver exceptional performance in high-end audio systems. With its robust construction and advanced circuitry, the A-48 offers a level of control and authority that is second to none.

At the heart of the A-48 lies a fully balanced Class-A amplifier circuit, ensuring exceptional linearity and low distortion. The amplifier's power supply is designed to provide clean, stable energy, even during demanding listening sessions. The result is a sound that is both powerful and refined, capable of driving even the most demanding speakers with ease.

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Specifications

Continuous Average Output Power (20–20,000 Hz): Stereo operation (both channels driven) - 360 watts per channel into 1 ohm, 180 watts per channel into 2 ohms, 90 watts per channel into 4 ohms, 45 watts per channel into 8 ohms. Monophonic operation (bridged connection) - 720 watts into 2 ohms, 360 watts into 4 ohms, 180 watts into 8 ohms.
Total Harmonic Distortion: Stereo operation (both channels driven) - 0.05% with 2 ohm load, 0.03% with 4 to 16 ohm load. Monophonic operation (bridged connection) - 0.05% with 4 to 16 ohm load
Intermodulation Distortion: 0.01%
Frequency Response: At rated output: 20 – 20,000 Hz +0, -0.2 dB. At 1 watt output: 0.5 – 160,000 Hz +0, -3.0 dB
Gain: 28.0 dB (with GAIN selector at MAX) (Stereo and monophonic operation)
Gain Selection: MAX, -3 dB, -6 dB, -12 dB
Output Load impedance: Stereo operation - 2 to 16 ohms. Monophonic operation: 4 to 16 ohms
Damping Factor: 800
Input Impedance: Balanced - 40 kilohms. Line - 20 kilohms
Signal-to-Noise Ratio (A-weighted, input shorted): 117 dB (GAIN selector at MAX), 122 dB (GAIN selector at -12 dB) At rated continuous average output
Output Level Meters: -60 dB to +3 dB (indication in dB and %) Logarithmic scale. Operation selector: OFF / NORMAL / HOLD (∞). Meter sensitivity selector (-20 dB). ＊Monophonic operation: same value displayed for left/right.
Power Requirements: AC 120 V/230 V, 50/60 Hz (Voltage as indicated on rear panel)
Power Consumption: 180 watts idle. 427 watts in accordance with IEC 60065
Maximum Dimensions: Width 465 mm, Height 211 mm, Depth 464 mm
Mass: 33.0 kg net, 40.0 kg in shipping carton

A final-frontier power amp

AudioFi.net

Featuring a six-fold parallel push-pull architecture, the A-48 harnesses a wealth of advanced technology. Its outstanding performance is exemplified by a signal/noise ratio of 117 dB, output of 360 watts into 1 ohm (music signals), and a damping factor of 800. The newly designed output protection circuit can detect any short-circuiting of the speaker terminals, for complete peace of mind. This power amplifier is the ultimate instrument for immersive music appreciation on the highest level.

Features

- Pure Class A operation delivers quality power: 45 watts x 2 into 8 ohms

- Power MOSFET output stage features 6-parallel push-pull configuration

- Further improved MCS+ circuit topology

- Current feedback principle combines stable operation with outstanding sound quality

- Bridged mode allows upgrading to true monophonic amplifier

- Large high-efficiency toroidal transformer

- 4-stage gain control

- Balanced remote sensing

- Two sets of large speaker terminals

AudioFi.net

If you are looking for a final frontier amplifier that can live with you through the years, the Accuphase A-48 might fit the bill, given its timeless design, involving musicality, solid build, quality components and, best of all, proven capability and power reserves to drive difficult loads