Accuphase A-48S

11000 €

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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.

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

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