1
of
2
Loading...
Accuphase A48S Class A Stereo Power Amplifier
The Accuphase 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
| Rated Output: | (20 – 20,000 Hz) |
| Load: | 8 ohms / 4 ohms / 2 ohms / 1 ohm |
| Normal / Bi-amping Connection: | 50 W / 100 W＊ / 200 W＊ / 400 W＊ |
| Bridged Connection: | 200 W＊ / 400 W＊ / 800 W＊ / – |
| Total Harmonic Distortion: | (20 – 20,000 Hz, at rated output) |
| Normal / Bi-amping Connection: | 2 ohms: 0.05% / 4 to 16 ohms: 0.03% |
| Bridged Connection: | 4 to 16 ohms: 0.05% |
| Intermodulation Distortion: | 0.01% |
| Frequency Response: | At rated output: 20 – 20,000 Hz (+0, –0.2 dB) |
| Frequency Response: | At 1 W output: 0.5 – 160,000 Hz (+0, –3 dB) |
| Damping Factor: | Normal / Bi-amping connection: 1,000 |
| Input Impedance: | BALANCED / LINE input: 40 kilohms / 20 kilohms |
| Input Sensitivity: | |
| Output: | At rated output / At 1 W output |
| Normal / Bi-amping Connection: | 0.80 V / 0.11 V |
| Bridged Connection: | 1.59 V / 0.11 V |
| Signal-to-Noise Ratio: (A-weighted, input shorted) |
|
| GAIN Switch at MAX / –12 dB: | 118 dB / 123 dB |
| Gain: | |
| Gain Switch: | MAX / –3 dB / –6 dB / –12 dB |
| Gain Values: | 28 dB / 25 dB / 22 dB / 16 dB |
| Power Meters: | Format: Logarithmic scale, with illumination off switch |
| Display Range: | –∞ to +3 dB |
| Hold Time: | Switchable |
| Power Requirements: | 120/220/230 V AC, 50/60 Hz (Voltage as indicated on rear panel) |
| Power Consumption: | |
| Idle: | 200 W |
| In Accordance with IEC62368-1: | 220 W |
| Standby: | 0.3 W |
| Maximum Dimensions: | Width: 465 mm (18.3”) × Height: 211 mm (8.3”) × Depth: 464 mm (18.3”) |
| Mass: | |
| Net: | 34.8 kg |
| In Shipping Carton: | 41 kg |