Featuring a six-fold parallel push-pull architecture with power MOS-FETs, as well as ideal gain allocation realized with discrete semiconductors in an instrumentation amplifier configuration, 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.

Warranty:

1-year manufacturer’s warranty

Features:

  • Power MOS-FETs in a 6-parallel push-pull configuration
  • Linear output characteristics over the entire load impedance range
  • Strong power supply with massive toroidal transformer and large 60,000 μF filtering capacitors
  • Instrumentation amplifier principle
  • High-gain signal input section in a discrete configuration
  • Dedicated power supply for the signal input section
  • Polarity switching for balanced input connectors
  • MCS+ circuit topologies
  • Current feedback principle in amplification circuitry
  • Protection circuitry using MOS-FET switches
  • High damping factor of 800
  • Speaker output protection circuit guards against short-circuiting
  • Two sets of large speaker terminals
  • 4-step gain control
  • Support for bi-amping and bridged mode
  • Aluminum top plate with hairline finish

Technical 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 2-ohm load, 0.03% with a 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