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.

• Power MOS-FETs in 6-parallel push-pull configuration
• Linear output characteristics over 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 discrete configuration
• Dedicated power supply for signal input section
• Polarity switching for balanced input connectors
• MCS+ circuit topologys
• 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

• 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