Accuphase A-48S Class-A Stereo Power Amplifier (50W/ch)

The A-48S is the most compact way into Accuphase's Class A power amplifier lineup, aimed at listeners who want that sound without stepping up to the largest chassis sizes.

A 6-parallel push-pull MOS-FET output stage keeps things running fully in Class A for 50 watts per channel into 8 ohms, scaling up to 400 watts into 1 ohm for tougher speaker loads. A large toroidal transformer and 68,000uF of filtering capacitance keep the power supply stable under demand, and a damping factor of 1,000 keeps bass tight and controlled.

• 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