Accuphase A-75 Stereo Power Amplifier

₹ 2,249,999.00

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Ooberpad announces the availability of the power-packed Accuphase A-75 Stereo Power Amplifier. Instrumentation amplifier topology using discrete semiconductors realizes ideal gain allocation. Balanced Remote Sensing optimizes the efficiency of negative feedback. 10-parallel push-pull configuration in the power amplification stage. The overall result is an outstanding S/N ratio and amazingly high damping factor. Furthermore, constant-voltage drive manages even drastic speaker impedance fluctuations with utmost ease. Power MOS-FETs and other judiciously selected components and materials make this Pure Class A Stereo Power Amplifier a total delight to experience.


1-year manufacturer's warranty

Key Features:

  • Pure Class A stereo power amplifier with outstanding S/N ratio and very high damping factor
  • Rated for 60 watts into 8 ohms and 480 watts into 1 ohm
  • Power MOS-FETs in 10-parallel push-pull configuration
  • Instrumentation amplifier principle
  • All signal paths realized with discrete semiconductor components
  • Balanced Remote Sensing principle
  • MCS+ circuit topology
  • Current feedback amplification principle
  • Digital power value readout and bar graph voltage indication
  • Support for bi-amping and bridged mode

    Benefits of Accuphase A-75 Stereo Power Amplifier:

    High S/N ratio results in sparkling clarity
    High S/N ratio results in sparkling clarity

    The A-75 uses a balanced instrumentation amplifier circuit configuration throughout all amplification stages, minimizing susceptibility to noise and ensuring outstanding characteristics. The signal input stage is configured with discrete semiconductors as a push-pull circuit. This makes it possible to allocate a high gain of 22 dB (factor of approx. 12.6) to this section and conversely keep the gain of the power amplification section to a low 6 dB (approx. x2.0). As a result, even large signal amplitudes are conveyed accurately from the signal input stage to the power amplification stage, and noise components processed in the amplification stage are kept low. Compared to the previous model, this results in a noise reduction of 11%. S/N ratio is rated at an astonishing 122 dB (at max gain setting), which manifests itself in superb sonic clarity.

    Output power characteristics suitable for constant voltage noise
    Output power characteristics suitable for constant voltage noise

    A massive toroidal power transformer and large filtering capacitors (100,000 μF x 2) in the power supply ensure that plenty of power is available for handling high amplitude input signals, and large heat sinks efficiently dissipate any excess thermal energy. As a result, the power amplification stage is rated for a continuous 60 watts into 8 ohms, 120 watts into 4 ohms, 240 watts into 2 ohms and 480 watts into 1 ohm (music signals). This linear power progression demonstrates that constant voltage drive has been successfully realized. The maximum output rating is 131 watts into 8 ohms, 232 watts into 4 ohms, 370 watts into 2 ohms and 547 watts into 1 ohm (music signals). Although a Pure Class A Stereo Power Amplifier, the A-75 can easily drive even large and demanding speakers.

    Where to buy?
    Buy the Accuphase A-75 Stereo Power Amplifier online at the best price in Mumbai, Delhi, Bangalore, Chennai and all across India. Enjoy expert, prompt and courteous customer service from the Ooberpad team. We will help you choose better and give you all the support you need to take the right buying decision in India.

    Technical Specifications of Accuphase A-75 Stereo Power Amp:

    Brand & Model # Accuphase A-75
    Continuous Average Output Power (20 - 20,000 Hz)
    • Stereo operation (both channels driven): 480 W/ch 1-ohm load (*) 240 W/ch 2-ohm load 120 W/ch 4-ohm load 60 W/ch 8-ohm load
    • Monophonic operation (bridged connection): 960 W 2-ohm load (*) 480 W 4-ohm load 240 W 8-ohm load
    Total Harmonic Distortion
    • Stereo operation (both channels driven): 0.07% with a 2 ohm load 0.03% with a 4 to 16 ohm load
    • Monophonic operation (bridged connection) 0.05% with a 4 to 16 ohm load
    Intermodulation Distortion 
    • 0.01%
      Frequency Response
      • At rated continuous average output: 20 – 20,000 Hz +0 -0.2 dB
      • At 1 watt output: 0.5 - 160,000 Hz +0, –3.0 dB
      • 28.0 dB (GAIN selector in MAX position) (Stereo/monophonic operation)
      Output Load Impedance
      • Stereo operation: 2 to 16 ohms
      • Monophonic operation: 4 to 16 ohms
        *With music signals only, 1-ohm loads are permissible for stereo operation and 2-ohm loads for monophonic operation.
        Damping Factor
        • 1000
        Input Sensitivity (with 8-ohm load)
        • Stereo operation: 0.87 V for rated continuous average output 0.11 V for 1 watt output
        • Monophonic operation: 1.74 V for rated continuous average output 0.11 V for 1 watt output
        Input Impedance
        • Balanced: 40 kilohms
        • Line: 20 kilohms
        Signal-to-Noise Ratio (A-weighted, with input shorted)
        • 122 dB (GAIN selector in MAX position)
        • 128 dB (GAIN selector in –12 dB position)
        Output Level Meter
        • Digital power meter Indicates output power (W) with 5 digits Display range switchable AUTO/10W/100W/1000W
        • Bar graph meter Represents output voltage value (dB) using 38 points
        • Hold time 1 second / infinite (selectable) * With indication off switch
            Power Consumption
            • 260 watts idle
            • 520 watts in accordance with IEC 60065
            Maximum Dimensions
            • Width 465 mm ( 18.31")
            • Height 238 mm (9-3/7")
            • Depth 515 mm ( 20.28")
            • 43.9 kg ( 96.8 lbs) net

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