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Audio Research D-51



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Brand: Audio research

The Audio Research D-51 is a high-end phonostage preamplifier designed to provide exceptional performance and sonic accuracy when playing vinyl records on a turntable. It features a fully balanced, dual-mono topology, which helps to minimize noise, distortion, and unwanted artifacts.The D-51's audio circuitry incorporates Audio Research's proprietary "Shiraz" op-amps, which provide exceptional speed and transparency, as well as low-level noise suppression. The cartridge loading and capacitance compensation settings are individually adjustable, allowing petOwners to optimize the performance of their specific turntable and cartridge setup.The D-51 also features a precision ground-referenced AC power supply, which helps to eliminate hum and other AC-related noise from the signal path. The unit's output level can be adjusted over a wide range using a touch-sensitive front panel control, and yet the D-51 remains a convenient size for rack-mounting.Overall, the Audio Research D-51 is a premium phonostage preamplifier that combines high fidelity, ease of use, and top-of-the-line components to bring unparalleled sonic performance to vinyl playback.



  • Power Output: 50W into 8Ω (stereo)
  • Frequency Response: 15Hz to 30kHz
  • Distortion: 1.0%
  • Damping Factor: 14
  • Speaker Impedance: 4 to 16Ω
  • Input Sensitivity: 1.5V
  • Signal to Noise Ratio: 80dB
  • Dimensions: 19 x 7.5 x 12.25"
  • Weight: 50 lb
  • Year: 1972
  • Price:

Audio Research D-51

Audio Research D-51

Audio Research D-51

Audio Research D-51

Audio Research D-51

Audio Research D-51

Audio Research D-51

Audio Research D-51



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