MA258 Integrated Audio Amplifier with Phono preamp

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The MA258 is a Integrated Audio Amplifier with RIAA Phono preamp built in. It has three selectable stereo inputs phonograph, RCA and a 3.5mm jack for phones or tablets. The MA258 also has a very well designed headphone output so it can be used as a stand alone headphone amplifier. The MA258 was designed to have the highest level of sound quality, whether you are using it as a headphone amp or with speakers. At every design stage we spent a considerable amount of time focused on one thing, sound quality.

MA258 Integrated Audio Amplifier with Phono preamp

  • Integrated Amplifier
  • Built in Headphone Amplifier
  • Low noise, efficient operation
  • Class D high efficiency amp


  • Line Input Impedance: 10K Ohms
  • Power Output: 20 Watts RMS one CH driven (4 Ohms)
  • 12 Watts RMS both CH driven (8 Ohms)
  • Maximum Supply Voltage: 24 VDC
  • Voltage Gain: 30 dB Line
  • THD: .05% typical
  • EIN: 3 mV
  • Efficiency: 85%
  • Input Sensitivity: 28 mV
  • Bandwidth: 20Hz - 25 kHz +/- 3dB
  • Weight: 1.6 lb.
  • Size: 6.75" x 3.5" x 1.5"