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PA550 Phono Preamp + Headphone Amp w/ 3 Channels + Tone Control

SKU eq-1362

phono preamp w/ selectable stereo inputs + tone controls
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Lab Overview


  • phonoĀ preamp w/ (3) selectable stereo inputs + tone controls
  • can be used as a standalone headphone amp
  • rotary bassĀ +Ā trebleĀ controlsĀ allow custom equalization, aĀ rare feature not commonly found in preamps
  • RCA + 3.5mm inputs for connecting two sources (tablet, phone, DAC, or other player)
  • ultra quiet, custom designed power supply
  • rotaryĀ volumeĀ control on front side
  • gold-plated RCA inputs and outputs
  • all metal casing
  • handĀ built in Salt Lake City, Utah

"The PA550 audio Pre Amplifier has three selectable stereo inputs: phonograph, RCA and 3.5mm (1/8") jack for phones, tablets or other. It features a very powerful headphone amplifier so it can be used as a stand alone headphone amp. Designed to have the highest level of sound quality, whether you are using it as a headphone amp or sending music to your amplifier. At every design stage we spent a considerable amount of time focused on one thing, sound quality." - Bellari


  • gain: Line 16.4 dB gain @ 1kHz /Ā Phono 56.6 dB gain @ 1kHz
  • input Impedance: 22k line and 47k Phono
  • output impedance: 8 to 600 ohms Headphone,47 ohms RCA
  • frequency response: 3Hz to 36kHz
  • THD: .005% @ 1KHz
  • S/N Ratio: >94 dB unweighted
  • dimensions: 5.5"w x 3.5"d x 1.25"h / 140 x 89 x 32mm
  • weight: .8 lbs / 362g


  • power supply
UPC: 675889005509

Review & Q+A


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