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Music Hall - Bellari PA 555 - Tube Pre-Amplifier is available to buy in increments of 1

Music Hall - Bellari PA 555 - Tube Pre-Amplifier

Music Hall - PA 2.2 - Phono Preamplifier

Music Hall - Bellari PA 555 - Tube Pre-Amplifier

The bellari pa555 is pure simple fun. Imagine being able to add a single tube and volume control between your source and your amp. The result is clear unadulterated natural tube sound. The PA555 is a unique product that offers exceptional performance in a tiny little package that’s a tube rollers pleasure dome.

The PA555 uses a single 12AX7 tube running at 150 volts. The input signal is connected directly to the grid of the tube and all of the gain of the PA555 is from one 12AX7 tube. The circuit produces a whopping gain of 11.1dB. The PA555 has no feedback or integrated circuits in the audio path. It’s a pure analog gem.


  • Input connectors: 1x 1/8″ TRS Stereo jack; 3x RCA Stereo jacks
  • Output connector: RCA Stereo
  • Power: 15 VDC 500mA
  • Size: 6″w x 2.5″h x 5.4″d
  • Dimensions: w6″ x h2.5″ x d5.4″
  • Weight: 2 lb.


Input Impedance 10k Ohms
Output Impedance 100 Ohms
Max Output Gain 11.1dB @1kHz @ 0.1% dist
THD 0.01%
S/N Ratio 103 dB, unweighted
Crosstalk -75 dB
Frequency Response 5 Hz - 198 kHz +/- 3 dB
Tube 12 Ax7
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