Bellari PA555 – Preamplifier


  • Input Impedance: 10K ohms
  • Max Output Gain: 11.1 dB
  • THD: 0.1%
  • S/N Ratio: 103 db, unweighted
  • Frequency Response: 5 Hz – 198 KHz +/- 3 db
  • Crosstalk: -75 dB
  • Output impedance: 100 Ohms
  • Tube: 12ax7
  • RCA Inputs: 3
  • 5mm Inputs: 1
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PA555 – Preamplifier

Bellari incorporated in 1989 with a clear objective to re-establishing the relevance of ‘made in the USA’.  Accordingly,  we are building the highest quality hand built, affordable, audio equipment.  All this is for our regular consumers without bottomless wallets. Welcome to Bellari Audio.

How many times have we all heard the left-handed compliment about an audio component when someone says it sounds really good for the money?  The inference is that even though it sounds really good, it doesn’t sound all that good because it just doesn’t cost as much as the high-priced spread. I’m going to get right to the heart of things.   I’ll tell you that the Bellari PA555  tube preamp doesn’t just sound “good for the money.” The PA555 sounds “good for any money.”

The PA555 uses a 12AX7 tube running at 150 volts. The input signal is connected directly to the grid of the tube.  Basically all of the gain of the PA555 is from the 12AX7 tube. The output section is a pair of emitter followers to drive the output.   As a result the PA555 has a no feedback circuit or integrated circuits in the audio path, it is all analog.

Thank you for purchasing the PA555. We hope you enjoy using the PA555, and that it makes listening to your music collection rewarding. We sincerely appreciate the opportunity to build a product for you and participate in your love of quality music and sound.  The folks at Bellari love what we do and we’re happy to help. Emphatically, all Bellari products are hand built in Salt Lake City, Utah by people who care about high quality music.

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