Bellari PA253 Stereo Power Amplifier


  • Nominal Output Power 50 watts RMS @ 4 ohms — 42 watts RMS @ 8 ohms
  • Power Stage Gain: 32.6 dB @ 8 ohms — 31.4 dB @ 4 ohms
  • Input Impedance: 10k – 5Hz to 100kHz
  • Connection Output Impedance: 4 to 8 ohms speakers
  • Output Impedance: < 0.32 ohms from 20 Hz to 20 kHz (Measured under 8 ohms)
  • Dampening factor: > 100
  • Frequency Response: 3Hz to 43kHz
  • Phase shift: 0 Deg.
  • Volume Max gain: 33.7 dB no load
  • THD: .015% @ 1KHz
  • Rise Time: < 0.9 µs
  • Slew Rate: > 20 V/µs, peak-peak
  • DC Output Voltage: ± 0 mV
  • Crosstalk: < – 95 dB from 20Hz to 20kHz
  • S/N Ratio: >100 dB unweighted
  • PWR: 24 VDC @ 4A (KS100DU) Included.
  • Power efficiency: 90%
  • Size: 5.5″w x 3.5″d x 1.25″h
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Beallari PA253 Stereo Power Amplifier

PA253 Stereo Power Amplifier – 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. Bellari has been building commercial grade recording studio tube gear for over 30 years.

We spent a considerable amount of time designing and developing the Bellari PA253. Please enjoy using the PA253, and let it make listening to your music collection rewarding. We sincerely appreciate the opportunity to build a product for you.  Thank you for allowing us to participate in your love of quality music and sound. Obviously, we love what we do and we’re happy to help. Bellari builds all its products by hand in Salt Lake City, Utah.  Our people care about high quality music.


Ballari makes the chassis in Salt Lake City, UT. US labor  cuts, bends, forms, and finishes all the steel sheets. After that process US labor powder coats the steel to a high gloss red. We silk-screen the chassis and assemble the PCB′s at our Salt Lake City factory.  Bellari flow solders the PCB′s. Then we send them to post flow assembly where we add the fragile components, soldering them in by hand. We test the PCB′s and send them to mechanical assembly.  We complete the Bellari PA253 and then test again. In addition, the facility that makes the boxes that we use is just a few miles from us. Even the out bound shipping boxes, biodegradable peanuts and printing materials are made in the US.

Yes, some of the parts used like the power adapter, jacks, knob, and IC′s are not made by us. They   come from countries other than the US. We pride ourselves on keeping as much as we can in the US including 100% of the product development and design.



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