Superpower, the ultimate voltage regulator

"The best solution is a well-designed power supply in the audio gear itself." Ed Simon's conclusion of a 5 part article on cleaning up AC power lines in AudioXpress, Aug - Dec 2008.

Superpower PC board

Now you can have the best solution! Today's 24 bit and higher circuits demand the best voltage regulation, and the Belleson Superpower gives it to you. The patented design fully isolates almost all circuitry from the input voltage, providing the best line regulation possible. The innovative design delivers current faster and cleaner than ever before available, with the lowest possible output impedance!

Bootstrap powered by its own clean, quiet output voltage, the Superpower has amazing load regulation, low noise and dynamic performance, delivering 2+ Amps of output current.

You may have heard of a "super regulator" designed by noted engineer, author and audiophile designer Walt Jung. Mr. Jung's design and several variations, while excellent, have been improved.

The Belleson Superpower regulator, like Mr. Jung's design, uses the regulator's cleaned and quieted output voltage as the "bootstrapped" power source for its own internal reference and error amplifier. In addition,

  • It is stable with the included 10µF output capacitance and remains stable with larger values.
  • Output voltage is set with a single resistor.
  • Superpower fits a 3 terminal regulator footprint and can bolt directly to a heat sink.
  • Start-up is guaranteed— the expected output voltage is the only stable state.
  • Gain/bandwidth of the internal amplifier is independent of output voltage.
  • Drop-out voltage is as low as 1V at currents to 2A for the SPJ version.
  • Superpower performs better without a pre-regulator.
Click the spectral graph to see more information on line regulation:I/O spectrum, 300mA loadClick the oscillogram to see more information on load regulation:
Dynamic response, 1A pulse


This site is being gradually updated. If you have any problems please email

The Industry Standard SPX

Order now from our store.

  • 5V to 30V output
  • World's lowest output impedance
  • Superb ripple rejection (135dBV)
  • Instant step response
  • Extreme low noise
  • TO-220 footprint
  • No thermal pad needed!

High Voltage!

Tube lovers—SPHV is BACK!

  • Variable output 5V to 450V
  • Up to 500mA output current
  • Super low 0.5V drop-out at 100mA
  • Small TO-220 footprint!
  • Low output impedance
  • Fast response
  • Low noise

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SPHP—1000 Watts for your music server!

SPHP, a 10A Superpower with adjustable output voltage from 5V to 100V

  • Same low noise
  • Same blazing step response
  • Same great ripple rejection.
Just lots more current and much higher output voltage. For sale on our order page See more information in the data sheet here.

Build a power supply

A PCB and parts list for building a compact dual positive or positive+negative power supply are on this new page.

Transformer Calculator!

Use the Belleson Transformer Calculator to calculate the minimum Vrms voltage of a transformer for your Superpower based supplies.

It's Official

We're proud to announce the U.S. Patent and Trademark Office has granted patent 8,294,440 to the Superpower design.

Use the Superpower regulator in...

  • Headphone amps
  • DACs
  • Buffers
  • Clocks and reclockers
  • Preamps
  • Microphone preamps
  • Phono stages
  • Phono motors
  • Tube preamps and input stages
  • Line powered guitar effects boxes
  • Anywhere an extremely clean, quiet, dynamic power source is needed