Superpower compared to Burson

NOTE: This page has not been updated for lower noise Superpower

How does Belleson Superpower compare with Burson Regulator regulator? We compare to the Burson Low Noise regulator shown here. The Burson is a production unit purchased from Parts Connexion, which also sells Belleson regulators. Both devices were tested using identical conditions, both using the same input supply and Vout = 9V for both regulators. After reading this comparison, please believe that we did our best to give this regulator an honest evaluation and this is what we measured. We even traced the schematic and ran simulations to see if we got a bad device, but simulation results were like the measurements.

Dynamic performance

The Burson regulator is not self–powered and, based on the output dynamics, is not much better than a LM78 type monolithic regulator. You can make your own conclusions from the oscillograms.

Burson regulator, 250mA pulse
Top trace is Vout at 9VDC, vertical scale = 0.1V/div. Bottom trace is V(load) = 2V step across 8 Ohms (250mA) in 4msec. Vout moves by hundreds of mV.

Superpower, 250mA pulse
Top trace is Vout at 12VDC, vertical scale = 0.1V/div. Bottom trace is V(load) = 2V step across 8 Ohms (250mA) in 4msec. Notice the constant Vout.

Ripple Rejection

The Burson regulator has the lowest ripple rejection of all frequencies we could measure. The input circuit was not able to process 5KHz input ripple so we could not measure at that frequency. The maligned LM7805 offers much better ripple rejection across the audio spectrum.

Ripple Rejection Comparison
Ripple rejection (PSRR) of 4 regulators, lower values are better. The graph shows the magnitude of Vout(AC) given a Vin of 12V(DC) + 0.5Vpp(AC). Vout(DC)=9V for all regulators except the LM7805, which is of course 5V out. Regulators were all equally loaded with a 220Ω resistor (54mA DC load).

SPJ78 PSRR at 5KHz

SPJ78 PSRR at 5KHz
Belleson SPJ78 regulator PSRR AC output with ½Vac(pp) input ripple at 5KHz riding on 12Vdc. Peak of fundamental is -95dB. Click the graph for a clear full size spectrum image.

Burson PSRR at 1KHz

Burson PSRR at 1KHz
Burson regulator PSRR AC output with ½Vac(pp) input ripple at 1KHz riding on 12Vdc. Peak of fundamental is -54dB, with harmonics like a fuzz box. Click the graph for a clear full size spectrum image.

Authorized Upgrade Centers

Always wanted to improve your system but modifying it makes you nervous? Now you can let a professional do it! Go to our Authorized Upgrade Centers page to find companies that can replace your existing regulators with Belleson Superpower.

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.

SPM is here!
lower current,
lower price

Now for sale on our order page—a new 225mA Superpower SPM that is very small and just as quiet and dynamic and awesome as our other regulators. And for almost 40% less money!

Barely bigger than a TO-220 package, the SPM fits into small spaces, it's great for clocks, reclockers, DACs and other applications where low current and high performance are important. See a press release here.

Pegasus Microphone uses Superpower


ronin appliedsciences use Superpower in the exceptional and beautiful Pegasus professional studio microphone. See more information here and here.

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