Balanced Studio Power Supply
Australian made

Clean up your mains power! And clean up your sound.

(Manufactured Under License for Peach Audio)
Ring: 0438 372 329 or email: david@peachaudio.com

The Balanced Studio Power Supply converts conventional unbalanced single-phase mains power to symmetrical balanced power. As a power supply for a studios audio equipment, this eliminates most of the spurious components in a studios mains supply, providing a clear, solid earth. By eliminating reactive current in the earth, this lowers the studio noise floor, extends frequency response and improves stereo imaging.

  • 1000 or 2000 VA rating (higher models custom made)
  • Provides True Balanced 240V Power
  • Removes Power Line Noise
  • Eliminates Ground
  • Loops in House Wiring
  • Reduces Radiated Fields from Power Cords
  • Soft Start Protects Equipment From Turn-On Surges
  • Less Than 2 Hours Assembly Time
  • Reduces Interference Between Equipment
  • Temperature/Overload  Protection

Why do I need it?
All our local main power distribution is unbalanced. So its vulnerable to interference in the same way as unbalanced audio lines, and there is plenty of interference to pick up: from motors, fluorescent lights, switch-mode power supplies and dozens of other reactive loads. All of these feed spurious harmonics and out of phase components back into the mains. The more devices on the circuit, the more these reactive currents can go into the earthing system. The resulting noise in your grounding system is a major contributor to a studios “noise floor”- that stubborn residual noise and hum you just cant get rid of, Star earthing scheme, power conditioning and cable routing cant solve it. The Balance Studio Power Supply eliminates these reactive power components in exactly the same way as balanced audio circuits eliminate external noise. The reactive currents in a balanced power circuit sum to zero at the power supply’s earth.

You will immediately notice everything is quieter. There is an audible improvement in frequency response and stereo imaging. Even digital transfers are cleaner.

How does it remove power line noise?
Transformers only respond to voltage differences between their leads.  Power lines often have a type of noise called common mode noise which is present on both the neutral and hot wire.  The Balanced Power Supply contains a massive toroidal transformer that reject much of this noise.

But what about noise on just the hot wire?
The output of the Balanced Power Supply contains heavy filtering to eliminate much of this noise.  Often times, audio equipment itself generates noise that gets fed back into the power line.  The noise is then free to invade other equipment.  Power amps with laminated power transformers can be the worst offenders.  The heavy filtering on the output can help to eliminate much of this noise.

What is a ground loop?
A ground loop occurs when different equipment grounds are at different voltages, causing noisy ground currents to flow between them.  The Balanced  Power Supply creates a new ground called a derived ground, that decouples equipment connected to it from these circulating ground currents in the rest of the house wiring.  It also provides one common ground reference for all the equipment connected to it.

How does it reduce radiated fields?
Because the power is delivered by two out of phase signals, the electric fields produced by each should largely cancel.  This reduces noise caused by radiated fields.  This is same principal used with twisted pair cable but in reverse.  Instead of rejecting noise, power carrying cables don’t radiate noise in the first place.

How does if reduce interference between equipment?
Most modern electronic equipment uses switching regulators in their power supplies.  These devices can produce RF noise that can couple through the power cord to other equipment.  The balanced power supply provides a very low impedance to the connected equipment which shorts out this high frequency noise.  Some users have reported improvements in large screen video performance.

How does the unit provide a soft start?
By using a simple and reliable thermal device, inrush currents on start up are greatly reduced.  As the thermal device heats up in a few seconds, normal power currents are restored.  Very simple.  Very effective.

Installation:
The power supply simply plugs into any single phase general purpose outlet. All your audio equipment should then be connected to its built-in socket. Every thing will work exactly as normal.

ONE IMPORTANT THING TO NOTE:

RCDs (Safety Switches) are only effective if they are plugged into the supply. Safety switches on your main switchboard will NOT protect equipment connected to the power supply. We recommend you use an appropriate safety switch on the power supplys output socket.

Benefits

  • Lower studio noise floor by up to 15dB.
  • Dramatically improves stereo imaging.
  • Extends frequency response.
  • Reduces listener fatigue.
  • Eliminates video hum bars.
  • Reduces mains noise problems in class A valve amplifiers & noisy guitar amps.
  • Solves most earth loop problems without compromising safety earths.

Key features

  • Soft start.
    Over temperature  protection – self resetting.
  • Overload protection by 10A HRC industrial fuse.
  • Electrostatic shielding.
  • RFI filtering.
  • Made to Australian standard AS 3108-1994.
  • 3 years conditional warranty (as long as it is used within specifications)
  • Professional backup service.

For Pricing or Quote:
Ring: 0438 372 329 or email: david@peachaudio.com

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Item 1 – Cast Resin type Isolation Transformer

HV Winding 1

LV Winding 1

LV Winding 2

Rated power

kVA

315

1250

1250

Rated voltage

kV

33

0.48

0.48

Frequency

Hz

50

Off circuit tapping links

%

±2.5%, +-5%

Nil

Nil

Connection

Delta

Star

Star

Vector group

Dy11y11

Insulation level (Maximum BIL/AC)

kV

150/70

10/3

10/3

Winding material

Aluminium cast windings in quartz filled self-extinguishing epoxy resin

Aluminium cast windings in quartz filled self-extinguishing epoxy resin

Aluminium cast windings in quartz filled self-extinguishing epoxy resin

Type of winding

Vacuum Resin Cast

Vacuum Resin cast

Vacuum Resin cast

Standard

AS 60076-11, AS 2374

Installation

Indoor

Degree of protection

IP22

Type of cooling

AN/AF

Installation altitude

< 1000 a.m.s.l

Climatic/environmental

And fire behaviour class

E2-C2-F1

test