Features

• Provides precisely balanced AC power for ultra-low-noise installations.
• Typically gives a 16 dB improvement in background noise floor in systemwide installations.
• Toroidal transformer with center-tapped secondary is the most efficient, compact design, with least magnetic field leakage.
• Soft Start circuit prevents turn-on transients and high inrush currents.
• Faraday shield reduces electrostatic coupling between primary and secondary.
• Extreme Voltage Shutdown circuit protects against dangerously high or low input voltages.
• Microprocessor-controlled "smart" AC voltmeter monitors line voltage, flashes alerts for marginal and extreme conditions.
• Provides basic power conditioning functions (spike suppression, RFI filtering)
• Ground fault interrupter (GFCI) protection.

Product Information/Specs

Output current: 20 amps (2400 watts at 60/120 V 1 phase AC, 60 Hz)
Voltage Ranges: Normal, 90-130; Marginal (flashes alert), 80-90 or 130-140 Extreme (causes shutdown), below 80 or above 140
Spike Response time: 1 nanosecond
Maximum spike energy: 80 joules per mode, 240 joules total
Dimensions: 5.25" H x 19" W x 17" D. Weight: 65 lbs (30 kg).
Construction: Steel chassis, powder coated; glass epoxy printed circuit boards

Almost everybody has done a show in a venue that no matter how hard you try, there is always some sort of buzz or other noise. There is one gig in particular, that was very frustrating for us. No matter what we did there was always some sort of buzz. We had the chance to demo the new balanced power unit from Furman Sound. It claimed to provide a lower noise floor and higher isolation from general noise and buzz. We gave the unit it’s own 20 amp circuit from our power distro. We put all of the stage power, consoles and processing in the Furman balanced power unit and got ready for the sound check. There was no noise or buzz! It was dead silent.

A few weeks later, I did a live recording for a band. The sound company had a nasty buzz in their system, so I asked them for my own circuit, and proceeded to set up my own system. There was absolutely no noise in the final recording, despite the AC noise heard in the main hall, and the band was thoroughly impressed. The theory behind this seems pretty straight forward. Power out of the wall has 1 hot leg of 120 V, 1 Neutral, and 1 Ground. The Balanced Power unit transforms the power to one leg of +60 V and one leg of -60 V, and those are referenced to ground. Just like a balanced audio line reduced the reception of external noise, so does the balanced power. This unit is in our rental stock, so if you would like to do a mix and have everything quiet, let us know.

Visit the Furman Website to learn more details about the IT-1220.

If you would like Information on this or any other equipment, please contact Klay@Klay.Com or dial (in US) 1-800-FOR-KLAY.