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Features
Controls and Indicators
Connections
Specifications
Warranty

Features

Power Factor Technology: Although it's rare for amplifiers to draw more than 4 Amps continuously, for superior performance it is vital that an amplifier's AC filter have low impedance and the capability to accommodate peak current demands far in excess of the RMS (continuous) current rating. The IT-Reference 20i's Power Factor Technology circuitry effectively creates a current reserve in excess of 80 amps (peak) that is cleaner and faster than a dedicated line from your local power station, benefiting any connected amplifiers' performance.

Discrete Symmetrical Power: While differential AC noise (such as electromagnetic and radio frequency interference) can be effectively reduced with a low-pass filter, common mode AC noise (the cause of ground loops and video hum bars) requires a more advanced solution. Effectively reducing common mode noise requires the use of an isolation transformer, the most effective of which is a symmetrically balanced isolation transformer. Furman's Discrete Symmetrically Balanced Power is achieved by routing the incoming AC into a 1:1 isolation transformer with a precisely placed center tap on the transformer's secondary. The incoming voltage (120V on the line terminal and 0V on the neutral and ground) is split into perfect halves on the transformer's output. The AC line now has 60V on the line and 60V on the neutral when referenced to the new center-tapped ground, which remains at 0V AC. What is significant about this is that the two 60V AC terminals are now in opposite polarity, completely canceling all common mode noise from the incoming AC line. This noise reduction is efficient and linear across a huge frequency range; the result is perfectly clean power devoid of ground loops and AC hum noise.

Series Multi-Stage Protection (SMP): SMP is maintenance-free surge suppression, offering AC protection without sacrificing itself in the event of a catastrophic surge. The SMP circuit senses voltages so high that operation is impossible and turns the power off before damage can occur; if the voltage exceeds 137 volts power is removed from all the outlets.

12 AC Outlets: The Furman IT-Reference 20i features 12 rear-panel outlets in five banks:

• Discrete Symmetrical Power: four banks of two outlets each are filtered with Discrete Symmetrical Power and GFCI protected; each bank is isolated from the others and from the high current bank
• High Current: four outlets, designed for amplifiers, receivers, and powered subwoofers; offers Power Factor Technology with a low impedance filter and current reserve in excess of 80 amps (peak) to accommodate amplifier demands

Transient Voltage Surge Protection: The IT-Reference 20i features transient voltage surge suppression for standard telephone lines, coaxial cable TV lines, and coaxial satellite lines. There is one pair of phone input/output jacks and three pair of coaxial input/output jacks. The coax jacks are bi-directional and pass both DC carrier signals and high bandwidth HD signals with an insertion loss of less than 0.1 dB. All the in-line surge suppressors feature Furman's exclusive Zero Ground Contamination technology; this helps eliminate audio buzzing and video hum bars that can result from typical in-line suppressors.

Rack Mount: Brackets are included to rack mount the IT-Reference 20i.

Controls and Indicators

Front Panel:

• Power: power switch; turns all outlets on/off
• Power LED: a blue LED bar in the center illuminates when the power switch is on and voltage is applied to the outlets
• GFI Test: button to test the Ground Fault Circuit Interrupter

Rear Panel:

• Reset: button to reset GFCI circuit

Connections

Rear Panel:

• Discrete Symmetrical Outlets: eight 3-prong outlets (standard NEMA 5-15)
• High Current Outlets: four 3-prong NEMA 5-20R T-Slot outlets
• Phone Jacks: input and output for standard telephone line
• Coaxial Jacks: 3 pair of threaded F-type coax input and output terminals

Specifications

AC Power:

• Current Capacity:
  • Input: 20 amps
  • Output: 12-20 amps RMS (continuous, all outlets combined)
• Linear Noise Attenuation:
  • Transverse (Differential) Mode: from 0.05 to 100 ohm line impedance
    • 1 kHz - 2 kHz: >20 dB
    • 2 kHz - 100 kHz: >40 dB
    • 100 kHz - 1 GHz: >80 dB
  • Common Mode:
    • 10 kHz - 50 kHz: >95 dB
    • 100 kHz - 1 GHz: >40 dB
• Power Consumption: 8.5 watts for display and control circuits (plus actual load)
• Over-voltage Shutoff Threshold: 137 volts AC (+/-3 volts)
• Weight: 83 pounds

Warranty

Connected Equipment: Furman Sound's Connected Equipment Warranty covers equipment that is damaged by a transient voltage while properly connected through the Furman IT-Reference 20i to a properly wired AC power line with a protective ground in an indoor location. Furman's Connected Equipment Warranty is limited to the amount of the deductible on the Purchaser's personal property insurance policy, up to $500.00. The Connected Equipment Warranty is in effect for a period of five years.