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Furman IT-Reference 20i

Power line conditioner and surge protector with isolation transformer

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  • Furman IT-Reference 20i

    Front

  • Furman IT-Reference 20i

    Back

  • Furman IT-Reference 20i

    Front, angled view

  • Furman IT-Reference 20i

    Isolation transformer

  • Furman IT-Reference 20i

    With chassis cover removed

 

Our take on the Furman IT-Reference 20i

by Steve Kindig
Furman

Rock-solid protection for your home theater investment

The IT-Reference 20i thoroughly cleans and conditions the AC power that is every audio/video component's lifeblood. Its twelve rear-panel AC outlets can accommodate 20-amp or standard 15-amp AC plugs. Furman got their start by developing equipment to meet the extreme AC power demands of professional recording, film, and broadcast studios. The IT-Reference 20i is Furman's biggest and baddest power conditioner — this heavyweight tips the scales at 83 pounds!

Isolation transformer

An isolation transformer regenerates pristine AC power for your most sensitive gear
All electronic components operate best with a steady supply of clean AC power, and high-definition video equipment like Blu-ray players, flat-panel TVs, and projectors are notoriously finicky. The IT-Reference 20i addresses this issue with a built-in "isolation transformer" that feeds noise-free regenerated power to two of the rear-panel outlets. That puts a stop to noise-inducing ground loops, and power supply backwash between connected components. Expect to see noticeably improved picture detail and deeper black levels.

Power Factor Technology: Like a turbocharger for your amplifiers
Truly exciting sound requires wide-open dynamics. To reproduce instantaneous sonic peaks or "transients" cleanly, like a car crash or a cymbal crash, an amplifier needs lots of high-current power. During these moments, amplifiers — including those in receivers and powered subwoofers — may require more current than is available from your home's AC line. Solution? Plug your amplifier into one of the IT-Reference 20i's high-current outlets. Furman's unique Power Factor Technology creates a "current reservoir" capable of delivering over 80 amps of peak current. Your amplifier gets the current it needs when it needs it most.

Continuous power monitoring, protection for every pathway
The IT-Reference 20i constantly monitors incoming AC, and if an overvoltage condition is detected, power is automatically shut off to all connected equipment. And Furman's rugged surge suppressor circuitry can withstand multiple catastrophic high-voltage spikes and keep right on protecting your system. Three sets of coaxial inputs and outputs protect your satellite, cable TV and antenna connections. And one pair of protected jacks prevents spikes from sneaking in through your phone line.

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Highlights:

  • 12 AC outlets with five isolated banks:
    • one bank of 8 Discrete Symmetrically Balanced Power outlets for sensitive audio and video components (unswitched)
    • one bank of 4 high-current outlets with Power Factor Correction peak current charging (unswitched, compatible with 15-amp and 20-amp AC plugs)
  • AC outlets use hospital-grade connectors to grip plugs firmly
  • Series Multi-Stage Protection surge suppression system can withstand multiple catastrophic voltage spikes
  • Extreme Voltage Shutdown circuitry monitors incoming AC and automatically cuts off power to connected equipment if overvoltage is detected
  • Power Factor Technology "current reservoir" for amplifiers, receivers, and subwoofers (over 80 amps peak charge)
  • wide-bandwidth EMI/RFI noise filtering for clearer sound and picture
  • 3 sets of coaxial RF connections for cable TV, satellite, and antenna
  • RJ-11 phone line input and output (module is detachable)
  • two power cord options: 15-amp plug or 20-amp plug
  • maximum current rating: 20 amps
  • 17"W x 5-7/8"H x 18-3/8"D
  • weight: 81 lbs.
  • warranty: 5 years
  • Our 60-day money-back guarantee

Hands-on research from the Crutchfield Labs (what are the Labs?)

Features and Specs
Type
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Component
Total AC Outlets
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12
High-Current Outlets
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4
USB Connections
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None
RF-EMI Filtering
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Yes
Joule Rating
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N/A
Powerline Network Compatible
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No
Connected Equipment Guarantee
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$500 deductible
Width (inches)
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17
Height (inches)
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5-7/8
Depth (inches)
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18-3/8
Weight (pounds)
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81
Parts Warranty
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5 Years
Labor Warranty
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5 Years
Product Research
What's in the box?

Download owner's manual

  • Power Conditioner
  • 7' AC power cord with standard NEMA 5-15 plug
  • 7' AC power cord with NEMA 5-20P plug (requires 5-20R T-Slot receptacle)
  • 2 Piece power cord bracket
  • 2 Machine screws
  • 2 Rack mount brackets
  • 6 Rack mount machine screws (each with star lock washer attached)
  • Owner's guide (English/ French)
  • Warranty registration card

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team — they open the box, verify contents, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

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.

 

Product reviews from the Crutchfield Labs (what are the Labs?)

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For a more in-depth review and enhanced detailed information on the Furman IT-Reference 20i, please visit the Crutchfield website product page (/ISEO-rccbcspd/p_756ITREF20/Furman-IT-Reference-20i.html ).

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