Furman IT-Reference 20i Owner's Manual

Before unpacking your unit, inspect the carton for any obvious severe damage to the box and internal protective materials. 

If internal damage is likely, contact the carrier who delivered the unit before proceeding with unpacking. If, after unpacking, 

shipping damage is evident, contact the carrier. Save all shipping and packing materials.  You may need them if you should 

ever have to return the unit to the factory for servicing.

The box should contain the IT-Reference 20i unit, detachable AC cord, rack mount kit, owner’s manual, and warranty 

registration card.  If anything is missing, please contact Furman Customer Service.  Fill out and return your warranty 

registration card.  Registration is recommended because it can be used to establish whether the unit is within the warranty 

period should your original ownership documents be lost, and it assists us in informing you about upgrades or other vital 

information.   

Please read and observe all of the safety and operating instructions before the IT-Reference 20i is operated. Retain these 

instructions for future reference.

•   Do  not disassemble or modify in any way.  No user-serviceable parts inside .

•   Keep away from moisture and avoid excessive humidity.

•   Do not allow liquids or foreign objects to enter the unit.

•   Household lighting equipment may not be connected to the IT-Reference 20i because their sockets are not designed for use 

with symmetrical power and may present a shock hazard.  We recommend that only audio, video and computer processing 

equipment be connected to the IT-Reference 20i.

The IT-Reference 20i should be serviced by qualified service personnel when:
•   The power supply cord or plug has been frayed or cut.

•   Objects have fallen onto or liquid has spilled into the unit. 

•   The IT-Reference 20i has been exposed to rain or other moisture.

•   The IT-Reference 20i does not appear to operate normally, or exhibits a marked change in performance.

•   The IT-Reference 20i has been dropped, or the enclosure damaged.

The power source to which the IT-Reference 20i is connected should be adequate for use at 20 Amps. Though the system 

may function with a 15 Amp panel circuit breaker, nuisance circuit breaker tripping could result at your service panel.  If your 

system includes multi-channel audio power amplifiers that require more than modest power demands, a circuit breaker with a 

rating of at least 20 Amps is essential for optimum performance. If other electrical loads are used on this same AC line, and the 

continuous load from your equipment is in excess of 10 Amps, we recommend a 30 Amp circuit breaker wired with #10 gauge 

wire.  For installations which must comply with NEC codes, a dedicated 20 Amp circuit is the minimum requirement.  If in 

doubt, consult your local electrician.  In rare instances, two or more IT-Reference 20i’s may be required for the most ambitious 

5.1 and 7.1 home theater systems with continuous current draw well in excess of 20 Amps (consult your sales professional, or 

Furman Sound technical assistance).  

The IT-Reference 20i is manufactured with four rubber feet for placement on any table, cabinet, shelf, or floor capable of 

supporting its 83 pound weight.  These feet may be easily removed with a standard Philips screwdriver when rack mounting 

adjacent to other components.  Because of the IT-Reference 20i’s internal shielding, placement or proximity to other 

components is not critical, and the IT-Reference 20i does not produce any appreciable heat under standard use.  The IT-

Reference 20i may also be rack mounted in a standard 19” rack by attaching the IT-Reference 20i rack ears.  These rack ears 

(contained within the plastic rack kit package) mount flush with the back edge of the IT-Reference 20i’s front panel.  They are 

attached to the chassis by removing the (3) countersunk screws on each forward-side of the chassis top cover. Each rack ear is 

installed with pan-head Philips screws contained within the IT-Reference 20i rack mounting kit.  Due to the weight of the IT-

Reference 20i (83 lbs.), it is recommended that placement be at or near the bottom of your rack when mounting this way.