Isolated Symmetrical AC Power Conditioners
MODELS: RI-1210 (10 AMP)
RI-1220 (20 AMP)
Instruction Sheet
Introduction
Thank you for purchasing a Furman Sound Reference Series Isolated Symmetrical AC Power Condi-
tioner, and congratulations on your choice. The RI-1210 and RI-1220 are no-compromise, no-expense-
spared designs, with painstaking attention paid to the ultimate sonic and visual impact of every compo-
nent within each unit. The Reference Series is the flagship AC power regulating and conditioning line of
Furman Sound, a company that has been creating AC power products for the most demanding profes-
sional audio and video professionals for more than 25 years.
Features
•
Isolated Symmetrical AC Power technology dramatically reduces common mode and transverse
AC line noise, typically up to 24dB per total system. All Symmetrical (balanced) AC receptacles
are individually ground fault (GFCI) protected to ensure safe operation.
•
Includes four sets of positive contact “Super Spec” AC receptacles with additional filtering for
digital components.
•
Handles 20 Amps (RI-1220) or 10 Amps (RI-1210) continuous power.
•
The specially constructed toroidal transformer is the finest available, yielding extremely low mag-
netic field leakage, and D.C. tolerant, noise-free operation regardless of load or AC source con-
tamination.
•
A precision, high-inrush magnetic circuit breaker/power switch provides maximum protection
without false tripping while maintaining noise-free, low-contact-resistance operation.
•
Precision digital AC voltmeter monitors incoming AC line voltage.
•
Static discharge AC ground circuit for high-elevation installations.
Description
In the home theater/audiophile domain, the need for clean, noise-free AC power is nothing new. But
the RI-1210 and RI-1220’s unique technology and implementation are.
Many competing designs that claim to reduce AC line noise rely on multiple-pole RFI filters; cheap, in-
adequate AC outlets; high-resistance thermal circuit breakers; or unrealistic performance from ferrite
beads. Unfortunately, these designs can and
frequently do
add ground noise, create AC line distortions
such as ringing and gross phase shifts, and raise the AC line impedance to an unacceptable level.
Others use more sophisticated means of electronically turning AC power to DC, then synthesizing a
clean AC signal from there. Though this method has its merits for low-current demands, it is highly inef-
ficient, can contain non-linear distortions, and at minimum does nothing to reduce AC ground contamina-
tion from the incoming power line.
