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P-2400 AR OWNER’S MANUAL
FURMAN P-2400 AR FEATURES
True RMS Voltage Regulaon • -A 20 amp ultra-low noise toroidal autoformer with microprocessor control
SMP• (Series Mul-Stage Protecon) with EVS (Extreme Voltage Shutdown)
LiFT• (Linear Filtering Technology) with zero ground contaminaon
Twelve regulated rear panel NEMA 20 amp AC outlets (and two NEMA 20 amp outlets on the front panel)•
Very low stray magnec eld leakage•
Dimmable/Switchable true RMS digital ammeter and laboratory precise voltmeter•
Tri-color voltage range indicator (complements numerical voltage reading - even when viewed at a distance from the display)•
Front panel USB connector charges most portable media devices and cell phones•
20 amp (2400 wa) current capacity; output capacity 16.5 to 20 amps•
Robust 12awg. 10 foot AC cord •
Five year limited warranty•
INTRODUCTION
Thank you for purchasing a Furman Presge Series Voltage Regulator/Power Condioner, and congratulaons on your choice. The
Presge Series P-2400 AR features Furman’s True RMS Voltage Regulaon, Series Mul-Stage Protecon (SMP) circuit, and our exclu-
sive Linear Filtering Technology (LiFT). Together, these technologies comprise precisely what our customers have grown to expect from
Furman: uncompromised protecon and puricaon. The P-2400 AR has been precisely engineered to more than meet the crical
demands of recording studios, broadcast facilies, and discerning musicians alike.
The Furman P-2400 AR is intended to protect sensive electronic equipment from problems caused by AC line voltage irregularies—
brownouts or over-voltages that can cause audio tonal changes, digital equipment malfuncon (such as loss of MIDI programs or other
data), or, in extreme cases, permanent damage. It accepts input voltages over a wide AC voltage range and converts them to a steady,
stable output of 120V, plus or minus ve volts. Voltages approximately ±10% beyond the capture range may be converted to usable
levels, depending on the requirements of the equipment. This stable voltage protects equipment and allows opmal performance. If
you frequently move your rack to dierent locaons, derive power from generators, use excessively long extension cords, travel inter-
naonally, or are in an area prone to brownouts, you will benet from the use of a Furman P-2400 AR.
DESCRIPTION
True RMS Voltage Regulaon Technology
True RMS Voltage Regulaon is designed around an ultra-low noise eight-tap toroidal autoformer. A microprocessor within the P-2400
AR monitors the incoming RMS voltage with each cycle, measuring the phase angle in me with the advancing cycle. Most commer-
cial voltage regulators using mulple-tapped transformers switch taps at uncontrolled mes. This creates voltage spikes and clicks that
can leak into audio. When a voltage uctuaon requires correcon by the P-2400 AR, True RMS Voltage Regulaon advances a new tap
with less stress and in turn avoids distoron to the AC waveform. Hysteresis in the P-2400 AR circuits avoids the unnecessary switching
back and forth between the adjacent taps (or “chaer”) found in many commercial voltage regulators. If necessary, True RMS Voltage
Regulaon technology can switch taps as oen as once each cycle and do so with a shorter recovery me than a commercial voltage
regulator. In addion and unlike voltage regulators that employ ferroresonant transformers, the P-2400 AR is not sensive to small er-
rors in line frequency, making it ideal for use with generators.
The P-2400 AR has twelve outlets on the rear panel and two convenience outlets on the front panel. All are funconally interchange-
able. The outlets are regulated, surge-suppressed, and linearly ltered, making the unit a full-funcon power condioner. The auto-
former’s toroidal design assures minimal leakage of stray magnec elds.
Note: P-2400 AR is for use with AC voltage only. DC voltages should never be applied. Also, it does not change or regulate line
frequency. The output frequency will always be the same as the incoming frequency.
SMP (Series Mul-Stage Protecon) with EVS (Extreme Voltage Shutdown)
Furman’s SMP (Series Mul-Stage Protecon) surge suppression virtually eliminates service calls and costly “down me”. Tradional
surge suppression circuits sacrice themselves when exposed to mulple transient voltage spikes, requiring the dismantling of your
system, and repair of your surge suppressor. Not so with Furman’s SMP. With SMP, damaging transient voltages are safely absorbed,
clamped, and dissipated. Your connected equipment is protected, while your P-2400 AR protects itself!
Unique to Furman’s SMP is its unparalleled clamping voltage. While other designs oer clamping voltages that are well above 330
Vpk, Furman’s SMP clamps at 188 Vpk, (133 V RMS) even when tested with mulple 6000 Vpk - 3000 amp surges! This unprecedented
level of protecon is only available with Furman’s SMP technology. Addionally, Furman’s trusted EVS (Extreme Voltage Shutdown)
circuitry protects against catastrophic overvoltage condions (such as all-too-frequent accidental connecons to 208 or 240 VAC or an