Furman AR-1215 AC Line RegulatorProduct #181290 Furman 181290 LDD Power Conditioners & Surge Protectors https://www.esnapw.com/rses/ESnapServlet?MerchantNumberSent=63655
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This product has been discontinued but may be available as a Open Box item.
Protect your audio, video, computer and other electronic equipment from problems caused by AC line voltage irregularities.
AC Line Regulator
The AR-1215 is designed to provide a steady 120V AC output. It accepts any input voltage from 97V to 141V and transforms it to a constant 120V ±5V AC. Voltages beyond that range may also be converted to usable levels, depending on how far out of range they are. The AR-1215 can handle loads totaling up to 15 amps as long as the input voltage is above 124 volts. For voltages below that level, its capacity must be de-rated at approximately .15 ampere per volt. The AR-1215 circuitry monitors the incoming line voltage with each cycle, comparing it to an extremely precise voltage reference, accurate to ±0.15%. If a voltage fluctuation requires that a different tap be selected, the new tap is electronically switched exactly at the zero-crossing, to avoid distorting the AC waveform. (Most commercial voltage regulators using multiple-tapped transformers switch taps at uncontrolled times, thereby creating voltage spikes, and often creating clicks that can leak into the audio.) Hysteresis of 1.5V in the switching circuits avoids "chatter." The design is not sensitive to small errors in line frequency, making them ideal for use with generators.