Manufacturer Part Number: SAG5500HEModel SAG550HE Twelve Zone Dual Source Stereo Speaker Selector is a highly efficient dual-source, impedance-matching selector designed for use with either 4-ohm or 8-ohm amplifiers and 4-ohm to 8-ohm speakers. It is equipped with a low-frequency protection circuit to reduce subsonic signals, which allows high power operation without amplifier shutdown. The SAG5500HE employs audiophile-grade impedance matching autoformers to maintain a safe operating load at the amplifier while distributing maximum power through the system. Autoformers are very efficient because of the small loss incurred as a result of heat dissipation. This unit features a back panel rotary switch, which is used to set the appropriate impedance based on the number of pairs of speakers connected. This switch selects the proper taps of the autoformers, allowing all of the amplifier's power to be delivered to the speakers. The SAG5500HE can be connected to one or two amplifiers. A front panel button allows switching between the two amplifiers for all speakers connected to the unit.
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