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The AT-Series of attenuators allows the output level of a network of 25V or 70V speakers to be controlled from a wall-mounted volume control, without affecting overall amplifier volume settings. The AT10A can handle speaker loads of up to 10W and the AT35A can handle speaker loads of up to 35W. Volume reduction takes place in 3 dB increments except for the two lowest settings, which provide 6 dB reduction increments. These rugged attenuators have 10 levels of sound control, plus an off setting.