AT-303AP Attenuator


The AT-303AP is a flush-mounted wall attenuator and uses a transformer which allows connection of a wide range of loads (under 30W). Volume can be adjusted in five steps. The AT-303AP features push-in terminals, each of which accepts two conductors for easy bridging.

TOA Canada Corporation will now be including Imperial Screws with every 70 Volt Stepped Wall Attenuator.


Input Range 0.5 - 30 W
Attenuation 5 steps (0 dB, -6 dB, -12 dB, -18 dB, OFF)
Applicable Cable 600 V vinyl-insulated cable (Indoor Vinyl or Heat-resistant Indoor Vinyl cable)
Solid cable: φ0.8 (0.03" - φ1.6 (0.06) mm
Terminal Push-in connector
Finish Knob, panel, plate: ABS resin, ivory (RAL 1013 equivalent)
Case: ABS resin, black
Dimensions 70 (W) × 120 (H) × 52.4 (D) mm (2.76" x 4.72" x 2.06")  (with plate)
41 (W) × 108 (H) × 52.4 (D) mm (1.61" x 4.25" x 2.06")  (attenuator only)
Weight 210 g (0.46 lbs) (unit only)
Accessory Plate x 1, Plate mounting screw x 2, Box mounting screw x 2

(Note: Connection for emergency paging attenuator override)