The Apollo XP95 Ancillary Base Sounder is a local-area sounder designed for indoor use with XP95, Discovery or Soteria detectors and control panels using the appropriate software.

The sounder incorporates a base into which an XP95, Discovery or Soteria detector can be fitted. Power is provided by the control panel via the loop wiring to which it is connected.

With a guaranteed sound output of 85 dB(A) at one metre the device has a current consumption of 3 mA. This means that a very low current noise is generated on the loop and means that up to 126 sounders can be connected to the loop.

Tone frequency and volume control

The sounder produces an uninterrupted alternating tone of 990 Hz for 0.5 seconds and 630 Hz for 0.5 seconds. Volume is adjustable steplessly from 70 dB(A) to 85 dB(A). However, the sounder does not have a synchronisation feature or pulsed tone.

The sounder responds to signals from the associated detector or beacon and does not have an address of its own.