Attenuator, buffer, and speaker expander for amplified speakers

PART #  304669
Available in 1 Each increments
Minimum 1 Each
Usually ships between 14 and 28 business days


The BUFEX is a continuously variable speaker attenuator that can remotely control the volume of a network of speakers. The BUFEX also provides output buffering for up to 150 self-amplified speaker inputs and allows speaker system expansion from existing 100 V, 70 V or 25 V central amplifier systems. The BUFEX includes a bypass function that can override the volume control knob setting (even if set low or off) when activated by a contact closure or open collector output. A PCB-mounted bypass trim control adjusts the volume when in bypass mode with a maximum of 12 dB of attenuation. This allows emergency announcements to be heard through all speakers in a system. The BUFEX fits into a single-gang electrical box.

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  • Volume control for a network of speakers
  • Buffer drives up to 150 speakers
  • Bypass feature allows emergency announcements to be heard even when local speaker volume is set low or off
  • Expand 100/70/25 V systems
  • Ten position settings plus off


UNSPSC Code 52161600

Spec Sheet

Spec Sheet

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