BUFEX Bogen Buffer-Expander Volume Control

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 of existing 100V, 70V, or 25V central amplifier systems. The BUFEX includes a bypass function that can override the volume control knob setting when activated by a contact closure or open collector output. This allows emergency announcements to be heard through all speakers in a system even if the volume control knob setting is set low or off. A PCB-mounted bypass trim control adjusts the volume when in bypass mode with a maximum of 12 dB of attenuation. The BUFEX fits into a single gang electrical box.

Specifications

• Supply Voltage - 24V DC
• Current Consumption - 1 CU (50 mA)
• Output Impedance - 8 ohms
• Volume Control Range - 0 to -50 dB
• Bypass Voltage - 10V
• Bypass Trip Current - 0.8 mA
• Speaker Drive Capacity - 150 Self-Amplified Speakers
• Input Compatibility - 100V, 70V, and 25V
• Dimensions - 2-7/8" W x 4-5/8" H x 2-1/2" D
• Product Weight - 3 oz.

BUFEX Specifications PDF

BUFEX Manual