The BUFEX Buffer-Expander Volume Controller Attenuator for Self-Amplified Speakers (-1CU) by Bogen Communications is a continuously variable Attenuator, Buffer, and Speaker Expander for Self-Amplified Speakers 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.