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Professional Loudspeakers

BG-4021 Ultra-Slim Passive Speaker

Passive 4 ohm version of the BG ultra-slim platform for compact fixed installations with an external amplifier: 300 x 200 x 50 mm ABS cabinet, 60 W rated, wall-mount, black or white. Designed for projects where amplification is centralized or specified separately.

Project Notes

Type
Passive 4 ohm (external amplifier)
Rated Power
60 W
System
Audio source -> amplifier -> BG-4021 speaker
Dimensions
300 x 200 x 50 mm
Cabinet
ABS engineering plastic
Mounting
Wall-mount
Finish
Black or white
The BG-4021 brings the 50 mm ultra-slim platform to external-amplifier projects: a clean fixed installation driven by your system amplifier, matching the same cabinet and finish family as the active BG-A4021 and 100 V BG-P4021 for consistent multi-room layouts. Broad application coverage includes meeting rooms, classrooms and other small commercial environments. Rated power 60 W per the 2026 brochure; supplier confirmation is recommended for the current production version.

Other versions

Compare other Ultra Slim Speaker versions

Active, passive and 100V options can be matched to different commercial audio installation needs.

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Professional Loudspeakers

BG Ultra-Slim Series

One platform, three configurations: the BG Ultra-Slim Series pairs a 50 mm ultra-slim cabinet (300 x 200 x 50 mm) with active, passive and 100 V versions - BG-A4021, BG-4021 and BG-P4021 - for meeting rooms, classrooms, cafés, retail, gyms and hotel spaces. Black or white, ABS engineering plastic, wall-mount or stand, 60 W rated, Bluetooth 5.0 and TWS on the active model.

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Professional Loudspeakers

BG-P4021 Ultra-Slim 100V Speaker

Constant-voltage 100 V version of the BG ultra-slim platform: 300 x 200 x 50 mm ABS cabinet, 60 W rated, wall-mount, black or white. Designed for distributed commercial audio and multi-speaker installations using a 100 V amplifier. Power-tap values available on request (supplier confirmation recommended).

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Professional Loudspeakers

BG-A4021 Ultra-Slim Active Speaker

All-in-one active speaker on the BG ultra-slim platform: 50 mm cabinet, 60 W RMS / 120 W peak, Bluetooth 5.0 with TWS pairing, plus microphone, guitar, AUX and USB inputs and remote control. Built for speech, music and small-space sound reinforcement in meeting rooms, classrooms, cafés, retail, gyms and hotels. Wall-mount or stand, black or white, ABS engineering-plastic cabinet.

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