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KSI 811-WMBB-HP, 811-WMBB-HP-FR Series 4Fire retardant button

811 WMBB HP specs

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BackBox Wall & Ceiling Mount Loudspeaker with White Fabric Grille

List Price – 811-WMBB-HP: $722.00 each, 811-WMBB-HP-FR: $.00 each

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The KSI Series IV 811-WMBB-HP is the wall mount companion to our 8081-CS- HP. It is designed for clean mounting in drywall and other flat substrates. It’s a perfect choice for corporate, government, retail and any installation demanding superb sound quality with pleasing architectural appearance.


The 811-WMBB-HP offers smooth midrange performance with powerful bass response through the use of our cast frame 8” bass mid transducer and 10” optimally tuned passive radiator. Our 8” transducer features a lightweight mica filled cone providing exceptional voice and music intelligibility. High frequencies are handled by our 25mm horn loaded dome tweeter, providing very smooth upper octave response for an “open” sound quality with wide dynamic range. We have improved our proprietary filter network using very high tolerance components which are inaudible at the crossover frequency. This provides outstanding clarity and coherence with very wide frequency response and high power capacity. This careful attention to detail has led to a loudspeaker with outstanding clarity and coherence along with very wide frequency response and high power capacity. The backbox is designed to mount into a 2×6 wall cavity on 16” centers prior to the drywall installation. The drywall installer simply trims out the backbox opening as with any light fixture or outlet. After painting and finishing the drywall, the 811-WMBB-HP baffle is reinstalled into the opening to complete the job.


All KSI ceiling and wall mount loudspeakers may be used in combination with the 811-WMBB-HP, providing unlimited solutions for your audio environment. The 811-WMBB-HP is available with its backbox fabricated from Duraflake fire rated particle board by ordering part number 811-WMBB-HP-FR.