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    • Home  / Product Manuals & Documentation
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    OEM Systems Kevlar Series — In-Wall & In-Ceiling Speaker Catalog

    September 08, 2026 3 min read

    Full product catalog for OEM Systems' Kevlar Series in-wall and in-ceiling loudspeakers, featuring Kevlar woofers, Phase Plug technology, and pivoting soft-dome tweeters.

    💾 Download Original PDF
    Full text manual (for reference)

    Product catalog and technical datasheet for the OEM Systems Kevlar Series loudspeakers — a line of in-wall and in-ceiling speakers built with black Kevlar woofers, pivoting textile soft-dome tweeters, and clamp-ring mounting systems.

    About Kevlar Drivers

    Kevlar was developed by DuPont research scientists Stephanie Kwolek and Herbert Blades in 1965 — a fibrous material 5 times stronger than steel of the same weight, later adopted for loudspeaker cones, protective apparel, automotive parts, and more. In these woofers, Kevlar's strength helps the cone retain its shape at very high energy levels while its low mass ensures quick, accurate response. The woven surface delivers smooth, uncolored mids, and the kapton voice coil former with butyl rubber surround are designed for years of consistent, reliable performance.

    Pivoting Textile Soft Dome Tweeters

    The textile soft dome most consistently delivers natural, uncolored high-frequency audio. Ferro Fluid lubricates and cools the voice coil, enabling high power handling. The pivoting feature allows high-frequency audio to be directed toward the main listening area, producing a seamless, transparent sound stage.

    Phase Plug Technology

    In a conventional speaker, higher frequencies emanate from the center of the cone while lower frequencies are produced further out — larger cones are generally capable of more bass. Due to the cone's shape, higher-frequency sound waves tend to collide at a focal point, causing phase distortion and efficiency loss. The phase plug pole piece extension improves driver performance and clarity by deflecting mid-range audio outward, minimizing distortion-producing collisions.

    Model Lineup & Specifications

    Model Description Key Specs
    SE-694 KE 5¼" long-throw in-wall, Phase Plug pole piece, 1" tweeter, 12dB/octave crossover, poly-switch overdrive protection 91dB sensitivity, 50Hz–20kHz, 40W nom/80W max, 8Ω, cut-out 5 9/16"W x 8¼"H x 2⅜"D
    SC-520 KE 5¼" in-ceiling, ¾" pivoting soft-dome tweeter, 12dB/octave crossover 91dB sensitivity, 50Hz–20kHz, 30W nom/60W max, 8Ω, cut-out 6½" round x 2⅜" deep
    SE-790 KE 6½" long-throw in-wall, Phase Plug pole piece, 1" tweeter, poly-switch protection 91dB sensitivity, 45Hz–20kHz, 50W nom/100W max, 8Ω, cut-out 7 3/8"W x 10 7/8"H x 3 1/8"D
    SC-620 KE 6½" in-ceiling, ¾" pivoting soft-dome tweeter 91dB sensitivity, 45Hz–20kHz, 40W nom/80W max, 8Ω, cut-out 7 3/8" round x 2 7/8" deep
    SE-892 KE 8" long-throw in-wall, Phase Plug pole piece, 1" tweeter, IR knock-out 91dB sensitivity, 35Hz–20kHz, 60W nom/120W max, 8Ω, cut-out 9"W x 13"H x 3¼"D
    SC-820 KE 8" in-ceiling, 1" pivoting soft-dome tweeter 91dB sensitivity, 35Hz–20kHz, 50W nom/100W max, 8Ω, cut-out 8 5/8" round x 3 3/8" deep
    SE-893 KE 8" long-throw in-wall with 1½" midrange dome, IR knock-out 91dB sensitivity, 35Hz–20kHz, 60W nom/120W max, 8Ω, cut-out 9"W x 13"H x 3¼"D
    SC-622 K 6" single-point stereo in-ceiling, dual (L+R) ¾" dome tweeters 91dB sensitivity, 45Hz–20kHz, 40W nom/80W max, 8Ω, cut-out 7 3/8" round x 2 7/8" deep
    SC-822 K 8" single-point stereo in-ceiling, dual (L+R) ¾" dome tweeters 91dB sensitivity, 35Hz–20kHz, 50W nom/100W max, 8Ω, cut-out 8 5/8" round x 3½" deep
    SE-LCR KE Dual 5¼" long-throw magnetically-shielded LCR speaker, for 5.1/6.1/7.1 home theater; orient vertically or horizontally 91dB sensitivity, 45Hz–20kHz, 50W nom/100W max, 8Ω; sheetrock cut-out 7 7/8" x 14 7/16" x 3½"D (horizontal mount requires min. 13 15/16" between studs)

    Construction Features

    • Clamp-Ring Mounting — Rectangular in-wall models use a clamp-ring mounting system that distributes clamping force over a larger surface area, reducing pressure on sheetrock while increasing mounting strength. The mounting ring comes pre-assembled to the speaker frame, reducing installation time.
    • IR Receiver Knockouts — 6½" and 8" rectangular in-wall speakers feature a mounting provision for a remote control signal receiver behind the grille, allowing discrete integration with an infrared receiver/repeater system that works with standard IR remotes to control your system from any equipped room.

    Warranty

    Backed by a Lifetime Limited Warranty. All products are manufactured in OEM Systems Company's ISO 9002-registered facility in Sparks, Nevada.