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    OEM Systems RB-12SW / RB-12SWD In-Floor Subwoofer — Installation Instructions

    September 08, 2026 2 min read

    Installation instructions for the OEM Systems Registered Bass RB-12SW (single voice coil) and RB-12SWD (dual voice coil) In-Floor Subwoofer.

    💾 Download Original PDF
    Full text manual (for reference)

    Installation instructions for the OEM Systems Registered Bass RB-12SW (single voice coil) and RB-12SWD (dual voice coil) In-Floor Subwoofer.

    Overview

    The Registered Bass 12" In-Floor Subwoofer is designed to mount in standard frame-construction floors, and with proper preparation can also be mounted in ceilings. Its space-saving design allows the enclosure to be installed from above the floor (or below the ceiling) — once the wire is run, installation is completed entirely from within the living space, not from under the floor or above the ceiling.

    Because the unit's widest dimension is only 14-1/4", it can be positioned either way between 16"-on-center joists, matching your room layout regardless of which direction the floor joists run.

    Specifications

    Spec Detail
    Power Handling 100 watts nominal, 150 watts max
    Frequency Range 25 - 100 Hz
    Sensitivity 90dB @ 1 watt / 1 meter
    Net Weight 18 lbs.
    Woofer 12" poly woofer with 2" voice coil, butyl surround, protected by a stainless steel screen, mounted with stainless steel machine screws into stainless T-nuts
    Cutout Opening Size 14-1/4" x 6-1/8" x 16-1/2" deep
    Flange (outside) 15-1/4" x 7-1/16"
    Flange (inside / diffuser opening) 6" x 14-3/16" x 1-5/16" deep

    Installation Notes

    • Use a standard 6" x 14" register vent (diffuser) to cover/trim the flange opening — no diffuser is included with the unit.
    • Choose a standard-size diffuser matching the home's other forced-air diffusers; look for tightly-constructed diffusers, and if it has adjustable louvers, make sure they can be removed (otherwise they'll resonate).
    • Foam stripping is included to place between the mounting flange and the diffuser for a positive fit.
    • For best results, use #8 x 2" oval head Phillips screws with #6 head, quantity 10.

    Manufacturer

    OEM Systems Company, Inc., 740 Freeport Blvd., #106, Sparks, NV 89431-6168 — 775-355-0405, www.oemsystems.com