MJM Car Speaker Adapters 10" Subwoofer Spacer Rings 3/4"

These MJM Car Speaker Adapters are 3/4" thick, stackable 10" subwoofer spacers (ID 9 1/8" OD 10 7/8") designed to add depth and create a secure mounting frame for fiberglass or shallow enclosures.

If your vehicle’s factory mounting depth is too shallow for an aftermarket 10" subwoofer or you need to build a clean, professional frame inside a fiberglass enclosure, these PVC extending rings give you the extra clearance without cutting into the speaker or enclosure. Sold as a pair, SSK10XK spacers are molded to hold a 10" woofer securely while resisting moisture and vibration thanks to rigid PVC construction.

How do these spacers create the extra depth my subwoofer needs?

The spacers increase the distance between the speaker basket and the mounting surface by 3/4" per ring. They slide over the speaker opening and are fastened to the enclosure or mounting flange, effectively moving the mounting plane outward so a deeper magnet or basket clears the cavity.

• Thickness per spacer: 3/4" (19 mm)
• Inner diameter (ID): 9 1/8" to fit the speaker basket skirts
• Outer diameter (OD): 10 7/8" to match common 10" cutouts
• Sold as a pair for left and right or front and rear use

Can I stack these rings for more clearance and how stable will that be?

Yes — the SSK10XK rings are designed to be stacked; you can combine two or more to reach the depth needed for oversized magnets or added backspace. PVC’s rigidity keeps the stack stable when properly fastened, and multiple attachment screws through the spacer into the enclosure will secure the assembly.

• Stackable design for incremental depth increases
• Use multiple mounting screws for secure fastening
• Recommended for fiberglass or composite enclosures that accept glued or screwed joints

What makes the PVC construction a good choice for car audio installations?

PVC provides a lightweight yet stiff material that resists moisture, warping and vibration common in vehicle cabins. Compared with softer foams or MDF rings, these spacers retain shape over time and provide a reliable mounting surface that helps preserve speaker performance.

• Durable PVC resists humidity and temperature changes
• Rigid profile prevents compression under clamp pressure
• Smooth surface simplifies sealing or finishing in fiberglass installations

Who is this for: installers, DIY car audio enthusiasts and custom shop builders who need a precise, durable way to add depth for 10" subwoofers. If you’re fitting aftermarket speakers into shallow factory baskets, framing subs in fiberglass boxes, or just want a repeatable, stackable spacer solution, this pair of 3/4" MJM Car Speaker Adapters supplies a clean, professional option without permanent modification to the vehicle.