Setting Up the KSK92 Subwoofer Stacking Kit

By Official KEF US Website | HiFi Speakers, Subwoofers | Published: 2026-10-21

Category: How-to Guides

Learn how to safely stack two KEF subwoofers using the KSK92 Stacking Kit for tighter, more powerful bass. Step-by-step instructions and common pitfalls.

Quick answer

The KSK92 Subwoofer Stacking Kit lets you safely and securely stack two compatible KEF subwoofers, improving bass consistency and reducing floor space. Follow the steps below for a stable, vibration-free setup.

Why stack subwoofers?

Stacking two subwoofers vertically can reduce cancellation between drivers and deliver more even bass across a room. It also saves floor space compared to placing them side by side. The KSK92 kit is designed specifically for KEF subwoofers, ensuring a secure fit and proper weight distribution.

What you need before starting

You will need two compatible KEF subwoofers (such as the KC92 or KF92), the KSK92 kit, and a Phillips-head screwdriver. The kit includes metal brackets, isolation pads, and all necessary hardware. Make sure both subwoofers are unplugged and placed on a flat, stable surface.

Step-by-step stacking guide

1. Prepare the bottom subwoofer: Place the bottom subwoofer on a level surface. Attach the four metal brackets to the top of the subwoofer using the supplied screws. Tighten firmly but do not overtighten. Common mistake: Forgetting to align the brackets symmetrically, which can cause the top subwoofer to sit unevenly.
2. Add isolation pads: Peel and stick the included isolation pads onto the top surface of the brackets. These pads dampen vibrations and prevent scratches. Checkpoint: Ensure pads are centered on each bracket to maximize contact area.
3. Position the top subwoofer: Carefully lift the second subwoofer and lower it onto the brackets so that its feet sit inside the bracket grooves. Gently rock it to confirm it is fully seated. Common mistake: Dropping the top subwoofer onto the brackets can damage the drivers or the kit. Lower it slowly and steadily.
4. Secure the top subwoofer: Use the remaining screws to fasten the top subwoofer to the brackets from above. Tighten each screw a little at a time in a cross pattern to ensure even pressure. Checkpoint: After tightening, check that the top subwoofer does not wobble. If it does, recheck bracket alignment.
5. Connect and test: Reconnect the power and signal cables to both subwoofers. Power on and play bass-heavy content at moderate volume. Listen for rattles or buzzes that indicate loose hardware. Common mistake: Using mismatched phase or crossover settings on the two subwoofers. Set both to the same phase and crossover frequency for coherent output.

Product details

KSK92 Subwoofer Stacking Kit: The KEF KSK92 Subwoofer Stacking Kit is a subwoofer accessory designed for stacking compatible KEF subwoofers. It provides a dedicated, secure stacking solution that prevents slipping and reduces vibration transfer between the two subwoofers.
KSK92 Subwoofer Stacking Kit