Focal 100 iwsub8 - High-power passive bass-reflex subwoofer

Focal 100 IWSUB8: A Passive In-Wall Subwoofer for Hidden Bass

The Focal 100 IWSUB8 is a passive bass-reflex subwoofer that installs inside your wall. It fits standard 16-inch on-center studs and needs only 3 3/8 inches of depth from the wall.

An 8-inch Polyglass woofer reaches down to a 30Hz low cut-off. Once installed, only a slim, paintable grille shows. It is part of Focal's 100 Series of custom-install speakers.

8-Inch Polyglass Woofer

Focal adds fine glass microbeads to the cone surface to stiffen it. The woofer covers 34 to 140Hz within 3dB, with a low cut-off of 30Hz.

Shallow Bass-Reflex Cabinet

The cabinet is 3 7/8 inches deep and sits 3 3/8 inches into the wall. A flared, moulded port inside keeps the bass free of port noise.

Paintable Magnetic Grille

The low-profile metal grille attaches magnetically and is ready to paint. Focal recommends removing it and spraying it with the same paint used on your walls.

How the 100 IWSUB8 Fits Your System

This is a passive subwoofer, so it has no built-in amplifier. Focal designed it to run from the 100 IWSUB8 Amplifier, sold separately, which can drive up to two subwoofers. With a DSP amplifier, Focal recommends a 35Hz high-pass filter and lists limiter settings in the specifications.

It will not plug into a receiver's subwoofer output on its own; it needs an amplifier. It also needs an open wall with 16-inch on-center studs and a cut-out of 13 7/8 x 51 3/16 inches. It is built for pre-construction or open-wall installs.

Who Is This Subwoofer Best For?

• Focal 100 Series systems — Focal built it to complete a 100 Series audio-video installation.
• Hidden home theaters — Only a paintable grille shows once it is in the wall.
• New builds and remodels — It mounts between 16-inch on-center studs before drywall goes up.
• Larger rooms — Two subs can share one 100 IWSUB8 Amplifier for more bass.
• Not for — Anyone wanting a plug-in powered subwoofer or a no-tools install.

How Does It Connect to Your System?

• Run speaker cable to the location first, leaving about 20 inches (50cm) of slack.
• Stick the supplied foam strips to the cabinet, then mount it between the studs with the four brackets.
• Connect the speaker cable to the terminal and check that the subwoofer works.
• Use the cut-out template to cut the wallboard, then fit the grille frame and magnetic grille.
• Connect the other end of the cable to the 100 IWSUB8 Amplifier or another suitable amplifier.

Focal recommends a professional installer because the subwoofer goes inside the wall structure. In the box: the subwoofer, 4 fixing brackets, 36 screws, a grille support frame, a metal grille, 12 foam strips, a cut-out template and a quick start guide.

Pairs Well With

Complete your in-wall system with these:

• Focal 100 IWSUB8 Amplifier
• In-wall speakers
• In-ceiling speakers
• Speaker cables

Frequently Asked Questions

Does the Focal 100 IWSUB8 need an amplifier?

Yes. It is a passive subwoofer. Focal designed it for the 100 IWSUB8 Amplifier, sold separately, which can power up to two subwoofers.

How deep is the wall cavity it needs?

It sits 3 3/8 inches (86mm) deep from the wall. The cabinet itself is 3 7/8 inches (98mm) deep.

What stud spacing does it fit?

It is designed for walls with 16-inch (40.64cm) on-center studs.

Can I paint the grille?

Yes. The grille is ready to paint. Focal recommends removing it and using a paint gun with the same type of paint as your walls.

Can I use two of them?

Yes. Up to two 100 IWSUB8 subwoofers can be connected in parallel to one 100 IWSUB8 Amplifier. Focal says two subs give more powerful bass and suit larger rooms.

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