Focal IWSUB8 In-Wall Passive Subwoofer

In-wall passive subwoofer with 8" Polyglass driver


by Focal
Type: Speaker
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Experience the Power of Deep Bass with Focal IWSUB8

In the realm of home theater, the quest for a perfect audio experience can be elusive. It's a search for that sweet spot where design, technology, and performance converge to create something extraordinary. Enter the Focal IWSUB8, a subwoofer that promises to elevate your home theater experience with its superior sound quality and seamless integration into your living space.

Unobtrusive Design, Unmatched Performance

Imagine an audio experience so immersive, yet so brilliantly integrated into your home that it's almost invisible. The Focal IWSUB8 is designed for those who appreciate both form and function. It nestles neatly into your wall, maintaining the aesthetics of your room while delivering the kind of deep bass that you can feel in your bones.

  • In-Wall Installation: Fits discreetly between 16" on-center studs, maintaining the sleek look of your space.
  • Magnetic Grille: A low-profile, paintable grille blends perfectly with your wall, waiting to be customized to match your decor.
  • Shallow Depth: With an in-wall depth of just 3⅜", it's designed for pre-construction and doesn't intrude into your living area.

Tailored to Your Acoustic Preferences

The Focal IWSUB8 isn't just about powerful bass; it's about bass that's tailored to you. With its adjustable settings, you can fine-tune the bass output to match your preferences and the acoustics of your room.

  • Adjustable Low-Pass Crossover: Customize the frequency at which the subwoofer takes over, ensuring a seamless blend with your main speakers.
  • Phase Adjustment: Sync the subwoofer's output with the rest of your system for cohesive sound.
  • Volume Control: Easily adjust the subwoofer level to match your listening preference.

Engineered for Excellence

Focal is renowned for its commitment to high fidelity sound, and the IWSUB8 is no exception. It boasts a series of features that enhance its audio performance:

  • 8" Polyglass Driver: Delivers precise bass with a warm and impactful sound signature.
  • Bass-Reflex Enclosure: Engineered for optimal low-frequency response, ensuring you don't miss a beat.
  • Front Vent: Improves airflow, enhancing the efficiency and output of the bass.

The Heart of Your Home Theater

The Focal IWSUB8 is not just a subwoofer; it's the foundation of your home theater system. It pairs flawlessly with Focal's 100 Series, creating an integrated audio/video solution that brings the cinema to your home.

  • Compatibility: Designed to complement Focal 100 Series for a cohesive system.
  • Amplifier Compatibility: The 100 IWSUB8 Amplifier is the perfect match, providing the power needed for optimal performance.

Powerful Yet Controlled

The Focal IWSUB8 delivers a bass response that is both powerful and controlled, ensuring that every explosion in your favorite action movie shakes your soul, not your walls.

  • Amplifier Power: Handles up to 300 watts peak, driving the subwoofer to impressive depths without distortion.
  • Impedance & Sensitivity: Optimized to work with a wide range of amplifiers, ensuring easy integration into your existing setup.

Expand Your System

Dreaming of even more bass? The Focal IWSUB8 can power up to two subs simultaneously, allowing you to double down on the low frequencies for an even more dynamic home theater experience.

Built to Last

Quality materials and construction mean that the Focal IWSUB8 isn't just an investment in your home theater—it's an investment in years of reliable performance.

  • Durable Construction: Built to withstand the rigors of in-wall installation and the demands of dynamic sound reproduction.
  • Protection Circuits: Ensures the longevity of the subwoofer, safeguarding it against potential damage.

Installation Made Easy

Worried about the hassle of installation? Dreamedia is here to help design and install your Focal IWSUB8, ensuring it looks and sounds its best.

  • Mounting Hardware Included: Everything you need for a straightforward installation is in the box.
  • Angle-Brackets: For secure attachment to wall studs, making pre-construction installation a breeze.

Specifications at a Glance

  • Type: Passive in-wall bass-reflex subwoofer
  • Speaker Driver: 8" Polyglass driver
  • Frequency Response: 34 Hz - 200 Hz
  • Power Handling: 150 watts RMS, 300 watts peak
  • Impedance: 8 ohms
  • Sensitivity: 88 dB
  • Installation: Pre-construction wall installation using 16" OC joists
  • In-Wall Depth: 3⅜" (86mm)

The Dreamedia Difference

At Dreamedia, we understand that a home theater is more than just a collection of gadgets—it's an experience, a sanctuary, a place where memories are made. That's why we're committed to helping you design the perfect system that not only meets your needs but exceeds your expectations. The Focal IWSUB8 is a testament to our promise of delivering excellence in home theater technology.

Your Home Theater, Transformed

With the Focal IWSUB8, you're not just buying a subwoofer; you're unlocking a new dimension of audio that will transform your home theater experience. Embrace the deep, resonant bass that brings your favorite movies and music to life. Trust in the craftsmanship that ensures your investment will last. And rely on Dreamedia to guide you every step of the way.

Embrace the power of deep bass. Elevate your home theater with the Focal IWSUB8.


We're proud to be an authorized online dealer of Focal

Complete your 100 Series audio/video system with the subwoofer 100 IWSUB8. Including an 8" Polyglass speaker driver and a front vent with a streamlined inner frame to guarantee no-noise operation, this passive bass-reflex subwoofer can be installed during pre-construction of the walls using 16" OC joists. With a shallow in-wall depth (33/8"), a high-quality bass reproduction and covered with a low profile magnetic grille which can be painted, it is as high-performance as it is discreet!

In a bid to design the very best products and combinations of audio solutions for create an unique ambiance, Focal has developed a dedicated easy-install amplifier specially tailored for this subwoofer: 100 IWSUB8 Amplifier

Focal IWSUB8 In-Wall Passive Subwoofer Review


The Focal IWSUB8 is a powerful in-wall passive bass-reflex subwoofer designed to enhance the audio experience in your home theater setup. As an integral component of a complete audio system, a subwoofer is responsible for reproducing the low-frequency sounds that add depth and impact to movies, music, and games. The Focal IWSUB8 aims to deliver deep, immersive bass while maintaining a discreet installation.

Design and Installation

The in-wall design of the Focal IWSUB8 allows for a seamless integration into your home theater setup. By mounting the subwoofer within the wall, you can maintain a clean and uncluttered aesthetic without sacrificing audio performance. With a shallow depth of just 3 3/8", the IWSUB8 can be easily installed in walls without requiring significant modifications or space.

Designed for pre-construction of walls using 16" OC joists, the Focal IWSUB8 offers a convenient installation process for new constructions or renovations. However, this could pose a challenge for DIY enthusiasts looking to retrofit an existing space. It is important to consider the necessary steps and potential complications involved in the pre-construction process.

To further enhance the seamless integration, the Focal IWSUB8 features a low-profile magnetic grille that can be painted to match the surrounding wall color or décor. This allows the subwoofer to blend in effortlessly with the room's aesthetics, minimizing its visual impact.

Performance and Sound Quality

At the heart of the Focal IWSUB8 is an 8" Polyglass driver, known for its rigidity and ability to accurately reproduce low frequencies. This driver is capable of delivering powerful and impactful bass that adds depth and realism to your audio experience. With a frequency response range of 34 Hz - 200 Hz, the IWSUB8 is capable of reproducing the lowest bass notes with precision and clarity.

When it comes to power handling, the Focal IWSUB8 can handle 150 watts RMS (Root Mean Square) and up to 300 watts peak power. This ensures that the subwoofer can handle dynamic peaks in audio without distortion or damage to the driver. With an impedance of 8 ohms and a sensitivity of 88 dB, the IWSUB8 efficiently utilizes power to deliver impactful bass performance.

One of the standout features of the Focal IWSUB8 is its adjustable settings. This allows users to fine-tune the bass output to match their individual preferences and the acoustic characteristics of their room. Whether you prefer a more subtle and balanced bass or a thunderous, room-shaking experience, the IWSUB8 can accommodate your needs.

The deep bass performance of the Focal IWSUB8 adds an extra dimension to your audio experience. Whether you're watching an action-packed movie, listening to your favorite music, or playing immersive video games, the powerful and accurate bass reproduction of the IWSUB8 creates a more engaging and lifelike soundstage.

Compatibility and Versatility

To maximize the performance of the Focal IWSUB8, it is designed to be used with the dedicated 100 IWSUB8 Amplifier. This amplifier is specifically tailored to complement the subwoofer, ensuring optimal performance and seamless integration. The combination of the IWSUB8 subwoofer and the 100 IWSUB8 Amplifier creates a powerful and cohesive audio system.

In terms of compatibility, the Focal IWSUB8 is designed to work with a wide range of home theater systems. Whether you have a dedicated surround sound setup, a stereo system, or a multi-room audio system, the IWSUB8 can be easily integrated to enhance the low-frequency performance of your audio setup.

Furthermore, the Focal IWSUB8 offers versatile placement options, allowing you to achieve optimal bass distribution in your room. While in-wall installation is the primary method, the subwoofer can also be installed in other locations such as cabinets or custom enclosures, depending on the specific requirements of your space.

Durability and Build Quality

The Focal IWSUB8 is built to withstand the demands of long-term use. With durable construction and high-quality materials, this subwoofer is designed to provide reliable performance for years to come. The robust build ensures that the subwoofer can handle the rigors of delivering powerful and dynamic bass without compromising its longevity.


The Focal IWSUB8 offers several advantages that make it a compelling choice for those seeking a discreet and high-performance subwoofer for their home theater setup. Let's summarize the pros:

  1. Discreet installation with in-wall design: The in-wall design allows for a seamless integration into your space, maintaining a clean and uncluttered aesthetic.
  2. Powerful and low-frequency bass response: The 8" Polyglass driver and adjustable settings deliver deep and impactful bass, enhancing the audio experience.
  3. Adjustable settings for customized sound: The ability to fine-tune the bass output allows users to cater to their personal preferences and room characteristics.
  4. Versatile compatibility with home theater systems: The Focal IWSUB8 can be easily integrated into a wide range of audio setups, ensuring compatibility with various configurations.
  5. Sleek appearance with magnetic grille: The low-profile magnetic grille, which can be painted, ensures a seamless blend with the room's aesthetics.
  6. Enhanced audio experience with deep bass: The Focal IWSUB8 adds an extra dimension to movies, music, and games, creating a more immersive and engaging soundstage.
  7. Durable construction for long-lasting use: The high-quality materials and robust build of the IWSUB8 ensure reliable performance over an extended period.


While the Focal IWSUB8 offers many benefits, there are a couple of drawbacks worth considering:

  1. Limited information on dimensions and weight: The lack of detailed information regarding dimensions and weight can make it challenging to plan for installation or determine compatibility with specific spaces.
  2. Potential installation challenges for DIY enthusiasts: The pre-construction design may pose difficulties for those looking to retrofit an existing space, requiring careful consideration and potentially professional assistance.


The Focal IWSUB8 is a powerful and discreet in-wall subwoofer that delivers deep and impactful bass for an immersive audio experience. With its in-wall design, adjustable settings, and versatile compatibility, it offers a compelling solution for enhancing the low-frequency performance of your home theater system. The durable construction and sleek appearance further solidify its appeal. While there may be installation challenges for DIY enthusiasts and limited information on dimensions and weight, the overall performance and features of the Focal IWSUB8 make it a worthy consideration for those seeking a high-quality subwoofer for their home theater setup.


  • Technical Specifications
  • Speaker Type: Passive bass-reflex subwoofer
  • Speaker Driver: 8" Polyglass
  • Installation: Pre-construction of walls using 16" OC joists
  • In-wall Depth: 3 3/8" (86mm)
  • Nominal Impedance: 8 ohms
  • Dimensions (W x D x H): 13 7/8 x 3 7/8 x 51 3/16" (352 x 98 x 1,300mm)
  • Cut-out Dimensions (W x H): 13 7/8 x 51 3/16" (352 x 1,300mm)
  • Net Weight: 32.3lbs (14.6kg)
  • Bandwidth: 34 - 140Hz
  • Cut-off Frequency: 30Hz
  • Recommended Amp Power: Max 200W / 4 ohms
  • Sensitivity: 88 dB
  • Amplifier Specifications
  • Model: Focal 100 IWSUB8 Amplifier
  • Peak Power: 200 watts
  • Continuous Power: 150 watts under 4 ohms
  • Design: Rack-mountable
  • Protection: High-level electronic protection
  • Features
  • Front Vent: Streamlined inner frame for noise-free operation
  • Grille: Low profile magnetic, paintable
  • Amplifier Compatibility: Dedicated easy-install 100 IWSUB8 Amplifier
  • Integration: Part of the 100 Series audio/video system
  • Performance and Sound Quality
  • Frequency Response Range: 34 Hz - 200 Hz
  • Power Handling: 150 watts RMS, up to 300 watts peak power
  • Adjustable Settings: Customizable sound output
  • Design and Installation
  • In-wall Design: Seamless integration
  • Suitable for Pre-construction: Using 16" OC joists
  • Low-profile Magnetic Grille: Paintable to match wall color or décor
  • Durability and Build Quality
  • Construction: Robust for long-term reliability
  • Materials: High-quality for durable performance
  • Shipping and Return Policy
  • Free Shipping: Nationwide within the U.S.
  • Return Policy: 30 days without hassle
  • Additional Services
  • Price Assurance: Across all authorized dealers
  • Expert Assistance: For audio/visual solutions
  • Preferred Installers: Access across the U.S.