PSB CSIW SUB10 10" In-Wall Passive Subwoofer at Vinyl Sound Toronto Canada

The CSIW SUB10 is a 10-inch passive in-wall subwoofer from PSB Speakers (Pickering, Ontario, Canada), available at Vinyl Sound in Toronto, Canada. Part of PSB's CustomSound CI line, the CSIW SUB10 was engineered specifically for new construction custom installation projects where a hidden, high-performance bass solution is required. Its sealed MDF cabinet isolates completely from the drywall, while a stud-beam coupling structure and rubber-isolated mounting brackets eliminate cabinet resonances for tight, accurate bass. The driver features a Glass fiber / PMI foam sandwich cone with dual rubber surround and a balanced drive motor structure, delivering a frequency response of 25 Hz to 150 Hz (±3 dB) at 8 ohms nominal impedance. Designed and finally voiced by PSB founder Paul Barton at Canada's National Research Council (NRC) in Ottawa, the CSIW SUB10 is ideally paired with the PSB CS 500W subwoofer amplifier.

Stud-Beam Coupling and Drywall Isolation System

The CSIW SUB10's most distinctive engineering feature is its two-stage structural design. The sealed MDF cabinet is decoupled from the drywall surface using rubber-isolated mounting brackets, which prevent bass energy from exciting the drywall and generating the coloured resonances and rattles that affect conventional in-wall subwoofer designs. At the same time, the cabinet couples rigidly to the structural stud beams of the wall, using the building's frame as a stable, non-resonant mounting platform. This combination allows the CSIW SUB10 to create a controlled acoustic environment inside the wall cavity, channelling driver energy into the room rather than into the surrounding structure. The design also minimises the protrusion of the grille from the drywall surface, giving the installed subwoofer an exceptionally flush, discreet appearance that integrates with the wall rather than projecting from it.

High-Excursion Shallow Driver and Paul Barton NRC Voicing

The CSIW SUB10 uses a purpose-built high-excursion shallow driver designed to fit within the depth constraints of a standard stud-bay wall cavity while still delivering the long cone travel needed for deep, impactful bass. The driver features a Glass fiber and PMI foam sandwich cone construction that combines high stiffness with low mass, enabling accurate pistonic motion across the full operating range without the breakup modes associated with heavier cone materials. A dual rubber surround provides controlled compliance at high excursion, while the balanced drive motor structure and die-cast basket ensure precise, distortion-free operation under load. Final voicing was performed by Paul Barton at Canada's National Research Council (NRC) in Ottawa, the same world-class acoustic research facility where PSB has refined its speaker designs for over 50 years.

Key Features

• 10-Inch Passive In-Wall Subwoofer: A high-excursion shallow driver with a Glass fiber / PMI foam sandwich cone and dual rubber surround delivers precise, room-filling bass from within the wall cavity.
• Stud-Beam Cabinet Coupling: The sealed cabinet connects rigidly to structural stud beams, using the building's frame as a stable, non-resonant mounting platform for clean, accurate bass reproduction.
• Drywall Isolation via Rubber-Isolated Mounting Brackets: Rubber-isolated brackets decouple the cabinet from the drywall surface, eliminating unwanted resonances and wall rattle for tighter, more controlled bass.
• Sealed MDF Cabinet: A sealed cabinet design prevents port noise and resonances, delivering smooth, accurate bass response consistent with PSB's audiophile engineering standards.
• Frequency Response 25 Hz to 150 Hz (±3 dB): Covers the full subwoofer operating range with deep bass extension for both home theatre and music applications.
• 8 Ohm Nominal Impedance: Standard impedance for straightforward pairing with the PSB CS 500W subwoofer amplifier or compatible third-party subwoofer amplifiers.
• Sensitivity 88 dB (Anechoic) / 90 dB (Listening Room): High driver efficiency reduces the amplifier power required for adequate output levels in residential installations.
• Dual Mounting Options: Two mounting configurations accommodate different wall construction types and installation scenarios for maximum flexibility across custom installation projects.
• Minimal Grille Protrusion: The installation design minimises how far the grille extends beyond the drywall surface, creating an exceptionally flush and discreet finished appearance.
• Round and Square Grilles Included: Magnetic, small-perforation metal grilles in both round and square profiles are supplied, allowing the installer to match the grille shape to the room's design aesthetic.
• CS 500W Amplifier Compatible: The PSB CS 500W subwoofer amplifier is custom-configured for the CSIW SUB10 and can drive up to two CSIW SUB10 subwoofers simultaneously for dual-sub custom installations.
• Paul Barton NRC Voicing: Designed and finally voiced by PSB founder Paul Barton at Canada's National Research Council in Ottawa, ensuring the same natural, accurate bass character found across PSB's full loudspeaker range.
• New Construction CI Application: Engineered specifically for professional custom integration installers working on new construction residential and commercial projects.

Technical Specifications

Installation at a Glance

• Passive in-wall design: requires external subwoofer amplifier
• Recommended pairing: PSB CS 500W subwoofer amplifier (one CS 500W drives up to two CSIW SUB10 units)
• Sealed MDF cabinet couples directly to structural stud beams
• Rubber-isolated mounting brackets decouple cabinet from drywall surface
• Dual mounting configuration options for different wall construction types
• Accommodates various wall thicknesses via adjustable grille fitting
• Round and square magnetic metal grilles included for aesthetic flexibility
• Designed for new construction custom installation (CI) applications

Frequently Asked Questions

What is the PSB CSIW SUB10?

The PSB CSIW SUB10 is a 10-inch passive in-wall subwoofer from PSB Speakers, designed for new construction custom installation projects in Pickering, Ontario, Canada. It features a Glass fiber / PMI foam sandwich cone driver with dual rubber surround, a sealed MDF cabinet, and a stud-beam coupling and drywall isolation system engineered to eliminate wall resonances. The CSIW SUB10 delivers a frequency response of 25 Hz to 150 Hz (±3 dB) at 8 ohms and requires an external subwoofer amplifier, with the PSB CS 500W being the recommended pairing.

How does the PSB CSIW SUB10 compare to the Sonance Sub 8 Round and Polk Audio 255C-RT in-wall subwoofers?

The PSB CSIW SUB10, Sonance Sub 8 Round, and Polk Audio 255C-RT are all passive in-wall subwoofers designed for custom installation. The Polk 255C-RT uses a single 8-inch driver and is designed for both new and retrofit construction, while the CSIW SUB10 uses a larger 10-inch shallow-excursion driver exclusively optimised for new construction stud-bay installation. The Sonance Sub 8 Round is a round-only form factor targeting retrofit and flush applications. The CSIW SUB10 differentiates through its dual-stage structural design — stud-beam coupling combined with rubber-isolated drywall decoupling — which addresses resonance control at the structural level rather than relying on cabinet isolation alone. Paul Barton NRC voicing and a sealed cabinet further distinguish it for installers who prioritise musical accuracy alongside home theatre performance.

Does the PSB CSIW SUB10 include a built-in amplifier?

No, the CSIW SUB10 is a passive subwoofer and requires an external amplifier. PSB has developed the CS 500W subwoofer amplifier specifically as a companion for the CSIW SUB10, pre-configured to deliver the optimal power profile and frequency tuning for this driver and cabinet combination. One CS 500W unit can drive up to two CSIW SUB10 subwoofers simultaneously, making it straightforward to specify a dual-subwoofer installation in larger rooms or home theatre spaces without additional amplifier hardware.

Why is the CSIW SUB10 designed for new construction only?

The CSIW SUB10's stud-beam coupling system requires direct access to the wall's structural framing during installation, which is only practical in new construction or during major renovation where the wall cavity is accessible before drywall is applied. This mounting method is central to the product's acoustic performance: by coupling the sealed cabinet rigidly to the studs and isolating it from the finished drywall surface using rubber brackets, PSB eliminates the resonance pathways that affect retrofit in-wall subwoofers where the cabinet must bear against the finished wall surface. The result is a fundamentally quieter, more controlled bass reproduction that justifies the new construction requirement.

What cone material does the CSIW SUB10 use and why does it matter?

The CSIW SUB10 uses a Glass fiber and PMI (polymethacrylimide) foam sandwich cone, a composite structure that combines high bending stiffness with very low mass. The glass fiber skins provide the structural rigidity needed to move large volumes of air at low frequencies without cone flex, while the PMI foam core keeps the total cone mass low enough for fast, accurate transient response. This combination is particularly well suited to a high-excursion shallow driver, where maintaining pistonic motion over a long throw in a compact axial depth is more mechanically demanding than in a conventional deep-basket driver.

Can two PSB CSIW SUB10 subwoofers be used in the same installation?

Yes, and PSB specifically supports this configuration. The CS 500W subwoofer amplifier is designed to drive two CSIW SUB10 units simultaneously from a single amplifier chassis, making dual-subwoofer installation straightforward from both a specification and wiring standpoint. Using two subwoofers in a room distributes bass energy more evenly across the listening area, reducing seat-to-seat variation in bass level and smoothing the frequency response at the primary listening position, a well-established advantage in professional home theatre and high-performance audio installations.

Where can I buy the PSB CSIW SUB10 in Toronto or Canada?

The PSB CSIW SUB10 10" In-Wall Passive Subwoofer is available in Toronto, Canada at Vinyl Sound, an authorised PSB Speakers dealer. Vinyl Sound supports professional custom installation projects and can assist with specification, system design, and pairing with the PSB CS 500W subwoofer amplifier. Installers and homeowners across Canada are welcome to contact Vinyl Sound for purchasing, project consultation, and shipping inquiries.