PMC ci140sub On-Wall Subwoofer (Each)
$8,000.00
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The PMC ci140sub is a high-performance, passive architectural subwoofer designed to provide the foundational low-frequency support required by elite home cinemas and professional immersive audio studios. As the dedicated low-frequency partner to the flagship ci140 monitor, this subwoofer is engineered to deliver the same speed, depth, and transparency that has made PMC the reference standard in the world’s leading mastering facilities. In 2026, the ci140sub remains the premier choice for designers who require subterranean bass performance without the intrusive footprint of traditional, bulky floor-standing subwoofers.
The Power of the Advanced Transmission Line
The ci140sub distinguishes itself from standard “box” subwoofers through the implementation of PMC’s proprietary Advanced Transmission Line (ATL™) technology. While most in-wall subwoofers use sealed or simple ported designs that can suffer from “one-note” bass or port chuffing, the ci140sub features a massive 2.3-meter (7.5ft) internal labyrinth. This labyrinth acts as an acoustic filter, absorbing unwanted high frequencies and reinforcing only the lowest octaves.
This sophisticated loading allows the ci140sub to produce a linear, low-distortion response down to 32Hz. Because the ATL design maintains air pressure within the cabinet, the drivers remain under perfect control even at extreme excursions. This results in bass that is not only deep but remarkably agile, capable of following complex bass lines or explosive cinematic transients with unerring precision.
Quad-Driver Dynamics and Laminair™ Technology
To achieve high-SPL output from a shallow cabinet, the ci140sub utilizes a quad-driver array. It features four 5.25-inch (133mm) Natural Fibre LT™ long-throw drivers. This configuration provides a massive collective surface area—equivalent to a much larger single woofer—while maintaining the lightning-fast transient response of smaller cones.
To ensure this power is delivered cleanly, the ci140sub incorporates Laminair™ aerodynamic venting. This technology, a staple of 2026 PMC engineering, smooths the airflow at the exit of the transmission line. By reducing turbulence, Laminair™ eliminates port noise and ensures that the low-frequency output remains defined and punchy, even when the system is pushed to its peak output of 115dB.
Seamless Installation and Discretion
Despite its commanding 1.4-meter (55-inch) height, the ci140sub is remarkably easy to integrate into a modern room. With a mounting depth of just 103mm (4 inches), it fits into standard wall cavities using the patented Qikfire™ spring-loaded mounting system. This allows for a secure, vibration-free installation in seconds.
The subwoofer is finished in a professional matte “Studio Black” and is hidden behind a bezel-less, micro-perforated magnetic grille. This white grille is fully paintable, allowing the ci140sub to vanish into the architecture. For rooms where in-wall mounting is not an option, the On-Wall Kit (OWK) allows for a sleek, shallow-profile installation that complements large-format displays. Whether reinforcing a stereo pair or serving as the LFE backbone of a 9.1.6 Dolby Atmos® array, the ci140sub delivers uncompromising performance in a discreet, elegant package.
Features & Specifications
| Attribute | Detail |
|---|---|
| Type | Passive in-wall or on-wall subwoofer |
| Frequency Response | 32Hz – 150Hz |
| Sensitivity | 93dB SPL (2.83V @ 1m) |
| Peak SPL | 115dB SPL |
| Nominal Impedance | 4 Ohm |
| Recommended Amp Power | 100 – 600 W |
| Effective ATL™ Length | 2.3m (7.5ft) |
| Input Connectors | 1 pair 4mm sockets (binding posts) |
Drive Units
- Low Frequency (LF): 4 x 133mm (5.25”) Natural Fibre LT™ long-throw drivers
Physical Attributes & Installation
| Attribute | Detail |
|---|---|
| Dimensions (H x W x D) | 1400mm (55.1″) H x 300mm (11.8″) W x 103mm (4″) D |
| Weight | 25kg (55lbs) unboxed with grille |
| Standard Finish | ci series black cabinet with white or black paintable magnetic grille |
| Mounting Depth | 103mm (4″) |
| Mounting Systems | Qikfire™ spring-loaded in-wall system; supplied interlocking on-wall bracket |
| Optional Accessories | OWK (On-Wall Kit in black or white), PMK (Pre-Mount Kit) |
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