Description
M&K Sound IW150 In-Wall Speaker
The M&K Sound IW150 is a high-performance in-wall loudspeaker designed to deliver the sound quality of M&K Sound’s acclaimed professional S150 reference monitor in a discreet architectural installation. Designed for premium home theatre and serious music systems, the IW150 combines professional-grade driver technology with a virtually invisible flush-mount design.
The IW150 features two 5.25-inch polypropylene bass/midrange drivers combined with three 1-inch soft fabric dome tweeters. This driver arrangement is engineered to provide powerful, accurate and highly detailed sound reproduction across the listening area.
The three soft fabric dome tweeters provide extended and detailed high-frequency reproduction, while the dual polypropylene drivers deliver controlled and dynamic bass and midrange performance. The speaker is designed to maintain excellent imaging and clarity for both music and movie soundtracks.
The IW150 delivers a frequency response of 80 Hz–20 kHz ±3 dB and has a sensitivity of 90 dB at 2.83 V/1 m. With a 4-ohm impedance and recommended amplifier power of 25–400 watts, it can integrate with a wide range of high-performance AV amplification systems.
The speaker uses a frameless architectural design with a heavy steel baffle rather than a conventional plastic frame. The rigid steel construction helps provide a stable mounting platform while reducing unwanted vibration and resonance.
M&K Sound’s architectural mounting system is designed for fast and secure installation. The IW150 incorporates a sealed enclosure, helping control the interaction between the speaker and the wall cavity and providing more predictable acoustic performance across different installation environments.
The white metal grille is paintable, allowing the speaker to blend into the surrounding wall surface. Its frameless appearance creates a clean and discreet aesthetic that is particularly well suited to luxury residential interiors and dedicated cinema rooms.
The IW150 is voice-matched with M&K Sound satellites and subwoofers, allowing it to be integrated into complete M&K home theatre systems while maintaining consistent tonal character between channels.
With its combination of professional-monitor heritage, high power handling, accurate imaging and concealed architectural installation, the M&K Sound IW150 is an excellent choice for high-end home theatre, dedicated cinema rooms, stereo listening and custom residential AV installations.
Technical Specifications
| Specification | Details |
|---|---|
| Brand | M&K Sound / Miller & Kreisel |
| Model | IW150 |
| Product Type | In-Wall Speaker |
| System Type | 3-Way In-Wall Monitor |
| Certification | THX Ultra2 |
| Bass/Midrange Drivers | 2 × 5.25″ Polypropylene |
| High-Frequency Drivers | 3 × 1″ Soft Fabric Dome |
| Frequency Response | 80 Hz – 20 kHz ±3 dB |
| Sensitivity | 90 dB (2.83 V / 1 m) |
| Impedance | 4 Ω |
| Recommended Amplifier Power | 25 – 400 W |
| Grille Dimensions | 360 × 318 mm / 14.17 × 12.51″ |
| Baffle Dimensions | 354 × 311 mm / 13.93 × 12.24″ |
| Wall Cut-Out | 331 × 288 mm / 13.03 × 11.33″ |
| Mounting Depth | 95 mm / 3.74″ |
| Weight | 8.5 kg / 18.8 lbs |
| Grille Finish | White Metal, Paintable |
| Installation | Flush-Mount In-Wall |
Key Features
- THX Ultra2 Performance: Designed for demanding high-end home theatre applications.
- Professional Monitor Heritage: Based on the technology and design philosophy of M&K Sound’s acclaimed S150 reference monitor.
- Dual 5.25-Inch Polypropylene Drivers: Deliver controlled, dynamic bass and detailed midrange reproduction.
- Triple 1-Inch Soft Fabric Dome Tweeters: Provide smooth, extended and detailed high-frequency performance.
- 90 dB Sensitivity: Provides efficient performance with suitable high-power amplification.
- 25–400W Amplifier Compatibility: Designed for integration with powerful AV amplifiers and cinema processors.
- Heavy Steel Baffle: Provides a rigid mounting platform and helps minimise unwanted vibration.
- Sealed In-Wall Enclosure: Provides controlled acoustic performance and reduces dependence on wall-cavity conditions.
- Frameless Architectural Design: Allows the speaker to blend discreetly into the wall.
- Paintable Metal Grille: Can be customised to match the surrounding wall surface.
- Voice-Matched Design: Designed to integrate with M&K Sound satellites and subwoofers.
Ideal For
- High-End Home Theatre
- THX Home Cinema Systems
- Dedicated Cinema Rooms
- Professional-Style Residential Theatres
- Premium Stereo Systems
- Custom AV Installations
- Luxury Residential Home Theatre
- In-Wall Front Left / Centre / Right Channels
- Surround Sound Systems
- Music & Movie Listening Rooms




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