Dynamo IW-O

The MartinLogan Dynamo IW-O is a high-performance passive in-wall subwoofer designed to deliver deep, powerful bass while remaining completely hidden behind the wall. Unlike the Dynamo IW-S, the IW-O features an open-back design that utilizes the wall cavity as its enclosure, allowing for greater bass extension and higher output potential. For installations requiring improved acoustic isolation and even greater performance, an optional High Output Back Box is available.

Equipped with dual 8-inch carbon-fiber-reinforced polypropylene woofers, the Dynamo IW-O provides more radiating surface area than a typical 10-inch subwoofer while maintaining a slim, retrofit-friendly form factor. Its rigid steel chassis, GRIP™ mounting system, and premium crossover components ensure excellent structural integrity, low distortion, and accurate low-frequency reproduction for both music and home theater applications.

The Dynamo IW-O integrates seamlessly with MartinLogan's MDA Series amplifiers and the MP500 amplifier, enabling advanced DSP tuning, bass management, and ARC Genesis room correction for optimized performance. Whether installed individually or in multiple-subwoofer configurations, it provides installers with exceptional flexibility while maintaining a clean, virtually invisible appearance thanks to its paintable magnetic grille.

Ideal for custom home theaters, distributed audio systems, and luxury residential installations, the Dynamo IW-O offers an outstanding combination of high output, deep bass extension, and discreet architectural integration. It is an excellent solution for listeners seeking the performance of a traditional subwoofer without sacrificing valuable floor space or room aesthetics.