The D2 Dual Driver

Central to this innovative solution are two key developments. First: the use of an annular diaphragm, not subject to the break-up modes of a conventional dome diaphragm. Second: the merging of two drivers into a single, compact transducer with a single acoustical output. Instead of the large and heavy metal dome diaphragm of a conventional compression driver, the D2430K uses two annular low-mass polymer diaphragms offering the same radiating area as a conventional 3-inch dome. Two separate 3-inch voice coils driven by their own magnet structures share the burden of heat transfer, resulting in a dramatic increase of output and power handling.

The 2216Nd Differential Drive Transducer

No "off-the-shelf" woofer, the 2216Nd employs no less than five patented technologies. Echoing the "dual driver" design of the D2, the 2216Nd utilizes dual neodymium magnets and voice coils. To ensure the ultimate performance, even the use of special wire in the 2216 voice coils is a JBL-patented application. In addition, the 2216Nd's cone, compliance and spider are engineered to allow greater excursion at the woofer's lowest frequencies.

Image Control Waveguide

To support an imperceptible transition between drivers, and deliver exceptional imaging, JBL engineers pioneered a new patent-pending waveguide design that enables neutral frequency response, both on- and off-axis in the vertical and horizontal planes, all the way down to the M2's 800 Hz crossover point. The unique geometry of this waveguide allows the M2 to deliver remarkable high-frequency detail, imaging, and natural balance at nearly any listening position.

The M2 Enclosure

Extended low-frequency performance and high SPL can be the formula for unwanted resonance. The M2 enclosure is constructed of rigid 1" MDF, extensively braced for rock-solid stability at the system's full-rated power. The enclosure incorporates a JBL-patented Slipstream port design with internal flares that ensure low-frequency efficiency while eliminating noise caused by port turbulence.

LSR Design Protocol

With an awareness that today's audio production is carried out in a wide range of acoustic environments, JBL engineers employ a set of measurements to predict how a loudspeaker will behave in actual room environments. While other manufacturers use a single on-axis frequency response measurement taken at one point in space, LSR Design Protocol requires 72 measurements that encompass all power radiated into the listening room, in every direction, reflecting 1,296 times the information of a single on-axis response curve.

Complete System Integration

Your M2 system is completed by Crown I-Tech power amplifiers with built-in DSP specifically designed for the M2, as well as Harman System Architect software and BSS Soundweb London signal processors. All these elements work together to scale from single to multiple M2 systems and add capability for your expanding studio, from project room to a post-production control room with an all-digital signal path.