The 10MB400 midbass transducer is derived from the 10MB600 but uses a 50 mm voice coil. Nevertheless, it has outstanding sensitivity (100.5dB 1W/1m) as well as good power handling.<br /> This transducer is an extremely versatile high quality 10" driver. It can be used as the midbass component in a 2-way system in combination with a 1" HF compression driver, or as the dedicated bass driver in compact reflex enclosures of just 15 - 25 lt volume, or as a direct radiating midrange unit.<br /> The curvilinear paper cone is carried by a dampened linen, double half-roll front suspension to control vibrational modes whilst providing good excursion capabilities.<br /> The copper shorting ring on the pole piece reduces inductance and provides improved transient response and phase control on the mid frequencies.<br /> The 50 mm diameter state-of-the-art, copper wire voice coil employs the same technology fitted to our top-of-the-range models, i.e. our Interleaved Sandwich Voice coil (ISV). This technology consists of a high strength fiberglas former carrying windings on both the outer and inner surfaces, creating a mass balanced coil. This results in an<br /> extremely linear motor assembly which, in conjunction with the highly advanced design of the magnetic structure, provides a high force factor or BL.<br /> <p>Another advanced design feature of the 10MB400 is the air channel fine passages between the chassis back plate and top plate of the magnet. These passages are used to draw heated air out from the voice coil gap and dissipate the energy via the chassis casting.<br /> The top and back plates of the magnet assembly have been designed to optimise flux density and BL factor in the air gap using our in-house FEA CAD facility.</p>