As a dual 18” frontloaded subwoofer, the M218T is designed specially to support the M14T or M30T. To achieve excellent sub bass reproduction while maintaining clarity and impulse performance, M218T has been designed as a bass reflex cabinet. The woofers feature a 4” interleaved sandwich voice coil with windings on the outside as well as the inside of the voice coil former. The result is a balanced coil with uniform distribution of mass and motive energy that provides an extremely linear motor assembly. In addition the motor features the use of double demodulating rings which nearly eliminates intermodulation and harmonic distortion while improving impulse and transient response. In order to achieve maximum strength and reliability, the diaphragm is reinforced with carbon fiber. The design of the basket and the double spider offer excellent heat dissipation and thereby very low power compression.