MONOLITH M-15 V2 Active Subwoofer THX 1000W Black

The THX® certified Monolith M-15 V2 subwoofer delivers deep bass with low distortion. Dropping below 16Hz, the Monolith M-15 V2 unleashes significant volume with the ability to convey and articulate the subtle nuances of your music or movies.

The subwoofer in detail

Body and internal reinforcements : The use of HDF (High Density Fiberboard) instead of MDF results in a sonically inert cabinet. The internal bracing was intelligently placed to increase the overall strength of the cabinet and limit unwanted panel vibration, which could cause sound discoloration and distortion. The strength of the cabinet and the bracing combine to ensure massive bass, not resonance.

Vents and grids : The Monolith M-15 V2 uses three 88.5mm vents with internal and external flares. These multiple ports are used to ensure high sound pressure at low frequencies (fb=21Hz). The double flares are used to reduce asymmetric distortion. The vents can also be plugged with the supplied plugs. The "floating" grille is made from rigid MDF and is offset from the cabinet to maximize airflow from the woofer and vents.

15" Woofer

Every part of the driver has been developed to deliver high output, low distortion and accurate bass. Its unique diaphragm combines paper and fiberglass, taking advantage of the benefits of each material for high durability and impressive linear excursion capability. The result is a diaphragm capable of achieving optimal movement at any frequency it can be asked to produce.

1. Lower suspension : Finite Element Analysis (FEA) modeling and Klippel laser-based optimizations were used to design a diaphragm capable of impressive linear excursion. The lower and upper suspensions are designed in conjunction with the engine structure. The lower suspension is essential to maintain very low distortion levels at high excursions, which is essential to achieve high SPLs at low frequencies.

2. Spider and air vents : The spider is made from several layers of NOMEX® and installed by hand, ensuring low mass but high strength and durability. The advantages of the air vents are twofold: on the one hand, they allow air flow to effectively cool the voice coil, and on the other hand, they reduce asymmetrical compliance due to air compression under the diaphragm and the spider, which would manifest itself in unwanted distortions.

3. Membrane suspension : Again, FEA modeling and Klippel optimization are used to create the large membrane suspension. This suspension is made from a unique formulation of NBR (Nitrile Butadiene Rubber). This material was developed after months of prototyping to ensure the highest levels of excursion without sacrificing linearity or distortion.

4. Motor structure : The motor is made of CNC machined low carbon steel in an assembly to concentrate the magnetic flux. Rings are used to cancel eddy currents to further stabilize the magnetic flux and greatly reduce distortion. Precision winding, made of aluminum (which has lower thermal compression than copper) allows the coil to remain cool. The design of the motor and suspension is extremely important to ensure perfect control of the speaker's movement over a very wide range of input signals, for a high output level and minimal distortion.