Osborn Ultimate CF15 Subwoofer
(Combined Center Speaker/Subwoofer)

       This is the ultimate Home Theater Subwoofer, where space is a problem. It is a combination unit, combining the Ultimate Subwoofer and the C2 Center speaker. Although superb on music reproduction, the Monumental CF12 is a better choice if the intended use is primarily for music. The reason is simple. A larger driver cannot match the speed and integrity of a smaller unit. However as a Home Theater Subwoofer it is unsurpassed. The bass is stunningly deep and fast. Gunshots sound like they are in the room and the impact strikes you in the chest. Your chair shakes and shudders alarmingly as the action on the scene hots up, but the bass never rumbles with the thick, unnatural sound of other, lesser subwoofers. The ease and depth of the sound makes other subwoofers sound irritating. Although this is a large bass driver, the huge motor assembly and suburb build quality easily overcomes the disadvantage of a relatively large moving mass. This driver starts and stops instantly and has stunning bass control with truly shocking transient ability. This is the combined center subwoofer used by the designer. Nothing else quite does.

Specifications:

SPEAKER DIMENSIONS  700 X 720 X 560 mm (H-W-D) 
WEIGHT  75 Kg. 
EFFICIENCY  94 db for 1 watt at 1 meter. 
DRIVER 356 mm Polyglass. 77 mm Voice Coil, edge wound flat copper wire. Cone weight 114.3 g. Driver weight 13.5 Kg.  Resonant Frequency 23 Hz.
FREQUENCY RESPONSE  15 Hz to 125 Hz. Usable bass to 10 Hz. Variable Crossover  between 40 and 120 Hz. 
IMPEDANCE  6.5 Ohm. 
CENTER SPEAKER  Same as for C3  (click to go th C2/C3) 

Further models available in combined Center/Subwoofers:                                                          

Monumental FC13    Smaller unit using same bass driver as Monumental combined with C2 Center Speaker. 
TC15  Same as Ultimate CF15, but using T 15 Bass Driver 
TC12  Smaller unit using bass driver from T12, combined with C1 Center Speaker.