Reasons to choose Definitive Technology IW Sub Reference over Bowers & Wilkins Performance Series CWM663
Max Input Power 275 watts vs 150 watts
Woofer Size 13 inches vs 6 inches
Low Frequency Response 14 Hz vs 45 Hz
High Frequency Response 200k Hz vs 50k Hz
Passive Radiator 1 x 13-inch vs None

Reasons to choose Bowers & Wilkins Performance Series CWM663 over Definitive Technology IW Sub Reference

Driver Setup 2-way vs 1-way
Nominal Impedance 8 ohms vs 4 ohms
Height 280mm vs 639mm
Base Surface Area 177cm2 vs 373cm2
Price per pair* 900USD vs 1499USD
Definitive IW Sub Reference vs B&W CWM663 Specs Table
General Definitive Technology IW Sub Reference Bowers & Wilkins Performance Series CWM663
Brand Definitive Technology Bowers Wilkins
Speaker Type Passive In-wall Speaker Passive In-wall Speaker
Power Range up to 275 watts 25-150 watts
Sensitivity --- 88 dB
Impedance 4 ohms 8 ohms
Frequency Response 14-200Hz 45-50kHz
Drivers
Woofer Quantity 1 1
Woofer Size 13" 6"
Woofer Composition Not given Kevlar
Woofer Surround Material Not given Rubber
Tweeter Size - 1"
Tweeter Type n/a Soft-Dome
Aimable Tweeter No No
Midrange Driver N/A" N/A"
Physical Specs
Height 639.0mm (25.2") 280.0mm (11")
Width 366.0mm (14.4") 185.0mm (7.3")
Depth 102.0mm (4") 96.0mm (3.8")
Enclosure In-wall In-wall
Moisture Resistancy No No
Connections
Biamp Inputs No No
Other
Parts Warranty 5 Years 5 Years
Labor Warranty 5 Years 5 Years