Peavey's 12" BWX Neo Subwoofer features a Kevlar® impregnated cellulose cone. The aluminum ribbon wire voice coil is wound on a polyimide-impregnated fiberglass former with Nomex® stiffener and solderless diffusion welded OFHC copper leads.
 Features
 - Lightweight neodymium magnet structure
 - Kevlar® reinforced cone for increased strength
 - Die-cast aluminum frame
 - High power handling
 - Polyimide-impregnated fiberglass former with Nomex® stiffener
 - 4" diameter aluminum ribbon voice coil
 - Solderless diffusion welded OFHC copper leads
 
Specifications
 - Power Handling (RMS): 650 Watts
 - Power Handling (max): 1,300 Watts
 - Impedance: 8 ohms
 - Frequency Response: 50 to 3,500 Hz
 - Sensitivity: 96.9 dB 1W/1m
 - Voice Coil Diameter: 4"
 
THIELE-SMALL PARAMETERS
 - Resonant Frequency (Fs): 56.1 Hz
 - DC Resistance (Re): 5.43 ohms
 - Voice Coil Inductance (Le): 0.36 mH
 - Mechanical Q (Qms): 9.51
 - Electromagnetic Q (Qes): 0.45
 - Total Q (Qts): 0.43
 - Compliance Equivalent Volume (Vas): 1.93 ft.
 - Mechanical Compliance of Suspension (Cms): 0.14 mm/N
 - BL Product (BL): 15.13 Tm
 - Diaphragm Mass Inc. Airload (Mms): 50.7g
 - Maximum Linear Excursion (Xmax): 0.36 mm
 - Surface Area of Cone (Sd): 520 cm
 
MATERIALS OF CONSTRUCTION
 - Cone Material: Paper / Kevlar
 - Voice Coil Wire Material: Aluminum
 - Voice Coil Former: Kapton® / Polyimide
 - Basket / Frame Material: Cast Aluminum
 - Magnet Material: Neodymium