SLAPZ Car Audio Smackdown DVC 2 ohm 18” competition Subwoofer.  With a 4” black coated voice coil, weighing in at 55 LBS and a 7000 watt max rating, you hit them low lows all day long and all on a budget. After a ton of testing and R&D we know these monster subwoofers are gonna not only create a windstorm in your vehicle, but shake the concrete wherever you go.
RMS ……….................…3500 Watts
Peak …………..........…….7000 Watts
Impedance...................DVC 2 ohm (1 ohm parallel, 4 ohm series)
Voice Coil diameter …..4” 4 layer black coated 
Pressed paper cone with carbon overlay 
High roll foam surround
400oz Y35 Quad stack magnet
Double layer Cotton DuPont blend spider pack 
Dual Tinsel leads 
10ga OFC direct leads
Overall Diameter...........18.3
Baffle cutout diameter..16.8
Mounting depth………….11.25”
SPL 1w/1m………………….85
FS …………..…..........…….25Hz
QTS............................. .69
QES............................. .80
QMS............................  5.13
VAS.............................. 102L
BL………………………………16.79
RE………………………………1.207
Xmax...........................  30mm
Suggested ported box with 5.3-5.7cu/ft
Suggested port tuning 27-32Hz
To power these subwoofers properly, a 5000 watt 1 ohm monoblock amplifier per subwoofer is at the mechanical limit of the sub, and would be at the RMS power handling with rise. We do not suggest a larger amplifier or failure can occur.