Here's a pre sale for $99 each shipped, these are beefier than all of 600 watt subs and has a 3 inch coil vs the regular 2.5 inch voice coil
presale on Sub 12" 600watt $99
C2 Audio Threatcon-2
Specifications:
12" Threatcon-2 Subwoofer
600 Watts RMS
Available in Dual 4 Ohm and Dual 2 Ohm
Dual 2 Ohm: Threatcon-2 12d2
Dual 4 Ohm: Threatcon-2 12d4
3" Copper 4 Layer Voice Coil
Double Stacked 160 oz Magnet
High Current Flat Woven Tinsel Leads
Dual Spider Pack
Dual Stitched Non Pressed Paper Cone-
with Mid Excursion Foam Surround
Enclosure Recommendations:
Sealed: 1.0 - 1.25 ft^3
Ported: 1.5 - 2.0 ft^3 @ 35hzSealed: 2.0 - 2.50 ft^3
Ported: 3.0 - 4.0 ft^3 @ 35hz
T/S Parameters:
FS: 36.7HZ
VAS: 40.9 DM3
QES: .44
QTS: .40
BL: 16.8
MMS: 167.7G
SENS: 91.5 DB
XMAX: 28 MM
Woofer Dimensions:
EXT DIA: 12.48"
CUT OUT DIA: 11.18"
MOUNT DEPTH: 5.82"