Here's the C2 info, if you can git this sub it will be perfect for your budget and will be able to take more if you ever change your amp

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"