New pair Custom 12" DVC 4Ω Subwoofers - $500 (South Overland Park)

Price is for both.
Here is a pair of newly built (all new parts) custom 12" subwoofers.
They have dual 1" stacked magnets, 3" copper voice coils, and high strength paper cone with carbon fiber cap.
1000W RMS tuned to 35Hz (Pop, Other) or 1200W RMS tuned to 40Hz (Rock, Country, Jazz).
Recommended enclosures below.
These are built better than the Rockford Fosgate Power T1 12" ($450 each) they use a smaller 2" coil and less magnet with 800W RMS.
Same with the JL 12W6v3-D4 ($900 each) also a smaller 2" coil and less magnet with 600W RMS.
Pictures show each speakers Theile Small Parameters.
These are the actual measurements and not an average of a production run.
Recommended ported enclosures size and tuning for both subs in a single box.
35Hz tuning with 48in^2 port area in a 6.
3ft^3 enclosure.
Ex: 4"h x 12"w x 11.
8"l port.
F3 of 28Hz use a 30Hz subsonic high pass filter of at least 12dB+ an octave.
40Hz tuning with 48in^2 port area in a 5.
25ft^3 enclosure.
Ex: 4"h x 12"w x 10.
38"L port.
F3 31 Hz use a 33Hz subsonic high pass filter of at least 12dB+ an octave.