Have 4 BNIB Ascendant Audio Havoc 15's with dual 1 coils:
280 shipped for 1
540 shipped for 2
1000 shipped for 4
You won't find these cheaper for new...this is a hella-discount off new prices. I have TONS references as a seller from ca.com, some I'm sure post here. If you need directed to any refs let me know.
Specs
Fs 29.0 Hz
Qms 6.42
Qes 0.50
Qts 0.46
Mms 290 g
Sd 810 cm^2
Vas 95.3 l
SPL 87.0 1W/1m
Bl 19.8 Tesla Meters
Xmax 30mm (one-way)
RMS 1250W