528hz sold 3 of these, 1 blown, 2 working. I got a working one and another person is getting the other.
So, to help the other member who bought the other working sub, aswell as anyone else who has one or is curious, here is a tested TSP thread.
This subwoofer is allegedly a DD3510 with a C motor as far as i know.
Re = 4.2721 ohms
Fs = 39.7624 Hz
Zmax = 33.4441 ohms
Qes = 0.4738
Qms = 3.2351
Qts = 0.4132
Le = 4.5224 mH (at 1 kHz)
Diam = 235.6129 mm ( 9.2761 in )
Sd =43600.1681 mm^2( 67.5804 in^2)
Vas = 21.2040 L ( 0.7488 ft^3)
BL = 21.4401 N/A
Mms = 204.0410 g
Cms = 78.5195 uM/N
Kms =12735.6973 N/M
Rms = 15.7575 R mechanical
Efficiency = 0.2644 %
Sensitivity= 86.2403 dB @1W/1m
I took a gamble but the specs are PERFECT for me. I'm happy.