ok good. looks like the voice coil is fine.
Only last thing I suggest you do is take out the subwoofer and make sure both terminals on the sub is connected and if it is ok I say your amp is bad.
Note: I have a pair of BP7006s which has amps on them and found out the subs were not working, but the light was on.
So I called DefTech and since I was under warranty they sent me a new amp and problem solved!
If you want to cut to the chase, I would just call DefTech and talk to tech support and see what they can do for you.
I read on here that people had their audio out of warranty and they still sent them replacement parts at no charge. They are great folks there, so just give them a ring.
*** Actually if you go to the speakers section here on AVS there is a support team from DefTech. Either PM, post a message or call them and let them know your issue.
HT: PJ: ?? , Screen: ??,B&W 684s, 685s, HTM62 / DIY SI 18" / port tuned- 17hz
Onkyo 809, iNuke DSP1000, Oppo 103 , PS4, HTPC- Lenovo q190.
| Media Room: Yamaha RX-A 820, PS3, Vizio 55 (M-Series) with in-wall Polk Audio RC series (5-channel), Sub1200 (dual) w/ DirectTV & PS3 / PLEX | Family Room: LED: Sharp 70" -Smart, DTV Client, PS3, Mirage MX 5.1 / HK Audio.