Sorry to up so old thread but..
I've been into the blown fuse problem trying to fix for some bros here.
I strongly suggest that it's a heng and suay issue if you send your speakers to SLS and fix it.
You might get it back the same subwoofer on the exterior. But you'll never know what they did inside. I've gotton one bro's subwoofer back from Si*** as it's in si**a for quite a few months, when i was about to fix it, i found out that the screws were out. Differnet lengths, some screws were missing.
Nevermind, i opened up and check inside. More horrifying is the power board is missing! I guess they are doing some swapping of power board to get one or two lucky subs to be working and return back to customer. So those who actually left the subwoofer in the shop for months, i guess GG liao. Your parts inside are scattered all over other subwoofers.
Just some information for bros here.