why? have you owned one? i never had a single problem with my 12k in my daily driver. worked great for me.
i have used both the SD8k and 12k
my aq3500.1 was louder then the sd8k the SD8k was heating subs up in less then 30 seconds ( could play full tilt allll day with aq) also didnt sound good...at all ( to me anyways)
the 12k..same thing but of course it had a little more power then the aq3500.1 didnt sound good.. sounded like a wet fart..
A 4300 watt board louder than an 8k board? Hmmmm idk...