The bk Gemini is ok for small and medium sized rooms for hifi
For home cinema it's suitable for small rooms .
Ive owned subs £30-£2000 and the upper end ones are worth every penny and totally obliterate subs like the gemini. I'm sorry but you're completely wrong. I've got somethhing like +30db output at 20hz over the gemini. The Gemini will just blow up outputting 20hz at anything near usable movie volumes on heavy action scenes..calibrate your sub and play ready player one catalyst explosion scene at -10db..when I did I thought **** me that is scary, if felt like a real life pressure wave.
The Gemini is a only 10" sealed box sub. I personally would use the Gemini in the bedroom system.
It's not just the volume it's the frequency depth , impact and pressuration of the room. The bk simply cannot do that. There are no figures but it's not as good as the svs sb1000 and I have 24db more output at 20hz. It would take 10 of sb1000 to equal my dual subs
No way would I use Gemini in the home cinema it's simply not enough.
When I put a movie demo scene it's actually terrifying. I would say the pressuristion of the room is like firing a real gun, that same physical feeling.
As for white subs theres BK, and arendel off the top of my head. Svs possibly?