Originally Posted by Jish9
Does anyone else find it a little odd that they are claiming their 12 inch drivers dig down to 10Hz? Even with 2 KW of power, their voice coil can only displace the driver so far. They don't use a servo design either making it harder to believe. As a reference, the SVS SB16 Ultra (sealed box) only goes down to 16Hz with 1.5 KW RMS using an 8 inch voice coil! Before dropping $4500 on this bad boy, I would wait for actual real world testing.
It's not a single 12", its dual opposing 12". So lets say our woofers are flat (they aren't but the math is sooo much easier). That means the 12" cone has an area of around 113sq.in. A 15in cone would have 176sq.in, an 18in cone is only 254sq.in. That means the dual 12" woofer is only a bit underneath the surface area of an 18" woofer (yes the math will vary more with cones, but the general trend should be the same. If nothing else dual 12" can match/exceed a 15".
For those who are interested the 10" would be 78.5 and the 8" would be 50 which means in general the size comparisons would be 8->12 10->15 12->18.
There are also some genuine advantages to having dual opposing drivers as they help cancel each other out inside the box.
The actual spec sheet lists -6db at 8.5hz -3db at 10hz (centered on 100hz which is surprisingly specific), what they don't do is list the actual spl, so who knows how loud it can actually go to do this. Almost any sub can play "flat" if you limit the volume enough
I will also say, the 800D3 can play to 15hz with dual 10" drivers while in theory handling way more load (I'm fairly certain they are crossed at like 300-500hz). So the idea of 2 of those drivers with 2000w playing to 10hz in a dedicated subwoofer doesn't seem all that unlikely to me, and that's before you move them up to 12".
Originally Posted by Cal68
Maybe I am the exception, but as someone who has owned B&W 8XX series speakers for more than a dozen years, I've not had any inclination to buy "matching" subs from B&W. I love the B&W sound from their speakers, and will pay for it, but the cost and performance of their subs has left me cold. I think subs with better performance and value can be obtained from a number of other vendors such as SVS, Hsu and Power Sound Audio. I guess I am not convinced that it is necessary to match a sub with speakers from the same manufacturer.
Please note that I am not implying that Blacklightning is saying that it is necessary to match a sub with speakers from the same company! I know that he/she is just making an observation that this is what Magnolia and other stores will tell their uneducated customers!
You have to remember, there are a LOT of non-audiophiles who buy B&W speakers. Like a TON.