No. A 3dB increase requires doubling power. To double the apparent volume (to make something sound "twice as loud") requires a 10dB increase.
The manufacturer's rated peak SPL is a bigger number. Even if this were accurate, it has nothing to do with how "loud" a speaker can get. The important specification is continuous average SPL. According to the independent lab tests that Yamaha commissioned (by a lab that used one of my speaker designs to check its calibration when it was first being set up), the DSR 12 is capabe of 118dB continuous maximum output. This is an accurate figure, and it tells you all you need to know. The data file with this information is on the downloads page for the product.
No. The DSR 12 will produce maximum SPL that is indistinguishable from that produced by the CLR. If you're looking for something louder than a CLR, you won't find it in a single-woofer two way speaker. It's those pesky laws of physics at work.
Thanks sir, exhaustive and relaxing as usual. Incredible how much mythology we common people can come up with when cheated by direct or indirect advertisement (I know what I'm talking about, I worked as a senior copy in an adv company LOL).