Yes you are under some misapprehensions.
Whether bass is tight or not has nothing to do with driver size, but the total system Qtc. If it is around 0.5 it will be tight. It will be very boomy and muddy over 0.8.
You are also confused about fast bass. A woofer is incapable of producing any attack transient by itself. A sharp transient requires the ability to at least produce a facsimile of a square wave. Even a 20 Hz square wave requires a substantial high frequency component to reproduce it. So fast bass from a sub is in and of itself an oxymoron. Any sub cut in below 80 Hz, is incapable of producing a transient by itself. The reason is that if you do Fournier analysis the sharp up stroke of even a very low frequency has a strong high frequency component.
There for the sharp attack comes from a sub with low Qtc integrated well with the other speakers. In fact the later is very hard to achieve. That is why I have designed and built true full range speakers and go subless. If you click on my signature you will see the speakers.
On an SACD of the opening of Aho's symphony number 12, there is a lot of Laplander rhythmic drumming, that requires superb bass attack. I'm unable to get even very expensive systems at high end dealers to reproduce this disc anything close to realistically. In fact it is widely reported on the net the disc is poorly engineered. I can assure you it is not, it is a tour de force. there are just few systems on the planet, that can likely reproduce it.
I figure that this SACD you are referring to is on the BIS label. Am I right?
Also, I wanted to mention that I recently installed three Dayton RSS390HF-4 subwoofers in the 3 cabinets which form the three front channels on my cinema system. They are in 7.5 cf cabinets tuned at 16.8 Hz. According to BassBox Pro, I should be getting an F3 of 20 Hz approximately. I figure that I should be able to get a flat 20Hz with active graphic EQ in the near future.
So far, I am satisfied with those RSS Series subs. I also built 2 three-way systems using the RSS315HF-8 with excellent results.
I am curious. Have you had experience with the RSS390HF-4?
Finally, if you like the Saint-Saëns Symphony No. 3, there is an excellent Reference Recordings SACD with the Kansas City Symphony under Michel Stern. You may already have it.
There are several 32 foot stop notes from a Casavant organ, a Canadian factory which has been in existence for more than 100 years.
For your info, that company is world renowned and it recently signed a contract to build 40 organs to install in China.
Thank you in advance. By the way, you have quite an interesting studio.
It's good to exchange positive comments and our common passion.