Hi Palomino,
I really didn't want to interject myself in this thread for obvious reasons.
Since I sell a speaker that uses the Betsy driver it's impossible for me to not have a slight bias ..... even though Caintuck Audio is a hobby as much as a business.
The audio hobby is very much dependent on personal taste and preference .... so the following comments are to be understood as such.
The speakers in the photo use two Hawthorne Audio Augie 15" drivers, two Visaton B200 drivers and a Heil Air Motion Transformer in an enhanced MTM configuration.
The Augie drivers were powered by duel plate amplifiers ..... one for each channel.
Anyone familiar with the Heil AMT driver knows that the high frequencies are excellent, probably world class. So, it shouldn't be expected that the top end of the Betsy driver will match the extension and air of the AMT.
Having said that, when listening to the Betsy baffles without any additional help on the top end, I don't feel that I'm missing anything. The top end is extremely natural sounding and things like bells and chimes sound very good as well as the upper harmonics of other instruments.
It has been my experience that it's very easy to be impressed by the "wow factor" of any component during the initial listening session, but long term listening often reveals that too much of anything creates listener fatigue. The natural sounding top end of the Betsy driver contributes to long listening sessions and that is important to me.
I have been a big fan of "low boy" open baffles for a long time.
Being able to look over the tops of the baffles and still have a full height image and sound stage is an amazing illusion and it allows me to focus on the music rather than the equipment.
The speakers in the photo produced a BIG sound ..... but as crazy as it sounds the little Betsy baffles produce a sound that is nearly as big and I can move the Betsy baffles with two fingers.
Moving those big baffles required two men and a boy .....
I prefer to have the bass drivers on separate baffles for a couple of reasons.
First, it allows me to keep the main baffles under 24" in height.
Second, while it is certainly possible to mechanically isolate the drivers on a single baffle to reduce vibration affecting the Betsy drivers ... it is easier in my opinion to just put them on separate baffles.
It has already been mentioned that being able to move the bass drivers around is useful for optimizing the sound from them. I have found this to be true.
I know that many folks are fans of "nearfield" listening and many people do not have the luxury of a large listening room, but unless a person has heard the Betsy drivers 10 to 12 feet from the listening seat they really haven't heard them.
Truthfully, at 15 to 20 feet from the baffles the sound resembles a live event.
The sound I was getting in the 17' x 35' room at my recently closed storefront was so good that many visitors didn't believe the music was actually coming from "those little speakers".
As a final thought, there is something about the sound of a single full range driver that is special ..... especially when powered by an amplifier like a Decware SET.
The coherency can be jaw dropping .....
To make the system truly full range, the bottom end needs to be enhanced ..... but that is easily and inexpensively done with an Augie or Eminence Alpha driver on a third baffle and a plate amp. A 12" Alpha driver works as well as a 15" Alpha ..... just a different sound. The 15" goes lower, the 12" is tighter and faster.
So ..... there's my 2 cents for what it's worth.
Whether a person buys speakers from me or builds their own using the Betsy drivers, the results are a lot of musical bang for the buck.
Happy listening,
Randy