That second pic has me thinking of the thread about putting floor standers in the wall....or does it just look like that?
They are in cabinet, and in fact just slightly protrude out of it. I designed the speakers to allow for that placement. One of the benefits of being a DIY designer and builder is to design for a specific purpose.
This is the FR at I meter on axis.
The FR of the two coupled cavity isobaric subs. They date from mid eighties before sub were in vogue. They just support and even out the lower end.
This is the system far filed FR at the main listening position.
No audyssey Eq is engaged. Note the impulse response. You can see the effect of subs placed at a distance, and that time delay can not be fully corrected. The first impulse is the two speakers and the second impulse is the subs.
The speakers are a retro design that I decided to do as homage to Raymond Cooke founder of KEF and one of my early mentors. It is loosely an update of one of his three way designs that used his B139 bass driver, a melinex domed mid and the T27 tweeter. The crossover uses his techniques of impedance correction in the crossover. Back in those days our amps were tube, which have a high source impedance, and therefore the amp will tend to follow the impedance curve of the speaker. So crazy impedance curves were best avoided. The speakers do use his very famous KEF B 139 bass drivers. This after nearly sixty years remains one of the best bass drivers around and there are highly sought after on the used market.
That picture was taken at their previous location at Benedict.
I have to say that I really do enjoy those speakers. Crossover points are 400 Hz and 4 KHz, so the Dynaudio dome mids handle the whole of the speech discrimination band. The tweeter is a mylar planar tweeter. That is a page out of the old Infinity book. I'm firmly of the view that if you are going to design a three way, the mid had better cover the whole speech discrimination band, otherwise the design is a waste of time and resources.
