Thanks to the power of the Internet, I have now found this system scattered between Belgium and Switzerland, and made another discovery - more on this later...
I had approached my good client Pierre Breart at Audioconseil in Uccle, the posh suburb of Brussels, where he has been operating for quite some time, bringing the pleasure of good music reproduction to a lucky and loyal clientele. He was my second best dealer, and share with me a passion for good food and wine, obviously sprinkled with good music!
I was hoping he would be able to access some of my products from of his past clients...and he found something of a rarity, a lone exemplar of an ACTIVE central subwoofer.
My guess is that we would have designed this just for him, as I do not recall selling many.
By co-incidence, a reader in Switzerland got in touch with me to find out more about a pair of ACTIVE SATs! Lucky day...
The SATs in their active version were invented for my German distributor, and ended up being quite a success there, and also in Norway, where my distributor, Martin Viktorin, ended up selling over a hundred pairs to the National Norvegian Radio.
As a further twist in the story, the amplifier was designed by a very good and astute dealer we had in Strasbourg.
His original design sounded sublime, but didn't pass the German inspection, as it was internally wired as a valve amplifier would be - so, in short, it looked quite messy inside, but the resulting sound was outstanding, primarily because of the perfect grounding of the circuit, reducing noise floor and IMD distortion to an absolute minimum. Unfortunately, I have no photos left of this product, and would very much like to find one pair to review.
So, I had to fight with my dealer, to get him to change his design to be more professionally made - at least on the surface...
Being the purist he was, he refused, and reluctantly gave me the circuit diagram for me to produce an "industrial" version myself - here is the result:
Don't get me wrong, it still work extremely well and I quote my contact in Switzerland here:
"although I didn't position the speakers too precisely, voices were nailed spot in
the middle of the speakers - amazing! With certain music the speakers actually
did what I love about a good speaker: disappeared! There was music - not sound!"
And these speakers are in fairly bad condition, having their foam suspension starting to desintegrate and fed but an iMac...
Now, let's have a look at the subwoofer.
This is actually one sample equipped with the best driver we ever used a double coil Cabasse 21 cm, (single coil in this active version, and a black membrane), specially made for us, and very expensive. It is the ancestor of what is used in the Sphere now, and it works wonders - specially when only using the lower two octaves (30-120Hz).
Using the driver downfiring against a known surface and a fixed distance gives a very linear bass response indeed (+/- 1db over that range)
Using an integrated amplifier helps adjust the levels betweem satelites and subwoofer. The very low cut off frequency ensures that it is difficult to hear the position of the subwoofer.
This active TRITON system would make a very good sub/rear channels add-on to the front channels of a 5.1 home theater system. I might soon be able to report on the results...
Below are a few photos of this unique product, courtesy of Audioconseil
It seems like there is a previous review of the active version. I would be grateful if somebody could find a copy for me. Merci d'avance.
You will have to sharpen your French (and your eyes...as the scan is not very good...) but at least everybody will be able to read the measurement results.
To be noted are the very linear impedance and phase curves, the very good transient response and a very flat amplitude response both on axis and at 30deg