Procella is a well known and highly acclaimed Swedish company selling high end Home Theater speakers as well as speakers for cinema use. The founders Anders Uggelberg and Gerben Van Duyl used to work for DTS, where Anders was Director of Cinema Technology for DTS Europe. The brand was formed after Anders in 2005 was responsible for building the state of the art DTS headquarter cinema, where he found that the requirements where of such that they could not find any suitable speakers, and therefore decided to build their own. In 2006 Procella was founded. Read much more here.
Procella designs their speakers to have high output capability, and a controlled directivity. Looking at the 2 smaller speakers the P8 and the P6 MKII, being 2 way and of course needing suitable subwoofers.
I have myself been looking at improving especially my side and rear speaker setup, and have also come the the conclusion that controlled directivity is to be much desired.
The Procella speakers have gotten a lot of very good reviews and is a force to be reckoned with.
So how do they achieve the results, and What Drives Do They Use?
First clue is to be found on Seas Speakers home page, which declares that they are working proudly together with Procella, see here
Seas is on of the really old Scandinavian (Norwegian in this case) speaker companies used in so many high end speakers for good reason. Good choice.
The P8 uses an 8″ woofer with 40mm voice coil in a 15 liter sealed box. The tweeter is a 1.5” compression driver with a polyester diaphragm on elliptical constant directivity wave guide. The Xover is a 4th Order Linkwitz-Riley 1,6kHz filter with Baffle Step Compensation (BSC).
Looking at the pictures of the speaker, and knowing of the collaboration with Seas, a very good guess would be U22REX/P-SL from the Prestige Series. It uses a cone of woven polypropylene and the characteristic phase plug.
The tweeter is a bit more tricky, and just my best guess. As said it’s a compression driver, with a VC of 1.5 inch and a polyester diaphragm.
Looking at the picture on Seas site it for sure looks like a Sica CD60.38/N92 and it is consistent with the description above. Sica is an Italian manufacture of professional drives, maybe a little less known, but probably used in many pro gear.
The P6 uses a 6.5” driver with 40mm voice coil in 9 liter sealed box, and a 1” neodymium compression driver with a Polyester diaphragm on elliptical constant directivity wave guide with a voice coil of 1″, and a Asymmetric Linkwitz-Riley Xover at 1,9 kHz, with Baffle Step Compensation (BSC)
If you take a good look at the mid-woofer, knowing it is a Seas, it looks very much like the ER18RNX from the Prestige Series. It has a edge coated reed/paper pulp cone, very consistent with the picture above.
As for the tweeter on the P6 MKII, it is even more of a guess than for the P8, as no pictures seem to be available. From the description though and having a better guess for the P8, we could take a look at the line up from Italian Sica. Matching the overall description of neodymium, polyester diaphragm and a voice coil of 1″, there is only a few in the catalogue which matches. Best guess is the Sica CD78.26/N92
The waveguides look custom, but take a look at the Sica Q07020A Horn / Waveguide, it does look familiar, and matches the size of the P8 waveguide, just with a mat finish. But I would still guess Pocella get their waveguides manufactured separately though. The dimensions of the Sica Q07020A are; 200x160x100 mm, Horizontal Coverage: 90°, Vertical Coverage: 60°
As always the above is my best guesses, and is here for inspiration and a little insight on how the ultra high end speakers are build.
Could you do a clone? Well there is more to it than choosing the same drivers. And even that the drivers look like the stock ones, they might be modified by both Seas and Sica to suit Procella’s design perfectly.
The crossover is a different matter all together, and as we have very little information, it’s anyone’s guess of the implementation.
But being inspired is always good, so go ahead, use a good simulation program like VituixCad and give it your best shot.