Friday, December 3, 2010

Atelier Rullit Projects

Atelier Rullit builds alnico and field coil drivers. They build alot of other gear but I find their drivers most interesting. I'd like to spend more time with a field coil speaker system.

Here is the RF-C805 field coil.

Excerpt fromt the site.

You see a very unique driver here - a 15" full range unit. It was under development since the end of 2007. At first it was planed as support for a front loaded horn with an 8" RF-C803. First listening tests revealed its huge potential and I decided to keep working on it hoping to create a full range unit. After trying various kinds of cellulose, I decided to employ a hybrid cone (of my own design). Sleepless nights resulted in total success. Real huge full-range driver was born.

Some applications may still need a tweeter. Sensitivity: about 100 dB. Weight: about 17 kg. 4 kg of copper were used for the field coil, which gives 1.5 times reserve of the magnetic field power. (2.5 kg could already provide 17000 Gauss in the gap).

Cone is of a unique Rullit hybrid design: Special Rullit cellulose in the center, balsa wood around (soaked by Rullit recipe), all on leather surrounds and traditional wooden spider.

Alnico full range driver.

They offer a glimpse of a new line of drivers in the works on their site.

Visit their site for a look at their crafted drivers.


  1. Attention! ! ! Oleg Rullit - the thief and the swindler!!!!!!!!

  2. Reputable makers are dropping like flies.

  3. Hi... Before I make a purchase from Oleg... Has anyone had any good dealings with him.?? And, does anyone own any of his Field Coil Compression Drivers.???
    Please.!!! Any information would be of great help.!!!

  4. I purchased a pair of 8 inch field coils (Lab 8) from him via eBay in October, and they arrived quickly, in good shape and sound extraordinary.

    1. Thanks for sharing your experience. Bet they will sound incredible!!

    2. What about his lesser cost driver (under 2000 euros field coil)? All the comments that I've read are anout his 8" that cost around 4000 euros or about his more expensive drivers.

  5. ahhaahahahahhahah sono dei rottami riciclati e accroccati alla cazzo venduti a migliaia e migliaia di soldi

  6. no longer available I wonder what happend

  7. no longer available I wonder what happend

  8. Im pretty sure that it uses Phenolic spider.