RAAL 64-10 Flatfoil True Ribbon Tweeter

This model is the smallest in terms of dimensions, yet not the weakest we offer. The housing is formed out of laser-cut steel plates. There are two chambers in the housing that are placed longitudinally, next to each other. Each chamber is stuffed with materials used for absorption of sound waves, in this case they are stuffed with real wool felt, not with the synthetic felt. The felt is being picked out very carefully because it must not contain any impurities in the fibers. The purity of this felt is higher than the purity of the felt used in the production of pianos. In each chamber there are two felts, one of which has a jagged top edge that looks into the ribbon itself, and the other is formed in step shape. The density and mass of each individual felt must be extremely precise. The maximum tolerance of each felt mass is +/- 0,05 grams. That’s why 90% of the felt ends up as waste when cutting it and measuring it.

In the housing there are two very strong neodymium magnets which are placed on both sides of longer edges of the ribbon. The third slightly smaller neodymium magnet is added and placed below the ribbon, which has the role of focusing and directing the magnetic field of the two main magnets onto the ribbon. This achieves a higher sensitivity of the speaker. The ribbon itself is made out of 8 microns thick aluminum foil, which is ironed and stiffened by a particularly critical process. This ribbon doesn’t have carrier foil made out of MYLAR, it’s in direct touch with air. This provides the smallest possible moving mass, several hundreds of times smaller than any classic DOME tweeter and far smaller than RIBBONS with a MYLAR carrier foil.

The result is shockingly rich, detailed, the sound image is unencumbered by any colorations.

The ribbon itself is fixated on the ends to the supporting frame via tensioners. After installation, the ribbon is being precisely tensioned in order to achieve optimal performance.

The model 64-10 isn’t user serviceable, which means that the user can’t replace the ribbon himself in the case of need, whereas the whole ribbon has to be replaced.

This is the only model where the adaptive transformer is placed on theo utside of the housing. The transformer is hand-made and as an integral part of the speaker it is absolutely reliable. It cannot break down. The FACE PLATE is laser-cut, hand processed, and the final processing is powder coating.

Model 64-10 can be used in small two-system book shelf speaker boxes in micro monitors, central speakers, as well as in larger sub-state three or fourway systems.

Like every other model, this one is characterized by exceptional openness, detail, spaciousness and depth of the sound image. The sound is fluffy, colorless, it will not hide or mask even the finest information read from the source.