Also the traditional manufacturer of jamo wants again started in the high end range with the reference line. The brand new R 907 is a classical dipole with open baffle and dynamic loading.
- Jamo R 907
- Data sheet
This means that the bass driver at the bottom without additional deflection units increasingly in the acoustic short-circuit must work and move air from front to back, with only a small part of audible sound waves. A dipole is used to force higher level it needs bring strong drives, much membrane surface and a special chassis tuning, because otherwise expunged bass tones and the cones to the limit. The two stable jamo twelve ZOLLER seem exactly at these working conditions to be adapted with die-cast basket and chrome plating, the efficiency is but lower than in closed boxes, but still in the practical field.
The five inch midrange driver is also working to the back open and can therefore free play of resonances and the spring action of the trapped air, the dipole effect his sound at least in the real midrange is bundled as well. Not quite consistently it may seem so, that the tweeter does not follow the principle of building, but is designed as a direct registers fabric dome tweeter. Acoustically the jamo engineers assume however, that backwards emitted heights would rather harm the spatial sound image. In addition, the beam angle of the dome is quite clearly limited by the Horn-like sound leadership what in total although yields a different beam pattern as in midrange and bass, produced by the total energy emitted into the room but about a tie and thus a possible Uncoloured sound field.
An unusually shaped speaker is expected also an unusual sound that stands out. However, nothing similar to correctly played jamo as the neutral KEF reference 205/2, let no air for speculation, the open construction and the acoustic short circuit would have negative impact on bass pressure and volume. On the contrary, jazzy rock tones and loud drums were her true METIER, what proved Jacques Loussiers “Gavotte” (concert in f minor, “The best of play Bach”, Telarc) as well as Metallica’s “Sad But True” (“Metallica”, UMG). While the Geithain each met the jazz as the urgewaltigen metal with intellectual accuracy and less pressure and the KEF showed some inaccuracies in the upper bass, exactly the right blend of timing and massive sound met the R 907.
That was by no means at the expense their classical skills: Feinzeichnend and balanced she created an atmospheric as dynamic monument “Mars” from Holst’s “Planets” (Previn, LSO, note 1). Researchers and prominent as the deep spatial Geithain, but this ansatzloser, fundamental and punchier than the KEF 205/2. A speaker who knows no compromises and to Chamber music unleashed a dazzling display of enthusiasm and fun music from every genre of techno.
Jamo R 907
Technical data and test results
|Dimensions (W x H x D)||44.0 x 119,0 x 49,0 cm|
|Color||Black piano lacquer|
|Bass principle||way dipole|
|Number of ways||3|
|Working principle of full Active|
|Maximum volume upper value||105 dB|
|lower cut-off frequency (-3dB)||30 Hz|
|Lower cut-off frequency (-6 dB)||25 Hz|
|Nominal impedance (audio)||3 ohm|
|Balanced like punchy, precise and clean at all levels|
|Figure very direct installation not easy|
|Bass depth (bass Foundation)||95|
|Attention to detail (precision)||100|
|Maximum level (vitality)||90|
|Sound judgment||well over 99|
|tested in issue:||3 / 09|