PRODUCT Sonus faber Lumina V
TYPE 3-way floorstanding loudspeaker
DIMENSIONS (WxHxD) 280 x 1,049 x 373mm
29mm silk dome tweeter
150mm pulped paper midrange driver
2x 165mm pulped paper bass drivers
Quoted sensitivity: 89dB/1W/1m (4ohm)
DISTRIBUTOR Fine Sounds UK
When first launched, the Lumina range represented a bit of a gamble for Sonus faber but it seems it seems to have paid off. The original small range of speakers was something of a departure for the company with their flat-sided cabinets and different finish, but the arrival of additional models suggests there’s a commercial appetite for them. We looked at the Lumina II in HFC 478 and now it is the turn of the flagship Lumina V.
At first glance, it looks identical to the Lumina III, which we reviewed back in HFC 469. Both are three-way floorstanders, where bass duties are shared between a pair of drivers. The key difference is one of scale. The Lumina V uses a pair of 165mm mid/ bass drivers rather than the 150mm units that the smaller speaker opts for. These are mounted in a cabinet proportionally identical to the Lumina III, but a fair bit larger. The Lumina V is over a metre tall before the spikes are fitted and beyond the numbers, this feels like a much more imposing proposition than the III.
The two higher-frequency drivers remain the same as before. The tweeter is a 29mm soft dome making use of Sonus faber’s trademark ‘Damped Apex Dome’ system, while the midrange is a 150mm paper cone, identified by its ‘Sf’ branded phase plug. What’s interesting is that in the Lumina V these identical drivers have different crossover points to the III. This isn’t too surprising at the lower end given the larger bass drivers and the Lumina V moves to a 260Hz crossover point from the 350Hz of the Lumina III. The handover to the tweeter is also dropped, though, now happening at 2.6kHz; a full 900Hz lower than the smaller III.
The reason for this is that the mounting arrangement of the midrange driver in the Lumina V, while externally identical to the III, is rather different internally. An enclosure within the cabinet modelled on a lute houses the midrange driver and tweeter. Sonus faber has employed this process on more expensive models and says that it helps to control standing waves within the cabinet while ensuring that overall rigidity is increased.
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