Damped Apex Dome Tweeter

All of the models share the same tweeter. This is actually identical to the tweeter in their more expensive Sonetto series. If you look closely at the soft silk diaphragm you will see a small vertical assembly that barely touches the very apex of the tweeter. At the point of contact, it is cone-shaped. Fabric dome tweeters have phase anomalies that occur right at the apex of the dome. Silk dome tweeters have always had a great sound but this cancellation caused some high-frequency roll-off. Many speaker companies have moved to metal dome tweeters to get more extension, but there is something magical about the sound of a silk dome. By ever so slightly pressing in on the dome at the very apex, these cancellations do not happen and you get far more extension. This is a very creative idea the engineers at Sonus Faber came up with that you will see in all of the speakers. Their innovative technology allows for a more extended yet very smooth and natural high-frequency presentation, which has become part of the legendary Voice of Sonus Faber.

Stealth Reflex Port

Another part of all of the Lumina also comes from their more expensive models. Having a port on the rear of a speaker is very simple from a design standpoint. You see this on a lot of speakers. However, a rear-firing port limits your placement options as it will interact with the wall behind it. Sonus Faber came up with a very unique type of port called their Stealth Reflex Port. The bookshelf and center models sit on top of this special port which as an added bonus gives them a pretty cool look compared to a typical bookshelf speaker. The port for those is front-firing — meaning you can put them in a bookcase or close to a rear wall and still get great sound. The floorstanding speakers have the same type of port but it fires down which also frees up far more placement options.

Custom Made Crossover Components

The crossover is the invisible but very important part of every speaker. It essentially directs what sounds go where and if corners are cut in its design, even the best speaker drivers will never produce the sound they are capable of. Crossovers are made up of many components but the capacitors that do the filtering are by far the most important. The Lumina speakers, like all Sonus Faber models, have custom made capacitors designed specifically for Sonus Faber. That is pretty rare in the world of speakers and to see it at this price point shows incredible dedication to producing the best sound possible.