Vifa Oslo Portable Bluetooth Speaker
Meet Oslo, Vifa's perfectly groomed Bluetooth portable loudspeaker including a powerful battery with magnificent musical qualities. No bragging, no bling. Simply made to be noticed. See the softness, sense how the cover carefully encapsulates the technology inside. Your first time with Oslo will touch your eyes and open your senses. The vivid colours, the surprising texture, the sensation that there’s much more below the surface. The embroidered volume-buttons at the front, hinting: I am a loudspeaker. Inviting you to approach, explore, discover.
Oslo is for real. Oslo is authentic, Oslo is genuine. An upright, compact design that whispers ‘Move me around, place me wherever you want.’ It’s Nordic aesthetics at its finest: Non-intrusive and discreet, yet remarkably confident about the statement it makes in any interior. A soft texture. A warm touch. The surprising feel of Oslo comes from its wool cover. Selected yarns carefully woven into a specific pattern, designed by Kvadrat. On the inside, the Vifa Oslo speaker features dual 50mm full-range drivers designed by Vifa, dual 65mm Vifa-designed force-balanced woofer units supported by dual passive bass radiators.
The Vifa 50mm full range driver act as midrange and tweeter at the same time and thereby handles the frequency range from approx. 250Hz up to 18000Hz. Left and right channel full range drivers are spaced apart as much as possible and angled slightly backwards and to the sides to satisfy optimal performance at various listening heights and maximum stereo width. It sits in its own separate enclosure to avoid modulation from the woofers and for exact control of roll-off characteristics. The full range driver is designed with a rigid and light aluminum cone and dust cap with specially designed geometry for smooth and extended frequency response. A vented aluminum voice coil former ensures low moving mass and good cooling properties. A copper cap on the pole piece helps to reduced unwanted distortion and extends the frequency response. The powerful Neodymium magnet ensures high efficiency in a compact size. It all adds up to a very coherent and natural reproduction of the midrange and treble frequencies bringing out that authentic sound experience.
The Vifa Force Balanced Woofer incorporates two identical 65mm diameter custom made woofers mounted back to back. The Force Balanced Woofer is positioned in the speaker enclosure so that one woofer is radiating from the front side and the other is radiating from the rear side. Both woofers move in and out at the same time but due to the 180 degree opposite orientation, the mechanically induced vibrations that would normally be transferred to the enclosure are outbalanced by the opposite movement. The two woofers are mechanically fixed to each other – rear side against rear side – forming a very rigid and solid construction that forms a perfect platform for the woofer to start and stop with great precision and also to maintain the precise and undisturbed micro movements of the woofer. This enhances bass precision greatly and forms a very strong mechanical connection between front side and rear side of the speaker enclosure. This leads to lower coloration and lower mechanical vibration noise.
The Vifa Passive Radiator uses a 45mm x 80mm flat rigid cone that moves with a resonance frequency determined by a precisely calculated weight/mass mounted in a soft linear long-throw suspension. The Passive Radiator takes up no space inside the cabinet and creates no noise. The Symmetric Passive Radiator design by Vifa uses two passive radiators mounted on opposite sides of the speaker cabinet at equal distances from the active Force Balanced Woofer. This outbalances the mechanical impact on the cabinet and ensures same work load on both woofers and both passive radiators. It all adds up to a very impressive bass reproduction from a physically small speaker.