Focal
ISU 690
ISU 690
2 separate way kit – 69cm woofer
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With the ISU690 2-way separate kit, take advantage of the perfect Focal sound compromise - easy installation to improve your in-car audio installation. With its large emissive surface and its Focal innovations, it ensures a good descent into the bass and very significant power handling. It is also equipped with separate filters to facilitate door mounting.
SLIM PROFILE
ISU690 has a very low mounting depth (just 8.35 cm) compared with its large emissive surface, making it a compact, high-performance kit.
OPTIMAL INTEGRATION
Thanks to a connector with integrated crossovers and a salad bowl designed for optimum integration, mounting the loudspeakers is a breeze. They can be easily installed in a variety of vehicles, and are ideal for certain Ford® and Toyota® models.
COMPLEMENTARITY
The aluminum/magnesium tweeter delivers clear, detailed treble. It is also perfectly compatible in timbre with loudspeakers with Polyglass diaphragm loudspeakers, which deliver natural, uncolored sound.
SPECIFICATIONS
Sound - Acoustics
- Product type : 2 -way separate kit
- Membrane : Polyglass
- Tweeter : 164x235 mm
- Filter : Integrated
- Frequency response (+/- 3dB) : 55Hz -21kHz
- Maximum power : 160 watts
- Motor : Ferrite
- Nominal Impedance : 4 Ω
- Nominal power : 80 W RMS
- Sensivity : 93.6 dB
- Suspension material : Butyl
Sound - Electronics
- RMS power : 80 W RMS
Design
- Depth behind surface (Mounting depth) : 49 mm / 1.9 in
- Cut-Out diameter : 143 mm / 5.1 in
- Weight : 1250 g / 2.7 livre
TECHNOLOGIES
TWEETER IN AL/MG
Treble finesse
Membrane shape and materials are essential. For the finest treble, our engineers have patented the inverted dome tweeter, a Focal signature. The inverted dome shape offers the advantage of low directionality and a small-diameter, lightweight coil for better acceleration. As for the materials used, they combine the key points of a good loudspeaker: aluminum increases dome rigidity and reduces distortion, while the addition of magnesium provides excellent damping. The surround that connects the dome to its support uses Poron, a shape-memory material. This surround is derived from the famous Utopia Beryllium tweeter, and reduces distortion by a factor of three between 2000 Hz and 3000 Hz, where the ear is most sensitive.
POLYGLASS MEMBRANE
Well-defined mids
The diaphragm, the key component of a loudspeaker, is at the heart of our acoustic engineers' research. Polyglass technology, exclusive to Focal, consists of applying fine glass microbeads to a cellulose pulp cone. This process reconciles the excellent damping of paper with the rigidity of glass. The stiffness index is almost 10 times that of polypropylene. Adjusting the mass-rigidity-damping ratio results in a remarkably linear frequency response curve, right from the membrane design stage. This innovation also significantly increases definition in the midrange register.
