Mode d'emploi FOCAL SERIE KX

[. . . ] Multi-ferrite motor unit Focals renowned multi-ferrite motor continues with increased x3 level stack (33 KX, 40 KX, 46 KX 4). Open access for natural cooling of the voice coil. Designed for sealed or closed box volumes Optimised for comparatively small volumes, being sealed. Producing a full deep bass experience, even at high volume levels (27 KX, 33 KX and 40 KX). [. . . ] For connection to the amplifier, it is important to ensure such low load is compatible. It is also possible to connect the voice coil into a series type circuit, producing an impedance load of approximately 4 ohms (fig. This is generally recommended if your amplifier is not compatible to low load impedances of less that 1 ohms. The 33 KX and 40 KX can also benefit from "Bi-amping" configurations (fig. It is important to ensure both amplifiers are of the same specification and power rating. Also a traditional 2 channel stereo amplifier (high power recommended) can also be used, allowing further installation flexibility. The 27 KX subwoofer uses a single 4 ohms voice coil, thus consists of a single input terminal (fig. Verify the output stage and if your amplifier has a bridging function, to gain further benefit, use it. Ensure it is compatible with a 4 ohms impedance load. 11 English F Connecting in parallel: 0. 25 ohm G Connecting in: series / parallel connection: 1 ohm H Connecting in series: 4 ohms I Double connection in parallel: 2x0. 5 ohm English 12 J Double connection in serie: 2x2 ohms K 4 amplifiers connected: 4x1 ohm Installation Connections 46 KX 4 Choosing the correct enclosure or acoustic load (general) The correct acoustic load, normally the type of enclosure and volume made available to the subwoofer, is of prime importance for maximum performance. All pistonic acoustic devices (in this case subwoofers) require a defined acoustic load to work correctly. This means the type of charge (sealed or bass reflex) and volume (litres / cubic ft) must be chosen wisely, to gain maximum performance. Never choose "any" ready prepared subwoofer enclosure. They may accept your subwoofer, concerning the hole cut-out size for chassis, but do they match the volume or type of charge as defined in the subwoofer parameters?Sealed / closed box enclosure All K2 Power subwoofers (except the 46 KX 4) have been carefully optimised to work in sealed or closed box enclosures. This type of enclosure ensures sub bass frequencies remain full and controlled. The available excursion of the sub is far more stable, for controlled linearity limiting distortion, ensuring maximum performance is maintained. The added benefit of a properly defined sealed enclosure, is that it remains comparatively small in size. Compared to a defined bass reflex enclosure, which normally has a slight increase in the sound pressure level, K2 Power subwoofers have improved power handling characteristics. Therefore this slight reduction of level can be compensated, with increased amplification. Bass-reflex enclosure The mighty 46 KX 4 subwoofer incorporates a unique feature, consisting of 4 individual wound voice coils, intertwined together on the same vented aluminium former. Each voice coil winding has an impedance of 1 ohm, giving greater flexibility. Note that core section of connecting cables and complete amplifier compatibility must be verified before, for load ratings from 0. 25, 1 or 4ohms (fig. "Bi-amping" can also be included for the 46 KX 4. Thus load impedance's of 2x0. 5 ohms and 2x2 ohms, can be included for parallel or series circuits (fig. [. . . ] ft. ) F - 3 = 37Hz / Deep and articulate bass SPL (dB) 1W/1m N Frequency (Hz) O SPL (dB) 1W/1m Frequency (Hz) 46 KX 4 Port dimensions (46 KX 4) Ø L 10 8 10 9 10 11 40 KX 33 KX 20l A B C D 300 300 410 190 27 KX 30l 40l 370 370 380 237 370 370 490 237 50l 370 370 605 237 60l 400 400 720 170 80l 450 450 730 190 100l 500 500 730 190 120l 500 500 850 190 English 14 P Building the enclosure Recommendations Building an enclosure Conditions of guarantee Building your chosen enclosure, whether sealed or bass reflex, shouldn't be regarded as a "complex job". Important observations should never be neglected, such as correct volumes, thick enough board material, with added bracing, correct sealing especially for sealed enclosures. See image attached for further understanding (fig. Inverse mounting of subwoofer (beauty box application) Because all K2 Power KX subwoofers use such large impressive multi-ferrite motor units, why hide them inside? [. . . ]