User manual FOCAL SUBWOOFER K2 POWER

[. . . ] Multi-ferrite motor unit Focals renowned multi-ferrite motor continues with increased x3 level stack (33 KX, 40 KX, 46 KX 4). 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). Spider braid sandwich All output braids whether single double or quadruple connections impregnated into spider, sandwiched to form one complete layer. [. . . ] 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. 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. 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. 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. "Quad amping" can be included, with 4x separate amplifiers, offering identical specifications. Again, each amplifier power and load rating must be compatible for 1 ohms nominal impedance. Cut-off frequency Generally, it is accepted the frequency scale is from 60 to 100Hz, depending on many parameters (cabinet loading, exterior load of vehicle interior etc, etc). if in doubt , we recommend a cut-off frequency of approximately 80Hz be selected. Too high a cut off frequency and the "staging" will be uneven. the bass frequencies will become directional. [. . . ] If the sound is "closed-in" then remove some at the damping material. All Focal loudspeakers are covered by guarantee drawn up by the official Focal distributor in your country. Your distributor can provide all details concerning the conditions of guarantee. Guarantee cover extends at least to that granted by the legal guarantee in force in the country where the original purchase invoice was issued. [. . . ]