SERIE KX - Speakers FOCAL - Free user manual and instructions

USER MANUAL SERIE KX FOCAL

K2 Power subwoofer manual Congratulations on purchasing a product from the range, K2 Power. We are happy you share our passion, for "the Spirit of Sound". K2 Power subwoofers contain the very latest enhanced technologies, for high power handling, and unrivalled sound quality. To obtain the best results from this product, we recommend that you follow carefully all the information contained in this manual. If not followed correctly any fault observed, may not be covered by the guarantee. Warning Features Due to the high power handling characteristics employed, subwoofers from the K2 Power range are capable of producing extreme volume levels. Continued listening at high volume levels above 110dB, are regarded not ideal for listening pleasure. Listening above 130dB can permanently damage your hearing. Focal does not accept responsibility, for unlawful playing, in the event of a criminal prosecution. Please exercise restraint. Membrane/cone K2 Power Reference CKM sandwich composite, comprising of Kevlar®/foam/Kevlar® material structure. Extremely rigid structure, improved power handling, low distortion characteristics. The Focal guarantee only applies if the enclosed guarantee card is returned to us within 10 days of purchase. 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). Multi-ferrite motor unit Focals renowned multi-ferrite motor continues with increased x3 level stack (33 KX, 40 KX, 46 KX 4). Higher BL sum magnet power. Open access for natural cooling of the voice coil. Power hi-fi Designed for bass reflex enclosures. High efficiency SPLs for fast dynamic bass (46 KX 4). Spider braid sandwich All output braids whether single double or quadruple connections impregnated into spider, sandwiched to form one complete layer. Zero problem from lead-out wire fatigue. Zero problem from lead-out wire tapping against cone assembly. Chassis moulded from metal alloy Non magnetic, and inherently rigid structure. 09 English

Focal-JMlab - BP 374 - 108, rue de l'Avenir - 42353 La Talaudière cedex - France - www.focal-fr.com Tel. [phone] - Fax [phone] Due to constant technological advances, Focal reserves its right to modify specifications without notice. Images may not conform exactly to specific product. notice sub k2 power gb 1 7/01/04, 17:21:48

Simple connection: 4 ohms 33 KX / 40 KX

33 KX / 40 KX English 10

notice sub k2 power gb 2 Connecting in series: 4 ohms Connecting in parallel: 1 ohms 33 KX / 40 KX

Double connection: 2x2 ohms 7/01/04, 17:21:49 Installation Running-in period Connecting-up (general) Connections (33 KX and 40 KX) K2 Power subwoofers incorporate the very latest components. To ensure such complex mechanical elements work in harmony with the rest of your system, they must be allowed to function correctly in this environment. Such changes in temperature and humidity are regarded as very hostile. For K2 Power subwoofers to benefit, a running-in period must be used to ensure they are prepared for this. We recommend that once the system is ready for listening the subwoofers should be run-in at medium volume setting. The use of audio material that contains good low frequencies is ideal to gain their full potential. We recommend this running period be used for at least one week. After which the excellent performance of your K2 Power subwoofers can be fully appreciated. It is imperative the correct connection is always maintained to the subwoofer. The correct phase is important, especially when integrating it into a broad-bandwidth or component speaker system; such in the case of a 2 or 3 way set up. Not doing so will drastically reduce the overall performance. Connection to the subwoofer use the standardised system of, RED = positive +, and BLACK = negative -. This must be followed and inverted if the driver is installed in the reverse (inverted install). For those subwoofers with twin (33 KX and 40 KX) or quadruple connection (46 KX 4), careful understanding of the various parallel and series circuits must be determined first, by verifying compatibility with the amplifier load characteristics, and overall system integration. Both 33 KX and 40 KX subwoofers, use a dual voice coil, thus each consist of two input connectors. To achieve high power integration to your system, we recommend the two connectors, are connected in a parallel circuit formation (fig. C). In this situation, an impedance load of approximately 1 ohms will be present. 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. D). 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. E). 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. Fitting Connections (27 KX) Each subwoofer kit comes complete with its fixing kit. This consists of selftapping wood screws, metal inserts and threaded bolts, plus a reel of foam gasket material. Depending on whether the subwoofer is to be installed standard recessed flush-fit or inverted, requires careful examination before any cutting is attempted for example a rear panel installation (fig. A). The desired baffle location or custom made enclosure must be rigid and strong enough to hold the weight of the driver. We recommend the sealing gasket is attached to the driver, then the driver placed into position and attached securely in place. notice sub k2 power gb 3 The 27 KX subwoofer uses a single 4 ohms voice coil, thus consists of a single input terminal (fig. B). 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 7/01/04, 17:21:49 English 12

Connecting in parallel: 0.25 ohm

Connecting in: series / parallel connection: 1 ohm

Connecting in series: 4 ohms

Double connection in parallel: 2x0.5 ohm

4 amplifiers connected: 4x1 ohm notice sub k2 power gb 4 7/01/04, 17:21:50 Installation Connections 46 KX 4 Choosing the correct enclosure or acoustic load (general) 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. F, G, H). "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. I, J). "Quad amping" can be included, with 4x separate amplifiers, offering identical specifications. The impedance load will be approximately 1 ohms (fig. K). Again, each amplifier power and load rating must be compatible for 1 ohms nominal impedance. 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? The 46 KX 4 subwoofer has been developed exclusively to work in bass reflex enclosures. Due to the large surface area available, with high strength multi-ferrite motor structure, together producing high efficiency necessary for dynamic power SPL installations. Any bass reflex enclosure uses an acoustic suspension or spring, in the form of a port. The port whether a tube, or slot must be correctly calculated, concerning area and length to the volume chosen. The air that passes through the port is effectively the spring and pressure load on the subwoofer diaphragm. To reduce air whistling, the port should remain smooth internally, with maximum aerodynamic characteristics applied throughout. For a port-tube application, it is advised to use the maximum diameter possible corresponding to the appropriate length; this will further reduce wind turbulence. The enclosure structure should be strong and rigid throughout, not only due to the weight of the 46 KX 4, but notably for the amount of air pressure displacement produced from the diaphragm movement. 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. Too low a cut-off frequency and the general performance maybe reduced. Finally a process of "trial and error" can be used to define this aspect, for maximum enjoyment of your K2 Power KX series subwoofers. notice sub k2 power gb 5 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. 13 English 7/01/04, 17:21:50 27 KX Sealed enclosure 20 liters (0.71 cu. ft.) F - 3 = 48Hz / Fast and tight bass 33 KX Sealed enclosure 40 liters (1.41 cu. ft.) F - 3 = 41Hz / Punchy and dynamic bass 40 liters (1.41 cu. ft.) F - 3 = 44Hz / Deep and articulate bass 50 liters (1.77 cu. ft.) F - 3 = 40Hz / Deep and articulate bass SPL (dB) 1W/1m 30 liters (1.06 cu. ft.) F - 3 = 45Hz / Punchy and dynamic bass SPL (dB) 1W/1m

Frequency (Hz) 40 KX Sealed enclosure 40 liters (1.41 cu. ft.) F - 3 = 41Hz / Fast and tight bass

Frequency (Hz) 46 KX 4 Vented enclosure 80 liters (2.82 cu. ft.) F - 3 = 45Hz / Fast and tight bass 100 liters (3.53 cu. ft.) F - 3 = 40Hz / Punchy and dynamic bass 80 liters (2.82 cu. ft.) F - 3 = 36Hz / Deep and articulate bass 120 liters (4.24 cu. ft.) F - 3 = 37Hz / Deep and articulate bass SPL (dB) 1W/1m 60 liters (2.19 cu. ft.) F - 3 = 37Hz / Punchy and dynamic bass SPL (dB) 1W/1m

30 liters (1.06 cu. ft.) F - 3 = 42Hz / Fast and tight bass Frequency (Hz)

40 KX 33 KX 20l English 14

7/01/04, 17:21:50 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. P). K2 Power subwoofers are able of reproducing very high sound pressure levels. The construction should always remain strong and rigid, to eliminate any unwanted vibrations. A good material such as MDF (Medium Density Fibreboard) will effectively ensure this is possible. Choosing the correct thickness of MDF compared to the surface area decided, is also critical to ensure the enclosure does not vibrate. For this reason the general thickness recommended is 19mm MDF. The volume of the enclosure depends on the type of music your are listening to (hi-fi, dynamic bass...) (fig. L, M, N, O). If you decide to build your enclosure, pay attention to the following recommendations:

• Ensure that there are no air leaks at corners and fixings.
• We recommend the use of clamps for perfect assembly of the panels. The drying time of the glue must be respected.
• When using the 46 KX 4, we advise the use of a profiled port so that air noises are prevented.
• Add damping material (foam) inside the enclosure (do not use fiberglass) to cancel possible resonances. 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. 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? Why not build a "beauty box", invert the subwoofer, and make a feature of their specialist design. When choosing inverted mounting the phase must be inverted, so that the polarity is observed. More importantly, inverting the subwoofer has inherent advantages for the general performance. Primarily for sealed enclosures, the overall external dimensions can be significantly reduced, due to the saving of wasted volume displacement otherwise lost in traditional subwoofer installations. For example, up to 3 litres can be saved due to the same displacement lost by the array of multiferrites and large front and back plate assemblies and chassis. For the 46 KX 4, around 4 litres can be saved for it’s bass reflex enclosure. 15 English notice sub k2 power gb 7 7/01/04, 17:21:51 Specifications 27 KX 33 KX Nominal power 300W Maximum power 600W Sensitivity Cone Surround 40 KX 46 KX 4 400W 500W 1000W 800W 1000W 2000W 88dB 90dB 92.5dB 96.5dB K2 Composite Sandwich® K2 Composite Sandwich® K2 Composite Sandwich® K2 Composite Sandwich® Butyl Butyl Butyl High density foam 4 ohms 4 ohms (2x2) 4ohms (2x2) 4 ohms (4x1) VC diameter 65mm - 2.55in 65mm - 2.55in 65mm - 2.55in 77mm - 3.03in VC height 26mm - 1.02in 32mm - 1.26in 32mm - 1.25in 30mm - 1.18in Xmax 9mm - 0.35in 11mm - 0.43in 11mm - 0.43in 10mm - 0.39in 60x14mm - 2.36x0.55in 60x 14 mm - 2.36x0.55in 60x14mm - 2.36x0.55in 75x15mm - 2.95x0.59in 2106g - 4.66Ib 2916g - 6.42lb 2916g - 6.42Ib 8100g - 17.86lb Gap height 8mm - 0.3in 10mm - 0.39in 10mm - 0.39in 10mm - 0.039in Net weight 7.2kg - 15.87Ib 9.8kg - 21.6Ib 10.7kg - 23.58Ib 17kg - 37.47Ib 48Hz 39Hz 34.6Hz 29.4Hz Nom. impedance Magnet d x h Magnet weight

4.2 ohms (in series)

4.2 ohms (in series)

4.2 ohms (in series)

1.9mH 4.3mH (in series) 4.2mH (in series) 3mH (in series) Les 15.63mH 20.4mH 19.92mH 61.45mH Res

12.05N/A 16.76N/A (in series) 16.71N/A (in series) 27N/A (in series)