Haut-parleur Beyma 12KX
[12KX-8+8] Avis/Critiques 
This dual loudspeaker incorporates a 12” bass transducer, featuring a 3” voice coil diameter, edgewound aluminium ribbon wire, and a concentrically mounted 2” compression driver into an integrated voice coil gap magnet system. This design achieves high efficiency, smooth frequency response, low distortion, reduces phasing problems in the crossover region, and simplifies enclosure design.
Key features :
Exceptional power handling: 300 w AES (low frequencies) and 100 w AES (high frequencies)
Combination of a 12" bass loudspeaker and a 2" exit compression driver
L.F. unit: 3" (77 mm) edgewound aluminium ribbon voice coil
H.F. unit: 2.8" (72.2 mm) edgewound aluminium ribbon voice coil
Titanium diaphragm compression driver
Low weight due to the common magnet system for both units
Coherent response
Bass loudspeaker designed for the use in compact bassreflex cabinets
Technical specifications :
L.F. UNIT
Nominal diameter 300 mm. 12 in.
Rated impedance 8 ohms.
Minimum impedance 7.1 ohms.
Power capacity* 300 w AES
Program Power 600 w
Sensitivity 98 dB 2.83v @ 1m @ 2
Frequency range 35-3000 Hz
Recom. enclosure vol. 40 / 100 l 1.49 / 3.53 ft.3
Voice coil diameter 77 mm. 3 in.
Magnetic assembly weight 6.4 kg. 14.11 lb.
BL factor 14.5 N/A
Moving mass 0.045 kg.
Voice coil length 13 mm.
Air gap height 8 mm.
X damage 30 mm.
H.F. UNIT
Rated impedance 8 ohms.
Minimum impedance 6.5 ohms.@ 1kHz
Power capacity 100 w AES
Frequency range 800 - 17000 Hz
Sensitivity 1w @ 1m 105 dB
Voice coil diameter 72.2 mm. 2.8 in.
Flux density 1.4 T
BL factor 7.5 N/A
Dispersion 90°
Thiel and small parameters :
Resonant Frequency, fs 45 Hz
D.C. Voice Coil Resistance, Re 5.6 ohms.
Mechanical Quality Factor, Qms 10.4
Electrical Quality Factor, Qes 0.380
Total Quality Factor, Qts 0.370
Equivalent Air Volume to Cms, Vas 70 l
Mechanical Compliance, Cms 186 μm/N
Mechanical Resistance, Rms 1.49 kg/s
Efficiency, ηo (%) 2.9
Effective Surface Area, Sd (m2) 0.055 m2
Maximum Displacement, Xmax 3.5 mm.
Displacement Volume, Vd 200 cm.3
Voice Coil Inductance, Le@ 1kHz 1 mH
Materials :
L.F. UNIT
Basket: Cast aluminium
Cone: Paper
Surround: Plasticised cloth
Voice coil: Edgewound aluminium ribbon
Magnet: Ferrite
H.F. UNIT
Diaphragm: Titanium
Voice coil: Edgewound aluminium ribbon
Voice coil former: Kapton
Mounting informations :
Overall diameter 320 mm. 12.6 in.
Bolt circle diameter 300 mm. 11.8 in.
Baffle cutout diameter: Front mount 286 mm. 11.26 in. / Rear mount 280 mm. 11.02 in.
Depth 160 mm. 6.30 in.
Volume displaced by driver 7 l 0.25 ft.3
Net weight 7.85 kg. 17.31 lb.
Shipping weight 8.5 kg. 18.73 lb.
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