Moteur à compression JBL 2426J
[2426J-16] Avis/Critiques Le JBL 2426J est un moteur à compression haute fréquence de qualité professionnel intégrant un diaphragme au titane permettant d'accroître sa solidité et sa réponse en fréquence. Il est idéal pour les applications nécessitant un facteur de pénétration important tout en maintenant une large bande passante.
-25 mm (1 in) horn throat diameter
-Alternate 1 3/8” - 18 screw mounting
-70 watts continuous program at 800 Hz
--100 watts continuous program above 1.2 kHz
44 mm (1¾ in) pure titanium diaphragm
-Patented diamond-pattern diaphragm suspension
-44 mm (1¾ in) edgewound aluminum ribbon wire voice coil
-Copper-plated pole piece for reduced inductance and increased high-frequency output
Throat Diameter: 25 mm (1 in)
Nominal Impedance: 2426H - 8 ohms
2426J - 16 ohms
Minimum Impedance: 5 ohms (H), 9 ohms (J) @ 5 kHz
D.C. Resistance: 3.3 ohms (H), 6.5 ohms (J) ± 10% @ 25°C
Power Capacity1: 70 W continuous program above 800 Hz
100 W continuous Program above 1.2 kHz
Sensitivity: 107 dB SPL, 1 W @ 1 m, JBL 2344A horn2
110 dB SPL, 1 W @ 1 m, JBL 2370A horn2
117 dB SPL, 1 mW on plane wave tubes
Nominal Efficiency: 25% (800 Hz to 2.5 kHz)
Frequency Range: 500 Hz to 20 kHz
Recommended Crossover4: 800 Hz or higher, 12 dB/octave slope minimun
Diaphragm: 0.05 mm (0.002 in) pure titanium
Voice Coil Diameter: 44 mm (1% in)
Voice Coil Material: Edgewound aluminum ribbon
Flux Density: 1.8 T (18,000 gauss)
Bl Factor: 6.3 N/A(H)
9.3 N/A (J)
Positive voltage to black terminal gives diaphragm motion toward phasing plug
MOUNTING INFORMATION:
Mounting: Three ¼-20 threaded holes, 120° apart on 57.2 mm
(2¼ in) diameter
Front snout may be removed (unscrewed) to expose
standard 1 3/8 in -18 screw threads
Dimensions: 149 mm (5 7/8 in) diameter
104 mm (4 1/8 in) depth
Net Weight: 4.3 kg (9½ lb)
1- Continuous program is defined as 3 dB greater than continuous pink noise and is a conservative expression of the transducer’s ability to handle normal speech and music program material. Continuous pink noise power ratings are rested with pink noise input having a 6 dB crest factor for two hours duration, per AES standard.
2- Sensitivity measured on-axis in the far field with 2.83 V rms at 8 ohms or 4.0 V rms at 16 ohms and referred to 1 meter distance calculated by inverse square law. Listed sound pressure level (SPL re 20 uPa) represents an average from 1 kHz to 4 kHz.
3- As specified by recognized standards organizations, JBL plane wave tube measurements represent the SPL in a 25 mm diameter terminated tube, using a 1 mW input signal (0.126 V rms into 16 ohms, 0.089 V rms into 8 ohms) swept from 800 Hz to 2.5 kHz. The sensitivity with a 1 W input would he 30 dB greater.
4- A 2426 can be used to 500 Hz; however, power capacity will be reduced to 20 W continuous program in the region between 500 Hz and 800 Hz. JBL continually engages in research related to product improvement. New materials, production methods, and design refinements are introduced into existing products without notice as a routine expression of that philosophy. For this reason, any current JBL product may differ in some respect from its published description, but will always equal or exceed rhe original design specifications unless otherwise stated.
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