Moteur à compression JBL 2450J
[2450J-16] Avis/Critiques En utilisant la conception "Coherent Wave phasing plug", ce moteur à chambre de compression offrent une combinaison cohérente entre une plus grande puissance acoustique et une meilleure réponse dans les hautes fréquences.
Le 2450/J est équipé de masses magnétiques Néodyme permettant des performances électro-magnétique équivalentes à celles d'une masse standard trois fois supérieur.
-100 watts continuous program at 500 Hz
-150 watts continuous program at 1 kHz or higher
-Neodymium rare-earth magnet structure provides high output, light weight, and compact size
-Coherent Wave™ phasing plug design for increased high-frequency output
-100 mm (4 in) pure titanium diaphragm with radial-rib topology and patented three-dimensional diamond pattern suspension
-100 mm (4 in) edgewound aluminum voice coil
-150 watts continuous program at 1 kHz or higher
Throat Diameter: 49 mm (2 in)
Nominal Impedance: 2450H 8 ohms
2450J 16 ohms
Minimum Impedance: 6 ohms (H), 12 ohms (J) @ 5 kHz
DC Resistance: 4.3 ohms (H), 8.5 ohms (J) ± 10% @ 25%
Power Capacity¹: 100 W continuous program above 500 Hz
150 W continuous program above 1 kHz
Sensitivity: 111 dB SPL, 1 W @ 1 m on-axis on horn²
118 dB SPL, 1 mW on plane-wave tube³
Nominal Efficiency: 30% (500 Hz to 2.5 kHz)
Frequency Range: 500 Hz to 20 kHz
Recommended Crossover: 500 Hz or higher, 12 dB/octave minimum
Diaphragm: 0.05 mm (0.002 in) pure titanium
Voice Coil Diameter: 100 mm (4 in)
Voice Coil Material: Edgewound aluminum ribbon
Flux Density: 1.9 T (19,000 gauss)
B1 Factor: 12.7 (H) N/A
18 (J) N/A
Positive voltage to black terminal gives diaphragm motion toward the phasing plug
Dimensions: 167 mm (6 in) diameter
139 mm (5 in) depth
Mounting: Four ¼-20 threaded holes, 90° apart on 101.6 mm
(4 in) diameter
Net Weight: 4.8 kg (10½ lb)
1- Continuous program is defined as 3 dB greater than continuous pink noise and is a conservative expresssion 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, with a high-pass filter set at the specified lower limiting frequency for two hours duration
2- Sensitivity measured with 1 W input at 1 m distance on axis from the mouth of a horn with a Q off 3 averaged in the 2 kHz octave band
3- As specified by recognized standards organizations, sensitivity is measured with the driver coupled to a terminated tube.
The JBL sensitivity rating represents the SPL in a 25 mm (1 in) terminated tube, using a 1 mW input signal (0.126 V into 16 ohms) swept from 500 Hz to 2.5 kHz. The sensitivity rating with a 1 W input would be 30 dB greater.
|
