BMS BMS4545NDL 4545 ND – 1″ Neodymium high-frequency Driver 80 W 8 Ohm

1" High Frequency Neodymium Compression Driver

BMS4545NDL is a powerful 1" professional compression driver that delivers superb sonic quality in a very small package. The unique BMS annular diaphragm together with the cost effective, high energy Neodymium magnet assembly offers an economical solution for a wide variety of high level professional reinforcement system applications.

BMS4545NDL achieves very high sensitivity and linear frequency response up to 20 kHz. The sound of BMS4545ND is extremely transparent and detailed, it has an exceptional dynamic range and produces even the most complex music signals with depth and definition.

• Type: Compression Driver
• Throat Diameter: 1“
• Throat Diameter: 25,4 mm
• Voice Coil Diameter: 1,75“
• Voice Coil Diameter: 44,4 mm
• Overall Diameter: 85 ± 0,1 mm
• Bolt Circle Diameter: 57,15 mm
• Depth: 48 mm
• Nominal Impedance: 8 ohms
• Nominal Power Handling: 80 W
• Maximum Power Handling: 400 W
• Sensitivity (with Horn 1W/1m): 113 dB
• Frequency Range: 500 - 20000 Hz
• Recommended Crossover Frequency: 1300 Hz
• Voice Coil Former: Kapton
• Diaphram Material: Polyester
• Magnet Material: Ceramic
• Mounting Thread (screw on): 1 3/8" - 18N screw

70W AES compression driver, 1.75 διάφραγμα τιτανίου, 16Ω

The model 2426H is a professionalquality high frequency compressiondriver which incorporates JBL'stitanium diamond diaphragm. Thistitanium diamond structure combinesthe ruggedness of phenolic andcomposite-type diaphragms with theoutstanding frequency response offragile aluminum and exotic metaldiaphragms.

JBL's exclusive suspension, consistingof a three-dimensional diamondpattern, reduces bendingstresses in the diaphragm supportstructure. The depth of the diamondpattern is closely controlled toprovide predictable frequencies forthe 2nd and 3rd normal resonancemodes and for the basic suspensionresonance.

The mathematically determinedphasing plug consists of concentricexponential horns to minimize phasecancellations. Phasing plug, throat exittube and diaphragm assemblies areidentical to the previous model.

All cast parts and tolerances are held to the same levels traditionally associated with JBL designs. Additionally the press-fit assembly and interlocking parts assure greater resistance to the mechanical shock. Diaphragm assemblies are rim centered rather than pin mounted, for instant interchange ability and ease of field service.Mounting is provided for standard25 mm (1 in) three bolt pattern. The front snout may be removed(unscrewed) to allow standard 1 3/8" -18 screw mounting. Through holes for external attachment points are also provided. A machined ring of copper surrounds the pole piece to counteract the inductance of the voice coi1 at high frequencies. After manufacture, the frequency response of each driver is tested for conformity to rigid performance standards.

The 2426H is offered in an 8 ohm impedance, and the otherwise identical 2426J is offered in a 16 ohm impedance.

The 2426H features a removable flange to expose a 1 3/8“-18 snout for screw-on type horns.

• Throat Diameter: 25 mm (1 in)


• Nominal Impedance:2426H - 8 ohms2426J - 16 ohms


• Minimum Impedance: 5 ohms (H), 9 ohms (J) @ 5 kHz


• D.C. Resistance: 3.3 ohms (H), 6.5 ohms (J) +/- 10% @ 25C


• Power Capacity:70 W continuous program above 800 Hz100 W continuous Program above 1.2 kHz


• Sensitivity:107 dB SPL, 1 W @ 1 m, JBL 2344A horn110 dB SPL, 1 W @ 1 m, JBL 2370A horn117 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:Three 1/4-20 threaded holes, 120 apart on 57.2 mm

(2-1/4 in) diameterFront 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 (9-1/2 lb)

Ηf driver νεοδυμίου 1'' 100W διάφραγμα
τιτανίου 106dΒ προτείνεται για εφαρμογές line
array.

1” high frequency compression driver, titanium
diaphragm, flat aluminium wire voice coil, low distortion,
extremely good response from 1.5 kHz. to 18 kHz.

Specifications1
Throat Diameter 25 mm. (1 in.)
Nominal Impedance 8 Ω
Minimum Impedance 7.6 Ω
Power Handling
(1500 –20000 Hz)
Nominal2 60 W
Continuous Program3 120 W
Sensitivity (1W/1m)4 106 dB
Frequency Range 1 – 18 kHz
Recommended Crossover5 1.5 kHz
Voice Coil Diameter 44 mm. (1.7 in.)
Winding Material Aluminium
Inductance 0.11 mH
Diaphragm Material Titanium
Flux Density 1.7 T
Also available in 16 Ω, data upon request

Mounting and Shipping Informations
Two M6 holes 180° on 76 mm. (3 in.) diameter
Three M6 holes 120° on 57 mm. (2.2 in.) diameter
Overall Diameter 134 mm. (5.3 in.)
Depth 68 mm. (2.7 in.)
Net Weight (1 unit) 2.9 Kg. (6.4 lb.)
Shipping Weight (4 units) 12.5 Kg. (27.5 lb.)
Shipping Box (4 units) 300x160x180 mm.
(12x6.3x7.1 in.)
1 Driver mounted on B&C ME 45 horn.
2 2 hours test made with continuous pink noise signal (6 dB crest factor) within
the specified range . Power calculated on rated minimum impedance.
3 Power on Continuous Program is defined as 3 dB greater than the Nominal
rating.
4 Applied RMS Voltage is set to 2.83V for 8 ohms and 4V for 16 ohms Nominal
Impedance. Average SPL from 1000 to 18000 Hz.
5 12 dB/oct. or higher slope high-pass filter.

Driver 2“, 110W, 107.5dB, 0.5-18kHz, 4.1kg