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JBL 2450J - Professional Compression Driver WITH HORN and Diaphragm Included
Estimated price for orientation: 1 000 $
Category: Speaker Drivers and Horns
Class:
Description Condition: New other (see details): A new, unused item with absolutely no signs of wear. The item may be missing the original packaging, or in the original packaging but not sealed. The item may be a factory second or a new, unused item with defects. See the seller’s listing for full details and description of any imperfections. See all condition definitions- opens in a new window or tab ... Read moreabout the condition Brand: JBL Model: 2450J Suited For: Mid-Range & Tweeter Frequencies Country/Region of Manufacture: United States Type: Horn/Compression Driver
If you're looking at this then you're probably familiar with this driver. Otherwise, see below for a description.Excellent condition and fully-working JBL 2450J (J Designation means 16 Ohm version). Assembled and ready for use. This is a professional, high-quality, high-SPL midrange/tweeter with capabilities of approximately 150 db SPL! (See JBL graphs for further info). It is a bit dusty, because it has sat in storage for virtually all of it's life. It was a spare driver that was never needed. It has been tested and functions perfectly.. Truly immense sensitivity and clarity.From JBL's architectural specifications:The compression driver shall consist of a neodymium magnetic structure with all magnetic assembly parts machined from cast or extruded billet stock. The phasing plug shall be assembled of concentric horns of equal path length to eliminate phase cancellations, and it shall be coupled to a tapered throat. The diaphragm shall be 0.05 mm (0.002 in) pure titanium pneumatically drawn to shape and embossed with radial reinforcing ribs to increase rigidity. High frequency response shall be controlled through the use of a threedimensional suspension structure. The voice coil shall be edgewound aluminum ribbon of not less than 100 mm (4 in) in diameter, operating in a magnetic field of not less than 1.9 tesla (19,000 gauss). Performance specifications of a typical production unit shall be as follows: Measured sensitivity with a 1 mW input on a 25 mm (1 in) terminated tube, averaged from 500 Hz to 2.5 kHz, shall be at least 118 dB SPL. Measured sensitivity with a 1 W input at 1 m distance on axis from the mouth of a horn with a Q of 6.3 averaged in the 2 kHz octave band shall be at least 111 dB SPL. As an indication of electromechanical conversion efficiency, the B1 factor shall be at least 18 newtons per ampere. Frequency response, measured on a terminated tube, shall be flat within ± 1 dB from 500 Hz to 3.3 kHz, with 6 dB / octave rolloff above that point. Nominal impedance shall be 8 (16) ohms and power capacity shall be at least 100 watts normal speech or music program material.From JBL's technical specifications:Throat Diameter: 49 mm (2 in)Nominal Impedance: 2450H 8 ohms 2450J 16 ohmsMinimum Impedance: 6 ohms (H), 12 ohms (J) @ kHz 5DC Resistance: 4.3 ohms (H), 8.5 ohms (J) ± 10% @ 25%Power Capacity¹: 100 W continuous program above 500 Hz150 W continuous program above 1 kHzSensitivity: 111 dB SPL, 1 W @ 1 m on-axis on horn²118 dB SPL, 1 mW on plane-wave tube³Nominal Efficiency: 30% (500 Hz to 2.5 kHz)Frequency Range: 500 Hz to 20 kHzRecommended Crossover: 500 Hz or higher, 12 dB/octave minimumDiaphragm: 0.05 mm (0.002 in) pure titaniumVoice Coil Diameter: 100 mm (4 in)Voice Coil Material: Edgewound aluminum ribbonFlux Density: 1.9 T (19,000 gauss)B1 Factor: 12.7 (H) N/A 18 (J) N/APositive voltage to black terminal gives diaphragm motion toward the phasing plugDimensions: 167 mm (6 in) diameter 139 mm (5 in) depthMounting: Four ¼-20 threaded holes, 90° apart on 101.6 mm (4 in) diameter*Dimensions of the horn currently bolted to the driver: approx. 11" x 7.75"Item will be shipped carefully with insurance and tracking via FedEx. International buyers please contact me (most likely I'll use USPS for international shipments) before purchasing.
Description
| Condition: | New other (see details): A new, unused item with absolutely no signs of wear. The item may be missing the original packaging, or in the original packaging but not sealed. The item may be a factory second or a new, unused item with defects. See the seller’s listing for full details and description of any imperfections. See all condition definitions- opens in a new window or tab ... Read moreabout the condition | Brand: | JBL |
| Model: | 2450J | Suited For: | Mid-Range & Tweeter Frequencies |
| Country/Region of Manufacture: | United States | Type: | Horn/Compression Driver |
If you're looking at this then you're probably familiar with this driver. Otherwise, see below for a description.Excellent condition and fully-working JBL 2450J (J Designation means 16 Ohm version). Assembled and ready for use. This is a professional, high-quality, high-SPL midrange/tweeter with capabilities of approximately 150 db SPL! (See JBL graphs for further info). It is a bit dusty, because it has sat in storage for virtually all of it's life. It was a spare driver that was never needed. It has been tested and functions perfectly.. Truly immense sensitivity and clarity.From JBL's architectural specifications:The compression driver shall consist of a neodymium magnetic structure with all magnetic assembly parts machined from cast or extruded billet stock. The phasing plug shall be assembled of concentric horns of equal path length to eliminate phase cancellations, and it shall be coupled to a tapered throat. The diaphragm shall be 0.05 mm (0.002 in) pure titanium pneumatically drawn to shape and embossed with radial reinforcing ribs to increase rigidity. High frequency response shall be controlled through the use of a threedimensional suspension structure. The voice coil shall be edgewound aluminum ribbon of not less than 100 mm (4 in) in diameter, operating in a magnetic field of not less than 1.9 tesla (19,000 gauss). Performance specifications of a typical production unit shall be as follows: Measured sensitivity with a 1 mW input on a 25 mm (1 in) terminated tube, averaged from 500 Hz to 2.5 kHz, shall be at least 118 dB SPL. Measured sensitivity with a 1 W input at 1 m distance on axis from the mouth of a horn with a Q of 6.3 averaged in the 2 kHz octave band shall be at least 111 dB SPL. As an indication of electromechanical conversion efficiency, the B1 factor shall be at least 18 newtons per ampere. Frequency response, measured on a terminated tube, shall be flat within ± 1 dB from 500 Hz to 3.3 kHz, with 6 dB / octave rolloff above that point. Nominal impedance shall be 8 (16) ohms and power capacity shall be at least 100 watts normal speech or music program material.From JBL's technical specifications:Throat Diameter: 49 mm (2 in)Nominal Impedance: 2450H 8 ohms 2450J 16 ohmsMinimum Impedance: 6 ohms (H), 12 ohms (J) @ kHz 5DC Resistance: 4.3 ohms (H), 8.5 ohms (J) ± 10% @ 25%Power Capacity¹: 100 W continuous program above 500 Hz150 W continuous program above 1 kHzSensitivity: 111 dB SPL, 1 W @ 1 m on-axis on horn²118 dB SPL, 1 mW on plane-wave tube³Nominal Efficiency: 30% (500 Hz to 2.5 kHz)Frequency Range: 500 Hz to 20 kHzRecommended Crossover: 500 Hz or higher, 12 dB/octave minimumDiaphragm: 0.05 mm (0.002 in) pure titaniumVoice Coil Diameter: 100 mm (4 in)Voice Coil Material: Edgewound aluminum ribbonFlux Density: 1.9 T (19,000 gauss)B1 Factor: 12.7 (H) N/A 18 (J) N/APositive voltage to black terminal gives diaphragm motion toward the phasing plugDimensions: 167 mm (6 in) diameter 139 mm (5 in) depthMounting: Four ¼-20 threaded holes, 90° apart on 101.6 mm (4 in) diameter*Dimensions of the horn currently bolted to the driver: approx. 11" x 7.75"Item will be shipped carefully with insurance and tracking via FedEx. International buyers please contact me (most likely I'll use USPS for international shipments) before purchasing.