These are very nice shape, nearly perfect. They are very close serial numbers 32592 and 32593. They have the same DC Resistance measurements of 6.1 ohms.Sound reinforcement applicationsdemand loudspeakers with highacoustic output and controlled dispersion.The JBL Model 2402H ultra-highfrequency transducer is engineered tomeet these demands, providing tightpattern control, deep penetration,and extremely high on-axis sensitivity.The high end of the audio spectrum is reproduced with incredible clarity and crispness – all the realism a performer could desire.Frequency response extendssmoothly from 2.5 kHz to 15 kHz.A circular exponential horn assemblyprovides a dispersion pattern that is40° conical at 10 kHz. For a givenpower input, the 2402H producesan exceptionally high acoustic output,converting a 10 W input into a soundpressure level of 100 dB at a distanceof 10 m (33 ft). Such efficiency allowsthe 2402H to re-create intense highfrequency onsets and transients withoutstanding clarity and accuracy.The 2402H utilizes an anisotropicstrontium ferrite magnet, manufacturedusing a wet-pressed formingprocess. The benefits of this technologyare better temperature stability,resistance to demagnetization, reductionin weight over typical ferritematerial, and the highest performanceon an actual production basis. A fluxdensity of 1.75 T (17,500 gauss) inthe voice coil gap is realized.The circular exponential horn assembly is die cast ofsolid aluminum. Internally, the annular diaphragm ispneumatically formed of fatigue-resistant aluminum alloy.Wire used in the 44 mm (1¾ in) voice coil is aluminum,milled to a thin ribbon. This process places a maximumamount of conductor in the magnetic gap for optimumefficiency and transient response.The use of high-temperature voice-coil former materialsand adhesives has improved the power handling and ruggednessof the Mouth Diameter: 79 mm (3⅛ in)
Nominal Impedance: 8 V
Minimum Impedance: 8 V at 2.5 kHz
DC Resistance: 6.25 V ± 10% @ 25°C
Power Capacity : 40 W continuous program
Sensitivity : 110 dB, 1 W, 1 M (3.3 ft)
Frequency Response (±3 dB): 3 kHz to 15 kHz
Frequency Range (–10 dB): 2.5 kHz to 15 kHz
Dispersion: 40° conical at 10 kHz
Recommended Crossover: 2.5 kHz or higher
Diaphragm: 0.056 mm (0.0022 in) aluminum alloy
Voice Coil Diameter: 44 mm (1¾ in)
Voice Coil Material: Aluminum ribbon
Magnetic Assembly Weight: 1.9 kg (4⅛ lb)
Flux Density: 1.75 T (17,500 gauss)
Baffle Cutout Diameter: 79 mm (3⅛ in)
Dimensions: 121 mm diameter (4¾ in)98 mm depth (3⅞ in).
