JBL 8340 User's Manual
Contents
1. JBL Professional Series Key Features P Frequency range 45 Hz 18 kHz gt High Sensitivity 96 dB 1 W 1 m gt High Power Handling Capability 150 watts pink noise P Similar size enclosure to the successful 8330 allowing simple installation into existing systems gt In cabinet mounting hardware accepts JBL 2502 wall brackets for fast installation gt D Crossover switchable between ISO2969 cinema surround rolloff and flat response B Uniform horizontal and vertical coverage gt Approved by Lucasfilm Ltd for THX installations The 8340 Cinema Surround Speaker offers high power handling capability high sensitivity and extended bass response in an extremely compact enclosure The two way 8340 incorporates the proven reliability and performance features found in the industry stan dard JBL 8330 Surround Loudspeaker System and is designed to accurately reproduce the extended dynamic range and frequency response charac teristics required by digital sound formats The 8340 incorporates a high power long throw 250 mm 10 in low frequency transducer which extends the frequency response to below 50 Hz The low frequency driver features an SFG Symmetrical Field Geometry magnet structure which lowers second harmonic distor tion to inconsequential levels The high frequency section incorporates a 19 mm in compression driver horn combination capable of very high output power The true constant2. directivity coverage 100 horizontal by 60 vertical combines with a very smooth off axis design in the cross over range to provide the same sound character to all seats High Power Cinema Surround Speaker for Digital Applications Specifications SYSTEM Frequency Range 10 dB 45 Hz 18 kHz Power Rating 150 watts continuous pink noise Sensitivity 96 dB 1 watt 2 83 V at 1 meter 3 3 ft Nominal Impedance 8 ohms Crossover Frequency 2kHz Downward Firing Angle Nominal 15 when mounted flush on back panel High Frequency Contour Switch 2 positions Flat and IS02969 Curve X surround contour Polarity EIA red LOW FREQUENCY LOUDSPEAKER Nominal Diameter 280 mm 10 in Voice Coil Diameter 50 mm 2 in HF DRIVER HORN Nominal Diameter 19 mm in Voice Coil Diameter 25 mm 1 in Characteristics Ferro fluid cooled Coverage Pattern 100 H x 60 V GENERAL Finish Black vinyl Grille Color Dark gray Input Terminations Dual five way binding posts Dimensions 539 mm x 481 mm x 304 mm HxWxD 21 in x 19 in x 12 in System Net Weight 50 Ibs 1 Raring based on test signal of IEC filtered random noise with a peak to average ratio of 6 dB two hours dnration 2 Sensitivity is based on a swept 500 Hz to 2 5 kHz signal for an input of 2 83 V 8 ohms JBL continually engages in research related to product improvement New marerials production methods and design refinements are i
3. ntroduced 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 the original design specifications unless otherwise stated gt 8340 High Power Cinema Surround Speaker for Digital Applications Very high power handling 150 watts continuous with peaks of 600 watts gives the 8340 the extended dynamic range required by digital soundtracks This power head room also provides additional reliability The 8340 incorporates a true IS02969 cinema surround rolloff curve which is switchable to flat response for installations where the speaker is mounted behind any material or curtaining which can block high frequencies The same width and style cabinet as the 8330 allows installation into existing systems In cabinet mounting hardwate accepts Omnimount or wall brackets for fast installation Built to traditional JBL standards of precision the 8340 will continue to deliver exceptional performance year after year without special care or attention JBL JBL Professional 8500 Balboa Boulevard PO Box 2200 Northridge California 91329 U S A SS8340 CRP 5M H A Harman international Company 6 96
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