User manual ALTEC LANSING 288C HF DRIVER

[. . . ] This Duplex® loudspeaker features a 15 in. (381 mm), low frequency cone and a 1 in. (25 mm), high frequency compression driver. The dual magnet construction allows each driver to be structurally, magnetically, electrically, and mechanically independent of the other. [. . . ] The 604-8L utilizes a dual-section dividing network with dual equalization (mid and high frequency). The division is centered at 1, 500Hz and provides 12dB/octave of attenuation for the low frequencies and 18dB/octave of attenuation for the high frequencies. The low frequency cone driver features a 3. 0 in. (76 mm) diameter, edgewound, copper-ribbon voice-coil and a 5. 6 lbs. (2. 54 kg) ferrite magnet producing a gap flux density of 1. 3 T. The high frequency compression driver features a 1. 75 in. (45 mm) diameter, edge-wound, aluminum- POWER HANDLING 4 75 W continuous; 300 W peak PEAK OUTPUT (1 m) 5 123 dB SPL COVERAGE ANGLES 6 60º (horizontal) x 40º (vertical) DIRECTIVITY FACTOR, Q 6 15. 67 DIRECTIVITY INDEX, DI 6 11. 95 dB TRANSDUCER COMPONENTS LF: 1 x 15 in. , high efficiency, low frequency driver HF: 1 x 1. 0 in. , compression driver and MantarayTM horn IMPEDANCE 7 Nominal: 8. 0 Ohms Minimum: 8. 5 Ohms at 12 kHz CROSSOVER FREQUENCY Passive LF - HF: 1, 500 Hz HARMONIC DISTORTION 8 THD: 1. 25% INPUT CONNECTIONS 2 x 2 position barrier strip with 0. 25 in. blade type terminals FINISH Dark gray enamel REPLACEMENT HF DIAPHRAGM ASSEMBLY 34647 REPLACEMENT LF CONE KIT R-604-8L DIMENSIONS Outside Diameter: 16. 0 in. (15. 4 kg), includes network Shipping: 42. 0 lbs. (19. 1 kg), includes network 604-8L ­ THEILE-SMALL PARAMETERS 6. 4 Ohms Re: 28. 5 Hz fS: 412. 86 liters (14. 58 ft. 3) VAS: 0. 20 QTS: 0. 21 QES: 7. 5 QMS: 314. 6 cm3 (19. 2 in. 3) VD: 0: 4. 3% 3. 8 mm (0. 15 in. ) Xmax: 1000 W. Wilshire Blvd. , Suite 362 · Oklahoma City, Oklahoma 73116 · Phone: 1-405-848-3108 · Fax: 1-405-848-3217 · www. altecpro. com DIVIDING NETWORK INSTALLATION The dividing network is designed to be mounted from the inside of the speaker cabinet to a surface that is at least 0. 75 in. (224 mm) in depth, and shall weigh 34. 0 lbs. (15. 4 kg) (including the dividing network). The Duplex® loudspeaker shall be the Altec Lansing model 604-8L. BEAMWIDTH As we are continually striving to improve Altec Lansing products, specifications are subject to change without notice. Please visit www. altecpro. com for the latest information on Altec Lansing Professional products. SPECIFICATION NOTES 1 The frequency response of the loudspeaker is measured at a distance of no less than 3 meters to obtain full range data. The level is then corrected to be equivalent to a 2. 83 V 1 m measurement. A near field measurement of the loudspeaker is performed for frequencies below 500 Hz. This data is then combined with the full range measurement to give an accurate composite frequency response curve. 2 The limits of the frequency response are referenced to -10 dB of the loudspeaker's rated sensitivity in a 4 ft. 3 vented enclosure. 3 The sensitivity of the loudspeaker is the log based average SPL taken over the intended bandwidth of operation for the loudspeaker with a 2. 83 V swept sine stimulus. The data is measured and level corrected in a manner consistent with note 1. 4 The power handling capacity of the loudspeaker is tested using a full range form of AES Standard 2-1984. [. . . ] 4 The power handling capacity of the loudspeaker is tested using a full range form of AES Standard 2-1984. The test stimulus is band limited (40 Hz ­ 16 kHz) pink noise with a 6 dB crest factor. The applied RMS voltage is determined using the minimum impedance of the loudspeaker. The amplifier used to drive the loudspeaker has a minimum operating headroom of 6 dB referenced to the RMS voltage. [. . . ]