User manual ALTEC LANSING 288C HF DRIVER

[. . . ] Today's marketplace boasts many "digital-ready" loudspeaker systems. Most manufacturers suggest that only their newest models can manage the dynamics presented through the digital medium. Nothing could be further from the truth with Altec Lansing's 604. Whether a vintage model, or our newest model, the 604-8L, the digital medium only improves the performance of the 604. [. . . ] The Altec Lansing 604-8L includes a two-way loudspeaker and a dividing network. 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. (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. (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. (127 mm) high cutout is required on one of the speaker cabinet's walls. 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. 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. [. . . ] 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. 5 The peak output level of the loudspeaker is calculated based on the sensitivity and the peak power handling capabilities of the loudspeaker. 6 The coverage angles for the loudspeaker are taken as the -6 dB points of the directivity response and averaged from 500 Hz ­ 16 kHz. [. . . ]