Altec Lansing 902-8T User's Manual
Contents
1. ALTEC 902 8A 902 16A 902 8T COMPRESSION DRIVER a OUDSPEAKERS PRELIMINARY SPECIFICATIONS Power Capacity 10 watts continuous pink noise from 1200 Hz to 20 kHz 902 8A 902 16A or from 500 Hz to 20 kHz 902 8T Measurements made on Altec 511B horn Frequency Response 902 8A 902 16A 1200 Hz to 20 kHz 902 8T 500 Hz to 20 kHz 104 dB SPL measured 4 from mouth of Altec 511B horn with 1 watt input of pink noise band limited from 1200 Hz 5000 Hz 8 ohms 902 8A 902 8T 16 ohms 902 16A Pressure Sensitivity Minimum Impedance Construction DESCRIPTION Magnet Ferrite 40 ounces The Altec 902 8A 902 16A and 902 8T High Frequency Flux Density 18 000 gauss Driver Loudspeakers are designed for professional sound Magnetic applications requiring outstanding production of sound Structure Weight 5 Ibs 2 61 kg over a wide frequency range at substantial power levels zi oe sie s Diaphragm Aluminum tangential Such conditions are fulfilled with high efficiency and uni j form response from 1200 Hz 902 8A 902 16A or 500 Voice Coil Eeigaranmei ahamia Hz 902 8T to 20 000 Hz Dimensions 5 13 97 cm diameter 2 6 67 cm deep less These drivers furnish the realistic sound production mounting studs demanded by theatres and music halls portable concert Weight 6 Ibs 6 oz 2 90 kg sound systems and2. 8A 902 16A and from 500 to 20 kHz 902 8T measured on Altec 511B horn Frequency response uniform from 1200 Hz to 20 kHz 902 8A 902 16A and from 500 Hz to 20 kHz 902 8T Pressure sensi tivity 104 dB SPL measured at 4 from mouth of Altec 511B horn with 1 watt input of pink noise band limited from 1200 Hz to 5 kHz The voice coil shall be of edgewound aluminum ribbon and shail operate in a magnetic gap having a flux density of 18 000 gauss derived from a 40 ounce Ferrite V magnet The dia phragm shall be an aluminum tangential A Tangerine phasing plug with 13 radial acoustic slots shall be utilized to provide the proper phase relationship be tween the sound emanating from the center and edges of the diaphragm and voice coil assembly The entire dia phragm and voice coil assembly shall be field replace able without requiring special tools or skills The driver shall be 5 in diameter by 2 deep excluding 1 depth of mounting studs and shall weigh 6 pounds 6 ounces Bottom 1 00 2 54cm 2 60 6 60cm J4 4 00 10 16 cm 902 8A Driver The driver shall have a minimum impedance of 8 ohms and shall operate at a crossover frequency of 1200 Hz or higher The compression driver loudspeaker shall be the Altec Model 902 8A 902 16A Driver The driver shall have a minimum impedance of 16 ohms and shall operate at a crossover frequency of 1200 Hz or higher The compression driver loudspe
3. playback systems when used in con junction with Altec 511B 500 Hz 811B 800 Hz or Finish Gray Hammertone enamel MR931 12 1200 Hz horns appropriate Altec dividing with black rubber boot networks and Altec professional low frequency Mounting Data Two 4 24 x 1 studs 180 loudspeakers apart on 1 2 centers Each 902 type driver uses a voice coil of 134 inch dia meter edge wound with aluminum ribbon and coupled to an aluminum tangential diaphragm The entire diaphragm and voice coil assembly is field replaceable no special tools are required The 902 8A 8 ohms and the 902 16A 16 ohms are designed to operate at a crossover fre quency of 1200 Hz The 902 8T 8 ohms is fitted with a loading cap to operate at crossover frequencies down to 500 Hz Altec s new Tangerine radial phase plug refines the technology of proper phasing ensuring maximum high frequency reproduction while maintaining smooth overall response The drivers are capable of uniform peak free reproduction throughout the range of human hearing Reg U S Patent No 4 050 541 Foreign patents pending N LITHO IN U S A 5 50 Z cm N Top 2 69 6 83 cm 1 00 2 54 cm ARCHITECT S AND ENGINEER S SPECIFICATIONS The compression driver loudspeaker shall meet the fol lowing criteria Power capacity 10 watts continuous pink noise band limited from 1200 Hz to 20 kHz 902
4. aker shall be the Altec Model 902 16A 902 8T Driver The driver shall have a minimum impedance of 8 ohms and shall be equipped with a loading cap for operation at a crossover frequency of 500 Hz or higher The compression driver loudspeaker shall be the Altec Model 902 8T ALTEC 1515 SOUTH MANCHESTER AVENUE ANAHEIM CALIFORNIA 92803 ALTEC CORPORATION 880 5M AL 2402 1 9
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