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Фрагмент инструкции
Such conditions are readily fulfilled with unusually high efficiency and exceptionally uniform response from 500 or 800 Hz (dependent on the dividing network and horn employed) to over 20,000 Hz. When used in conjunction with the ALTEC 511 A, 511B (500 Hz) or 811B (800 Hz) sectoral horn, the N501-8A (500 Hz) or N801-8A (800 Hz) network, and the 414, 515 or 416-8A low-frequency loudspeaker, the 807-8A and 808-8A furnish the realistic reproduction demanded by all major broadcasting stations, recording studios, theatres, auditoriums and music halls. Both the 807-8A and 808-8A transducers utilize a voice coil of notably large diameter (1-3/4"), edge wound with aluminum ribbon and coupled to a large diaphragm. A mechanical phasing plug (i.e., pole piece), having two exponential acoustic slots, is utilized to provide the proper phase relationship between the sound emanating from the center and outer edges of the diaphragm and voice coil assembly, thus ensuring maximum high-frequency reproduction while maintaining a smooth overall response. Either driver is capable of uniform, peak-free reproduction to a point far above the range of human hearing. The entire diaphragm and voice coil assembly of the 807-8A and 808-8A is field replaceable; no special tools are required. For full range systems utilizing low-frequency loudspeakers of relatively low efficiency, located in non-reverberant areas having moderate ambient noise levels, the 807-8A driver proves a perfect match. (Such conditions would be analagous to the average listening room or smaller broadcast and recording studio.) In instances wherein relatively high ambient noise is present, and where maximum efficiency of both vocal speech and music must be reproduced with great clarity, the heavier magnet weight and greater flux density of the 808-8A are preferred. The 808-8A represents one of the finest high-frequency transducers manufactured by ALTEC; the 2 dB greater efficiency (over the 807-8A), coupled with the same precision accuracy of minute production tolerances, make the 808-8A the industry standard for laboratory and professional usage alike. These factors, together with the all-important ALTEC criteria of engineering experience, combine to produce the 807-8A and 808-8A high-frequency loudspeakers of virtually matchless quality and limitless application. A quality company of L TV Ling Altec, Inc. 1515 S. Manchester Ave., Anaheim, Calif. 92803 New York 807-8A 808-8A ALTEC 807-8A 808-8A * DESCRIPTION Power Rating: Frequency Response: Pressure Sensitivity: Impedance: Voice Coil Diameter: Application: Protection: Magnet Weight Flux Density: Dimensions: Finish: Accessories: SPECIFICATIONS MODEL 807-8A Up to 30 watts rms (based on continuous operation with white noise 500 Hz to 20,000 Hz and with ALTEC model N501-8A or N801-8A dividing network) 500 to 20,000 Hz 109.5 dB w/1 watt input measured 4' from mouth of 30" horn over warble frequency range 500-2500 Hz (Ref: 0.0002 dynes/cm2 for 1 watt input) 124.2 dB at 30 watts 8 ohms 1.75" HF Driver loudspeaker for wide-range, 2-way studio 'Playback' systems N501-8A dividing network and 511A or 511B horn for 500-Hz crossover; N801-8A dividing network and 811B fiorn for 800-Hz crossover. 13 oz 13,000 Gauss 4-1/2" Diameter 3-1/4" Deep 5 lbs, 11 oz Black matte MODEL 808-8A Up to 30 watts rms (based on continuous operation with white noise 500 Hz to 20,000 Hz and with ALTEC model N501-8A or N801 <8A dividing network) 500 to 20,000 Hz 111.7 dB w/1 watt input measured 4' from mouth of 30" horn over warble frequency range 500-2500 Hz (Ref: 0.0002 dynes/cm2 for 1 watt input) 126.4 dB at 30 watts 8 ohms 1.75" HF Driver loudspeaker for wide-range, 2-way studio 'Playback' systems N501-8A dividing network and 511A or 511B horn for 500-Hz crossover; N8014JA dividing network and 811B horn for 800-Hz crossover. 1.2 lbs 15,250 Gauss 4-1/2" Diameter 3-11/16" Deep 511A, 511B, 811B sectoral horns*; N501-8A, N801-8A dividing networks; 70.7V transformers. *For multicellular horns, use ALTEC driver loudspeaker models 730, 288,290 or 291. Black matte 511A,- 511B, 811B sectoral horns* N801-8A dividing networks; 70.7V transformers. N501-8A, ARCHITECTS AND ENGINEERS SPECIFICATIONS (FOR ALTEC 807-8A) The high-frequency driver loudspeaker shall utilize a diaphragm coupled to a voice coil that shall be edge-wound of aluminum ribbon and that shall be 1-3/4" in diameter...
Эта инструкция также подходит к моделям:Акустика - 808-8A (809.16 kb)