Altec Lansing 605B User's Manual
Contents
1. 605B Duplex Loudspeakers COAXIAL MONITOR LOUDSPEAKER ALTEC Duplex Loudspeakers are two way transducers consisting of independent high and low frequency units mounted within one physical frame to provide the quality advantages of a professional two way speaker system in compact form The efficiency power handling capacity and extremely wide response of these units make them an ideal choice for both single source high level and distributed low level sound systems The 605B provides minimal distortion wide range smooth response and excellent distribution characteristics to assure perfect audio reproduction of speech and music for all PA sound reinforcement or background music installations and for high quality monitoring of broadcast and recording material Each 605B Duplex Loudspeaker is supplied with a professional type full section dividing network incorporating a high frequency balance control for correctly matching or adjusting to the acoustical characteristics of individual listening areas The 605B Duplex one of the finest 15 inch full range loudspeakers in use throughout the audio industry has for years been the accepted standard monitor loudspeaker of major broadcast and recording studios The 605B covers the audio range from 20 to 20 000 Hz The exceptional uniformity of response is due in part to the large edge wound voice coils aluminum in the high frequency section and copper in the low2. dspeaker Impedance 16 ohms Terminals Binding Post 4 Cone Resonance 25 Hz Diameter 15 5 16 inches Voice Coil Diameters LF 3 inches Mounting Data Baffle Opening 13 5 8 HF 1 inches inches Binsienntel Mtg Bolt Cntrs 8 holes orizonta La R EH noes o equally spaced on 14 pistributon 9 16 diameter circle Vertical Distribution 40 Depth 10 inches Magnet Type Alnico V Weight 28 pounds with network ARCHITECT S AND ENGINEER S SPECIFICATIONS 605B The loudspeaker shall be 15 5 16 inches in diameter and of the 2 way Duplex type having a c n tinuous power rating of 35 watts and a peak power rating of 50 watts The loudspeaker shall be capable of reproducing a frequency range from 20 to 20 000 Hz and from 35 watts shall have a minimum pressure sensitivity of 112 4 dB SPL at 4 feet measured on axis The loudspeaker shall employ a full section dividing network having a 1 600 Hz crossover frequency and a continuously adjustable range of high frequency attenuation from O to 10 dB The loudspeaker shall have a nominal impedance of 16 ohms The low frequency cone shall have a free air resonance frequency of 25 Hz the LF voice coil shall be 3 inches in diameter edge wound with copper ribbon and shall operate in a magnetic gap having a flux density of 11 000 Gauss derived from an Alnico V magnet having a weight of at least 2 25 pounds The outer edge rim of the LF cone shall utilize a high compliance mechanically damped cl
3. frequency section operating in magnetic gaps of high flux density produced by independent oversize Alnico V magnets The large 2 4 aluminum high frequency diaphragm has tangential compliance and is coupled to a heavy high impact compression molded multicellular horn It provides outstanding sound distribution and clarity of the higher musical harmonics without annoying resonant peaks or hollows which produce undesirable sound cancellation A combination of phasing plug and pole piece precision machined with two acoustically exponential annular slots assures correct phase relationship between the center and outer edge of the HF diaphragm The high compliance low frequency cone driven by the large 3 copper voice coil reproduces the lowest fundamental bass tones without frequency doubl ing of bottoming even at full rated power 1515 S Manchester Ave Anaheim Calif 92803 A DIVISION OF ALTEC CORPORATION ALTEC 605B DESCRIPTION Power Frequency Response Pressure Sensitivity SPECIFICATIONS MODEL 605B 35 watts 50 watts peak 20 20 000 Hz 97 dB SPL at 4 ft from 1 watt equal to EIA rating of 50 dB at 30 from 1 mw or 112 4 dB SPL at 4 ft from 35 watts Weight Structure Weight Flux Crossover Network LF 2 25 pounds HF 0 531 pound LF 15 13 pounds HF 5 pounds LF 11 000 Gauss HF 14 000 Gauss 1 600 Hz full section fur nished with lou
4. oth surround which com plemented by the correct apex suspension spider shall be capable of reproducing the stated low frequency response The high frequency diaphragm shall be of aluminum having tangential compliance and shall be properly loaded acoustically by a multicellular horn compression molded of heavy high impact plastic The frequency distribution pattern of the loudspeaker owing to the use of this multi cellular horn shall be 90 by 40 The HF voice coil shall be 1 in diameter edge wound with aluminum ribbon and shall operate in a magnetic gap having a flux density of 14 000 Gauss derived from an Alnico V magnet having a weight of at least 0 531 pounds High frequency dia phragms having annular compliances and or utilizing horns with spherical radiation patterns shall be unacceptable under this specification The loudspeaker frame shall be of heavy cast construction The high frequency diaphragm and voice coil assembly shall be field replaceable without the use of special tools or skills this shall be interpreted to mean that the loudspeaker shall incorporate self centering dowels to insure proper spacing and alignment of the diaphragm and voice coil assembly The loudspeaker shall be Altec Model 605B i S A CP x 3 EIR GOAN TSA CPCI SR Specifications and components subject to change without Beas notice Overall performance will be maintained or improved
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