Altec Lansing 605B - Manual (Page 2)

Aim 605В
DESCRIPTION
Power;
Frequency Response:
Pressure Sensitivity:
MODEL 605B
SPECIFICATIONS
Weight:
Impedance:
Cone Resonance:
Voice Coil Diameters:
Horizontal
Distribution:
Vertical Distribution;
Magnet Type:
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
16 ohms
25 Hz
LF: 3 inches
HF: 1% inches
90°
40°
Alnico V
Structure Weight:
Flux:
Crossover Network:
Terminals:
Diameter;
Mounting Data;
LF
HF
LF
HF
LF
HF
2.25 pounds
0.531 pound
15.13 pounds
5 pounds
11.000 Gauss
14.000 Gauss
Weight:
1,600 Hz full-section (fur­
nished with loudspeaker)
Binding Post (4)
15-5/16 inches
Baffle Opening: 13-5/8
inches
Mtg. Bolt. Cntrs; 8 holes
equally spaced on 14-
9/16" diameter circle
Depth: 10 inches
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 con­
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 0 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, cloth-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.
%
LITHO IN U.S.A. CP-673-5K
Specifications and components subject to change toithout
notice. Overall performance will be maintained or improved.
AL-1413-1