ALTEC 605B DUPLEX
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 system. 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, fullsection 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 loudspeakers 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 low-frequency section), operating in magnetic gaps of high flux
density, produced by independent oversize Alnico V magnets. The large 2¼''
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 doubling of
'bottoming' - even at full rated power.
Specifications
Power: 35 watts (50
watts, peak)
Frequency Response:
20 – 20,000 hZ
Pressure
Sensitivity: 97 dB SPL at 4 ft from watt (equal to EIA rating of 50dB at 30'
from 1 mw or 112,4 dB 30' from 1 mw) or 112,4 dB SPL at 4 ft from 35 watts
Impedance: 16 ohms
Cone Resonance: 25
Hz
Voice Coil
Diameters: LF : 3 inches, HF : 1¾ inches
Horizontal
Distribution: 90°
Vertical
Distribution: 40°
Magnet Type: Alnico
V
Weight: LF : 2,25
pounds
HF : 0,531 pound
Structure Weight: LF
: 15.13 pounds
HF : 5 pounds
Flux: LF : 11,000
Gauss
HF : 14,000 Gauss
Crossover Network:
1,600 Hz full-section (furnished with loudspeaker)
Terminals: Binding
Post (4)
Diameter: 15-5/16
inches
Mounting Data:
Baffle Opening 13-5/8inchs, Mtg. Bolt. Cntrs.: 8 holes equally
spaced on 14-9/16
diameter circle
Depth: 19 inches
Weight: 28 pounds
