601-8D DUPLEX
SOUND PRODUCTS DIVISION
LOUDSPEAKER SYSTEM
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DESCRIPTION
The ALTEC 601-8D Duplex Loudspeaker System
is a two-way loudspeaker with high- and lowfrequency speakers coaxially mounted in a
single frame. The dual magnet structures allow
each speaker to be magnetically, electrically
and mechanically independent. Coaxial driver
arrangement also provides the effect of an inte
grated source of full-range sound. All frequen
cies are propagated through a common
'window' to ensure good stereo imagery when
multiple 601-8D's are used.
The high-frequency section has a voice coil of
edge-wound aluminum ribbon attached to an
aluminum diaphragm and loaded with a sturdy
exponentially expanded multicellular horn. The
low-frequency cone is driven by a voice coil of
edge-wound aluminum ribbon, and is sup
ported by a high-compliance cloth surround.
The 601-8D is a fine loudspeaker for general-
purpose sound reproduction applications. It is
designed to operate in enclosures as small as
2.5 cubic feet, and its relatively small physical
size permits excellent wide-range performance
in environments which would otherwise utilize
lower quality, single-driver speakers.
SPECIFICATIONS
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Type:
Power Rating:
Frequency Response:
Pressure Sensitivity:
Impedance:
Nominal Free-Air LF
Cone Resonance:
Distribution Pattern:
Voice Coils —
LF:
HF:
Magnets-
LF:
HF:
Duplex coaxial loudspeaker
system with dividing network
40 watts of continuous pink
noise (20-20,000 Hz)
30 to 20,000 Hz in
appropriate enclosure
99 dB SPL at 4' measured on
axis with 1 watt input of pink
noise band-limited from 500
to 3000 Hz with speaker
mounted in 614D enclosure
8 ohms
39 Hz
40°Vx90°H
3" diameter, edge-wound
aluminum ribbon
diameter, edge-wound
aluminum ribbon
Alnico, 1.8 pounds,
10,400 gauss flux density
Alnico, 0.188 pound,
10,000 gauss flux density
Frame:
Dividing Network
(furnished):
Dimensions:
Finish:
Mounting Data —
Baffle Opening:
Mounting Bolt
Centers:
Recommended
Enclosure:
Shipping Weight:
Actual Weight:
Structurally reinforced
die-cast aluminum
Dual full section with 3000
Hz crossover frequency, 12
dB/octave slope and
continuously variable HF
shelving control with 10 dB
range
12ys" (30.8 cm) diameter
(14.3 cm) deep
Gray enamel
11 >/8" (28.3 cm)
(front or rear mount)
8 or 4 bolts equally spaced
on 11%" (29.4 cm) diameter
circle
ALTEC 614D Speaker Cabinet
18 pounds (8.2 kg)
15 pounds (6.8 kg)
(includes dividing network)
ARCHITECT'S AND ENGINEER'S SPECIFICATIONS
The loudspeaker system shall be a two-way coaxial,
with a separate magnet structure for each section and
a dual full-section dividing network. The HF section
shall have an aluminum diaphragm and shall be
loaded with an exponentially expanded multicellular
horn. The loudspeaker system shall meet the follow
ing criteria. Power rating, 40 watts of continuous
pink noise band-limited from 20-20,000 Hz. Fre
quency response, 30-20,000 Hz. Pressure sensitivity,
99 dB SPL at 4' when measured on axis in enclosure
with 1 watt input of pink noise band-limited from
500-3000 Hz. Impedance, 8 ohms. Nominal free-air
LITHO IN U.S.A. 875-5K
LF cone resonance, 39 Hz. Distribution pattern,
40°V X 90°H. Crossover frequency, 3000 Hz with
12 dB/octave slope. Voice coils; 3" diameter of edgewound aluminum ribbon (LF), 3/4" diameter of edgewound aluminum ribbon (HF). Magnets; Alnico, 1.8
pounds (LF), 0.188 pound (HF). Flux density, 10,400
gauss (LF), 10,000 gauss (HF). Dimensions, 12V8"
diameter x 5%" deep. Weight, 15 pounds.
The loudspeaker system shall be the ALTEC Model
601-8D.
ALITEIC
SOUND PRODUCTS DIVISION
1515 SOUTH MANCHESTER AVENUE, ANAHEIM, CALIFORNIA 92803
AL-1412-12