Altec Lansing DTS-640 - Manual

L A N S I N G
a Mark IV company DTS-640
Duplex® Loudspeaker
System
• High output capability
• Excellent directivity control
• Enclosure allows refinishing
• Three-way all-horn-loaded
system
• Full triamp or biamp with internal
passive crossover
Description
The Alice Lansing DTS-640 is a three-way,
all-hom-loaded, factory-assembled system
with a coaxial mid/high section. The sys­
tem can be configured as a iriamp system or
as a biamp system using the internal mid/
high passive crossover.*' This compact sys­
tem features high sensitivity, high output ca­
pability and poini-.source alignment, together
with excellent directivity control down to 800
Hz. The coverage at 1,000 Hz is 80° hori­
zontal by 75° vertical, and the system’s nomi­
nal coverage is 60° horizontal by 40° verti­
cal. The horn-loaded bass section extends the
low-frequency response to below 60 Hz, or
lower if multiple units are used. The DTS-640
consists of two 381-mm (15-inch) high-
power, low-frequency drivers with a coaxial
mid-/high-frequency section consi.sting of a
high-efficiency 254-mm (10-inch) midrange
driver together with a 25.4 mm (I-in.) neody­
mium compression driver. Both drivers uti­
lize 60° X 40° constant-directivity horns.
Electrical connection to each driver is made
by large screw terminals able to accept up to
10-gauge wire, or two parallel. 8-pin female
Neulrik Speakon® connectors. The .system
should be used with the Altec Lansing 2400A
digital loudspeaker proces.sor. The recom­
mended crossover frequencies arc 210 Hz
and 1.6 kHz. The enclosure is constructed
from 19-mm (0.75-in.) thick thoroughly
braced 14-ply birch plywood lined with
sound-absorbent glass wool. A complete
four-point hanging sy.siem is provided for
safe suspension of the DTS-640. The sys­
tem may then be hung as a single unit or as
pan of a cluster. The finish of the enclosure
is textured black paint which can be painted
to complement any interior. The grille is con­
structed from 16-gauge black, powder-
coated steel and is backed with a weather-
resistant foam.
The DTS-640 can be used individually or in
arrays to create compact, high-output and di­
rectivity-controlled systems for use in
churche,s. auditoriums, hotels and civic centers.
Architects’ And Engineers’
Specifications
The loudspeaker system shall be of the three-
way, all-hom-loaded type consisting of one
381-mm (15-in.) high-power woofer to­
gether with a 254-mm (10-in.) Duplex® loud­
speaker with a coaxially mounted 25.4-mm
(1-in.) neodymium compression driver
loaded with a 60° x 40° constant-directivity
horn. The sy.stem shall be capable of being
biamped, (using the internal pa.ssive cross­
over). or triamped'’. The loudspeaker system
shall meet the following performance crite­
ria. Power handling shall be 400 watts of pink
noise with 6-dB crest factor, bandlimited from
60 Hz to 210 Hz, and 350 watts bandlimited
from 210 Hz. to 20 kHz. Frequency response
shall be smooth and unifomily usable from
60 Hz to 20 kHz. Pressure sensitivity shall
be 103 dB SPL when measured at one meter
on axis with one wall of bandlimited pink
noise from 60 Hz to 20 kHz. The enclosure
shall be constructed of 19-mm (0.75-in.).
14-ply birch plywood and shall be heavily
braced and lined with sound-absorbent glass
wool. The enclo.sure shall be finished in a
textured black .paint and a removable black
metal grille shall be provided. The dimensions
of the enclosure shall be 838 mm (32.8-in.)
high by 498 mm (19.6-in.) wide by 498 mm
(19.6-in.) deep. The loudspeaker system
shall weigh 41.8 kg (92.0 lb).
The loudspeaker system shall be the Altec
Lansing DTS-640.
Uniform Limited Warranty Statement
Altec Lansing products are guaranteed against
malfunction due to defects in materials or
workmanship for a specified period, as noted
in the individual product-line staiement(s)
below, or in the individual product data sheet
or owner’s manual, beginning with the date
of original purchase. If such malfunction oc­
curs during the specified period, the product
will be repaired or replaced (at our option)
without charge. The product will be relumed
to the customer prepaid. Exclusions and