Altec Lansing DTS-640 User Manual
LANSING
a Mark IV company
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, powdercoated steel and is backed with a weatherresistant 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 threeway, 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
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
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
Altec Lansing DTS-(540 Duplex® Loudspeaker System
Limitations: The Limited Warranty does not
apply to: (a) exterior finish or appearance;
(b) certain specific items described in the in
dividual product-line statement(s) below, or
in the individual product data sheet or
E
owner’s manual; (c) malfunction resulting
from use or operation of the product other
than as specified in the product data sheet or
owner's manual; (d) malfunction resulting
a;
d
from misuse or abuse of the product; or (e)
•o
3
malfunction occurring at any time after re
o
pairs have been made to the product by any
X
one other than Mark IV Audio Service or
3d
a
3
any of its authorized service representatives.
Q
Obtaining Warranty Service: To obtain
warranty .service, a customer must deliver the
product, prepaid, to Mark IV Audio Service
g
or any of its authorized service representa
M
c
tives together with proof of purchase of the
product in the form of a bill of sale or re
ceipted invoice. A list of authorized service
•w
repre.sentatives is available from Mark IV
<
Audio Service at 10.500 W. Reno Avenue,
Oklahoma, OK 73127 (800/845-8727 or
FAX 405/577-3274). Incidental and Con
sequential Damages Excluded: Product re
pair or replacement and return to the cus
tomer are the only remedies provided to the
customer. Altec Lansing shall not be liable
for any incidental or consequential damages
including, without limitation, injury to per
sons or property or loss of use. Some states
do not allow the exclusion or limitation of
incidental or consequential damages so the
above limitation or exclusion may not apply
to you. Other Rights: This warranty gives
you specific legal rights, and you may akso
have other rights which vary from state to
state.
Altec Lansing Speakers and Speaker Sys
tems are guaranteed against malfunction due
to defects in materials or workmanship for a
period of five (5) years from the date of origi
nal purchase. The Limited Warranty does not
apply to burned voice coils or malfunctions
such as cone and/or coil damage resulting
from improperly designed enclosures. Altec
Lansing active electronics associated with
the speaker systems are guaranteed for three
(3) years from the date of original purchase.
Additional details are included in the Uni
form Limited Warranty statement.
Altec Lansing Accessories are guaranteed
against malfunction due to defects in mate
rials or workmanship for a period of one (1)
year from the date of original purchase. Ad
ditional details are included in the Uniform
Limited Warranty statement.
For technical assistance, contact Technical Sup
port at 800/234-6831 or616/695-6831,M-F.8;00
a.m. to 5;(X) p.m. eastern standard time.
Specifications subject to change without
notice.
Figure 1—DTS-640 Polar Response
(one-third-octave bands of pink noise)
270”
270'
270'
3oo;
240'
------------
300;
270'
240'
270'
Horizontal*
Vertical*
Long enclosure axis vertical
180°
630 Hz
240'
240'
IftO'
1 kHz
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