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407 Series 6.5-Inch Duplex Full-Range High Performance Ceiling Loudspeakers
accommodate the use of any standard back
enclosure with a diameter of 6.8-inches or
greater and a depth of at least 4.5 inches.
Larger back volumes will increase the low-
frequency output. The frequency response of
a 407-8A in a typical 0.5-cubic-foot back en-
closure is shown in Figure 1.
Mounting
The 407-8A may be front or rear mounted
against either surface of its mounting flange
and requires a 145-mm (5.70-in.) diameter
cutout and a 154-mm (6.08-in.) bolt circle,
as shown in Figure 7. Normal fasteners up
to 5 mm (0.20 in.) will fit through the four
holes in the frame. The 407-8A is designed
for mounting on standard ceiling speaker
baffles.
Architects' and Engineers'
Specifications
The loudspeaker shall be a ceiling loud-
speaker with a nominal diameter of 167 mm
(6.6 in.), an overall depth of 62 mm (2.45 in.)
for the 407-8A, and 119 mm (4.70 in.) for
the 407-8T and 407-16T, and shall weigh no
more than 1.0 kg (2.2 lb) for the 407-8A, 1.5 kg
(3.3 lb) for the 407-8T and 407-16T. The
voice coil shall have a nominal diameter of
25.4 mm (1.0 in.) and length of 7.6 mm (0.3 in.)
and shall operate in a gap of not less than 1.0 T
(10,000 Gauss). The loudspeaker shall exhibit
a sensitivity (SPL, 1 watt at 1 meter (3.28 ft),
averaged 200-4,000 Hz) of no less than
93 dB on axis maintaining an essentially flat
frequency response with 3-dB-down points at
95 and 18,000 Hz in a one-cubic-foot sealed
box in a free field. The half-space reference
efficiency shall be 0.8%. The nominal im-
pedance shall be 8 ohms and the dc resis-
tance shall be 7.0 ohms. The loudspeaker
shall be capable of handling a continuous
16-watt (11.3 volts true RMS) shaped white-
2
noise signal (as per ANSI/EIA RS-426-A
1980) with a 6-dB crest factor for eight hours.
The loudspeaker shall be the Altec Lansing
model 407-8A. When fitted with a transformer
that allows connection to 70.7-, 100-volt sys-
tems of 1 to 8 watts, the loudspeaker shall
be referred to as the Altec Lansing model
407-8T, and when fitted with a transformer
that allows connection to 70.7-, 100-volt sys-
tems of 2 to 16 watts, the loudspeaker shall
be referred to as the Altec Lansing model
407-16T.
Limited Warranty
Altec Lansing products are guaranteed
against malfunction due to defects in mate-
rials or workmanship for a specified period,
as noted in the individual product-line
statement(s) below, or in the individual prod-
uct data sheet or owner's manual, beginning
with the date of original purchase. If such
malfunction occurs during the specified pe-
riod, the product will be repaired or replaced
(at our option) without charge. The product
will be returned to the customer prepaid. Ex-
clusions and Limitations: The Limited
Warranty does not apply to: (a) exterior fin-
ish or appearance; (b) certain specific items
described in the individual product-line
statement(s) below, or in the individual prod-
uct data sheet or owner's manual; (c) mal-
function resulting from use or operation of
the product other than as specified in the
product data sheet or owner's manual; (d)
malfunction resulting from misuse or abuse
of the product; or (e) malfunction occurring
at any time after repairs have been made
to the product by anyone other than EVI
Audio Service or any of its authorized
service representatives. Obtaining War-
ranty Service: To obtain warranty service,
a customer must deliver the product, prepaid,
to EVI Audio Service or any of its autho-
rized service representatives together with
proof of purchase of the product in the form
of a bill of sale or receipted invoice. A list
of authorized service representatives is avail-
able from EVI Audio Service at 600 Cecil
Street, Buchanan, MI 49107 (800/234-6831
or FAX 616/695-4743). Incidental and
Consequential Damages Excluded: Prod-
uct repair or replacement and return to the
customer are the only remedies provided to
the customer. Altec Lansing shall not be li-
able for any incidental or consequential dam-
ages including, without limitation, injury to
persons or property or loss of use. Some
states do not allow the exclusion or limita-
tion 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
also 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.
For warranty repair or service informa-
tion, contact the service repair department
at: 616/695-6831 or 800/685-2606.
For technical assistance, contact Technical
Support at 800/234-6831 or 616/695-6831,
M-F, 8:00 a.m. to 5:00 p.m. Eastern Stan-
dard Time.
Specifications subject to change without
notice.
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