Altec Lansing 407-8A User manual

Description
The Altec-Lansing 407 series are high-qual-
ity 6.5-inch duplex loudspeaker for distrib-
uted sound systems available in three ver-
sions: standard 8-ohm (407-8A), 8-ohm
with 8 W transformer (407-8T) and 8-ohm
with 16 W transformer (407-16T).
The loudspeakers feature 6.5-inch low-fre-
quency cones and high-temperature voice-
coil assemblies coaxially mounted with
wide-dispersion neodymium tweeters. The
dual-magnet construction allows each
speaker to be electrically and mechanically
independent of the other. The 407-8A loud-
speaker utilizes a crossover network, cen-
tered at 3,000 Hz, that provides tweeter pro-
tection outside of its operating range.
The 407-8A is suitable for use in applica-
tions requiring highly intelligible speech or
smooth musical reproduction.
To ensure long-term reliability in instal-
lations, the 407-8A is designed to handle
16 watts continuous power (64 watts peak)
of shaped white noise for eight hours per
ANSI/EIA RS-426-A 1980.
The 407-8T utilizes a transformer that of-
fers a selection of 1-, 2-, 4- and 8-watt taps
delivered to the loudspeaker system using
either 70-V or 100-V lines.
The 407-16T utilizes a transformer that of-
fers a selection of 2-, 4-, 8- and 16-watt taps
delivered to the loudspeaker system using
either 70-V or 100-V lines.
Directional Performance
Thedirectionalcharacteristicsofthe407-8A
in a 1.8 cubic-foot vented enclosure were
measuredbyrunningasetofpolarresponses
in Altec Lansing's large anechoic chamber.
The test signal was one-third-octave-band-
limited pseudo-random pink noise centered
at the ISO standard frequencies indicated in
Figure 1.
Additional typical data is provided in
Figures4and 5, which indicate 6-dB-down
beamwidth versus frequency and directivity
factor, respectively, for a 407-8A in the test
enclosure.
Power-Handling Test
The 407-8A is designed to withstand the
power test described in ANSI/EIA RS-426-A
1980. The EIA test spectrum is applied for
eight hours. To obtain the spectrum, the out-
put of a white-noise generator (white noise
is a particular type of random noise with
equal energy per bandwidth in Hz) is fed to
a shaping filter with 6-dB-per-octave slopes
below 40 Hz and above 318 Hz. When mea-
suredwitha usual constant-percentage-band-
width analyzer (one-third-octave), this
shaping filter produces a spectrum whose
3-dB-down points are at 100 Hz and 1,200 Hz,
witha 3-dB-per-octave slopeabove 1,200 Hz.
This shaped signal is sent to the power ampli-
fierwiththecontinuouspowersetat16watts
intothe EIA equivalentimpedance (11.3volts
true RMS). Amplifier clipping sets instan-
taneous peaks at 6 dB above the continuous
power, or 64-watts peak (22.6 volts peak).
This procedure provides a rigorous test of
both thermal and mechanical failure modes.
Recommended Connections
The 407-8A is a nominal 8-ohm impedance
loudspeaker with a 16-watt input capabil-
ity. The 407-8T utilizes an 8-watt, 70.7-,
100-volt universal line-matching trans-
former with power taps ranging from 1 to
8 watts. The 407-16T utilizes a 16-watt,
70.0-, 100-volt universal line-matching
transformer with power taps ranging from
2 to 16 watts.
Recommended Enclosures and Baffles
The 407-8A, 407-8T, 407-16T are designed
to fit on standard 6.5-inch ceiling speaker
baffles.Additionally, these loudspeakers will
407 SERIES
6.5-Inch Duplex Full-
Range High Performance
CeilingLoudspeakers
•407-8A407-8A
407-8A407-8A
407-8A, 8 ohm,16 watts
(EIA RS-426-A)
•407-8T407-8T
407-8T407-8T
407-8T, with 8 watt multi-tap
transformer
•407-16T407-16T
407-16T407-16T
407-16T,with 16 watt multi-
tap transformer
•High efficiency: 93 dB for 1W @ 1M
•Maximum SPL: 105 dB for
16W @ 1M
•Frequency response: 95 Hz - 18 kHz
•Wide dispersion
•Duplex construction

407 Series 6.5-Inch Duplex Full-Range High Performance Ceiling Loudspeakers
407 Series 6.5-Inch Duplex Full-Range High Performance Ceiling Loudspeakers
2
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-
frequencyoutput.Thefrequencyresponseof
a407-8Ainatypical 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
(10,000Gauss). Theloudspeakershall 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
frequencyresponse with3-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(11.3voltstrueRMS)shapedwhite-
noise signal (as per ANSI/EIA RS-426-A
1980)witha 6-dB crestfactorfor eight hours.
The loudspeaker shall be the Altec Lansing
model407-8A.Whenfittedwithatransformer
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,
acustomermustdeliver 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
ofauthorizedservice representatives is avail-
able from EVI Audio Service at 600 Cecil
Street, Buchanan, MI 49107 (800/234-6831
or FAX [phone]). 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-
ableforanyincidental 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.
AltecLansing Speakers and Speaker Sys-
temsare guaranteed against malfunction due
to defects in materials or workmanship for a
periodoffive (5) years from the date oforigi-
nalpurchase.TheLimited Warranty doesnot
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.
Fortechnical 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.

407 Series 6.5-Inch Duplex Full-Range High Performance Ceiling Loudspeakers
407 Series 6.5-Inch Duplex Full-Range High Performance Ceiling Loudspeakers
3
Figure 1—Frequency Response
Figure 2—Polar Response

407Series6.5-InchFull-RangeLoudspeakers
407-8A,407-8T,407-16TFull-RangeLoudspeakers
Figure 3—Impedance
Figure 5—Directivity
Figure 4—Beamwidth
407 Series 6.5-Inch Full-Range Loudspeakers
4

407Series6.5-InchFull-RangeLoudspeakers
407 Series 6.5-Inch Full-Range Loudspeakers
Figure 6—Wiring
Figure 7—Dimensions
5
COMMON
BLACK LEAD
WHITE LEAD
COMMON
YELLOW
ORANGE
RED
BROWN
1.0 dB
0.5 dB
+
-
COMMON
BLACK LEAD
WHITE LEAD
COMMON
YELLOW
ORANGE
RED
BROWN
1.0 dB
0.5 dB
+
-
Table 2
16.0 W
8.0 W
4.0 W
2.0 W
COMMON
8 ohms
Common
70 V
BROWN
RED
ORANGE
YELLOW
BLACK
White
Black
100 V
RED
ORANGE
YELLOW
N/A
BLACK
White
Black
Table 1
8.0 W
4.0 W
2.0 W
1.0 W
COMMON
8 ohms
Common
70 V
BROWN
RED
ORANGE
YELLOW
BLACK
White
Black
100 V
RED
ORANGE
YELLOW
N/A
BLACK
White
Black
407-16T
407-8T
8 Ω
8 Ω

407 Series 6.5-Inch Duplex Full-Range High Performance Ceiling Loudspeakers
407 Series 6.5-Inch Duplex Full-Range High Performance Ceiling Loudspeakers
6
Ceiling Speakers Part # 533685—9813
Specifications
Frequency Response:
95-18,000 Hz, ±5 dB (see Figure 1)
Power-Handling Capacity per ANSI/
EIA RS-426-A 1980 (85- to 15,000-Hz
band-limited pink noise, 6-dB crest
factor):
16 watts
Impedance,
Nominal:
8 ohms
Minimum:
5 ohms (15 kHz)
Sound Pressure Level at 1 Meter, 1
Watt Input, 200- to 4,000-Hz Average:
93 dB
Maximum SPL at 1 Meter, 16 Watts
Input, 200- to 4,000-Hz Average:
105 dB
Voice-Coil Diameter:
25.4 mm (1.0 in.)
Magnet Weight:
0.32 kg (0.72 lb)
Magnet Material:
Barium Ferrite
Flux Density:
1.0 Tesla
Speaker Frame:
22-gauge stamped steel
Frame Color:
Black
Dimensions,
Diameter,
407-8A, 407-8T, 407-16T:
167 mm (6.6 in.)
Height,
407-8A:
62 mm (2.45 in.)
407-8T, 407-16T:
119 mm (4.70 in.)
Net Weight,
407-8A:
1.0 kg (2.2 lb)
407-8T, 407-16T:
1.5 kg (3.3 lb)
Shipping Weight,
407-8A:
1.2 kg (2.6 lb)
407-8T, 407-16T:
1.6 kg (3.5 lb)
Transformer Input,
407-8T, 407-16T:
70.0- or 100-volt line
Transformer Specifications
Frequency Response:
65- to 15,000 Hz, ±3 dB
Insertion Loss:
<1.0 dB
Secondary Impedance:
8 ohms
Primary Impedances and Power Draw
for 407-8T & 407-16T:
15708E 15716E
5,000 ohms 2,500 ohms
1.0 watts 2.0 watts
2,500 ohms 1,250 ohms
2.0 watts 4.0 watts
1,250 ohms 625 ohms
4.0 watts 8.0 watts
625 ohms 312 ohms
8.0 watts 16.0 watts
Connection Type:
Eight-way barrier strip that will accept
(2) #10 Gauge wires.
600 Cecil Street, Buchanan, MI 49107
616/695-6831, 616/695-1304 Fax
©EVI Audio 1998 • Litho in U.S.A.