Page 1
DE6412-8A
P ROFESSIONAl
FEATURES - THE ALTEC LANSING DIFFERENCE
• 12” Two-Way High Output Speaker System
• High Fidelity 12” / 300mm Duplex®Point-Source Component
• Bass Horn Cabinet for LF control down to 500 Hz
• Excellent Broadband Efficiency – 102 dB 1 W 1 m
• High Output Performance – 128 dB continuous, 134 dB peak
• Large Format 1.4” Exit Throat HF Driver
• 60˚ x 40˚ Mantaray™High Frequency Horn
• Available in Charcoal Grey or White finishes
• Eyebolt suspension hardware included
GENERAL PRODUCT DESCRIPTION
Altec Lansing’s new DE6412-8A two-way 12” Duplex®point-source speaker
system is designed to provide a high output solution for reverberant spaces.
The DE6412-8A is an excellent choice for Auditoriums, Performing Arts
Centers, Houses of Worship or any application requiring high output
reproduction of both music and speech program material.
The DE6412-8A features Altec’s unique 12” Duplex®point-source speaker
component. This Duplex®“Engine” uses a single magnet structure, with
the high frequency diaphragm on the back of the magnet and the low
frequency voice coil and cone on the front of the structure. The result of
the proximity of the voice coils is a point-source alignment. Altec Lansing’s
use of this point-source Duplex®, or coaxial, design maximizes speech
intelligibility by minimizing the interference from adjacent devices that so
often occurs in traditional two-way speaker systems.
The 12” Duplex®“Engine” is installed in a bass horn cabinet. This trapezoid
enclosure provides predictable control in both the horizontal and vertical
planes to below 500Hz (see polar charts, page 3). The use of a bass horn
cabinet insures that much of the low frequency energy is kept off the
performance area, even when the speakers are flown overhead.
The DE6412-8A “Engine” is built around Altec’s large format 1.4” exit
throat high frequency compression driver, using a 2.8” Pascalite™
aluminum alloy diaphragm. The high frequency energy is fed from the
driver through the center of the magnet structure into a 60˚ x 40˚
Mantaray®high frequency horn. On the front of the magnet structure,
Altec uses a high efficiency 12”/300mm cone woofer optimized for bass
horn enclosures.
The paintable trapezoid cabinet is constructed from strong 13-ply birch
plywood, with steel reinforced suspension points. Altec includes the
suspension hardware kit with each speaker. Color choices are charcoal gray
or white, with contrasting cloth covered metal grille. The DE6412-8A has
an internal 1,200Hz passive network that can be easily switched over to
bi-amp operation. Connectors are barrier strip or Neutrik®Speakon
connectors. Altec Lansing includes neutral grille cloth with each subwoofer,
allowing you to dye the cloth to integrate the subwoofer into the
surroundings.
For extended low frequency performance, the LF215-4A is a dual
15”/380mm flyable subwoofer that has the same trapezoid footprint as the
DE6412-8A. Altec Lansing’s model 4048A 4-in x 8-out DSP processor has
available presets for a variety of design requirements.
1000 W. Wilshire Blvd., Suite 362 • Oklahoma City, Oklahoma 73116 • Phone: 1-405-848-3108 • Fax: 1-405-848-3217 • www.altecpro.com
®
FREQUENCY RESPONSE
1, 2
110 Hz - 15 kHz (±3 dB)
USABLE LOW FREQUENCY LIMIT (-10 dB)
1, 2
85 Hz
SENSITIVITY
3
Full Range: 102 dB SPL
Low Frequency Section: 103 dB SPL, (2.83 V input)
High Frequency Section: 109 dB SPL, (2.83 V input)
POWER HANDLING
4
Full Range: 400 W continuous; 1,600 W peak
Low Frequency Section: 200 W continuous; 800 W peak
High Frequency Section: 75 W continuous; 300 W peak
MAXIMUM OUTPUT (1 m)
5
Full Range: 128 dB SPL continuous; 134 dB SPL peak
Low Frequency Section: 126 dB SPL continuous; 132 dB SPL peak
High Frequency Section: 128 dB SPL continuous; 134 dB SPL peak
COVERAGE ANGLES
6
60o(horizontal) x 40o(vertical)
DIRECTIVITY FACTOR, Q
6
18.73
DIRECTIVITY INDEX, Di
6
12.73 dB
TRANSDUCER COMPONENTS
LF: 1x 12 in. Woofer in a Sealed Mid-Bass Horn (E1012)
HF: 1x 1.4 in. Exit Compression Driver (E1012 on a
Constant Directivity Mantaray™Horn)
IMPEDANCE
7
Full Range:
Nominal: 8.0 Ω
Minimum: 6.6 Ω at 140 Hz
Low Frequency:
Nominal: 8.0 Ω
Minimum: 7.3 Ω at 290 Hz
High Frequency:
Nominal: 8.0 Ω
Minimum: 7.2 Ω at 3,700 Hz
CROSSOVER FREQUENCY
Passive LF - HF: 950 Hz
HARMONIC DISTORTION
8
1% rated power
2nd Harmonic 0.98%
3rd Harmonic 0.34%
THD 1.03%
10% rated power
2nd Harmonic 2.96%
3rd Harmonic 0.74%
THD 2.90%
INPUT CONNECTIONS
2x 4 position barrier strip and 2x NL4
CONTROLS
Lowpass On/Off and Highpass On/Off switches
ENCLOSURE MATERIALS & FINISH
18 mm, 13 ply Birch Plywood Finished with Charcoal Grey
and White Catalyzed Polyurethane
SUSPENSION SYSTEM
9
Working Load Limit (maximum weight applied to uppermost
mounting point): 400 lbs. (181.8 kg)
(12) 3/8 in.-16 Threaded Mounting Suspension Points
(3 each top & bottom and 2 each sides & back)
DIMENSIONS
Net
27.13 in. (H) x 24.13 in. (W) x 26.13 in. (D) x 10.13 in. (W rear)
689 mm (H) x 613 mm (W) x 664 mm (D) x 257 mm (W rear)
Shipping
34.75 in (H) x 33.00 in (W) x 33.00 in (D) x 15.75 in (W rear)
883 mm (H) x 838 mm (W) x 838 mm (D) x 400 mm (W rear)
WEIGHT
Net 114 lbs. (51.8 kg)
Shipping 127 lbs. (57.7 kg)
Page 2
ARCHITECTS & ENGINEERS SPECIFICATION
20 50 100 200 500 1 k 2 k 5 k 10 k 20 k
Frequency (Hz)
60
70
80
90
100
110
dB SPL (ref: 20 Pa)
Frequency Response
The loudspeaker system shall be a two-way multi-purpose
type consisting of a 12 inch / 300mm Duplex
loudspeaker component featuring a 12” / 300mm low
frequency speaker combined in a single magnet structure
with a large format 1.4” exit throat high frequency
compression driver mated to a 60˚ x 40˚ Mantaray
frequency horn. The crossover network shall be a
dual-section, 12 dB/octave slope low pass and 12 dB/octave
slope high pass with an electro-acoustic crossover
frequency of 950 Hz, switchable for bi-amp operation. The
loudspeaker system shall have an operating bandwidth of
110 Hz - 15 kHz with a sensitivity of 102 dB when
measured at a distance of one meter. The power handling
capability shall be 400 W AES (1,600 W peak).
®
point-source
™
high
Nominal impedance shall be 8.0 ohms with a minimum
impedance of 6.6 ohms at 140 Hz. The loudspeaker shall
have nominal coverage angles of 60 degrees in the
horizontal plane and 40 degrees in the vertical plane.
The paintable cabinet shall be a Sealed Mid-Bass Horn,
constructed of 18 mm Birch plywood painted grey or white
with a cloth covered metal grille. The cabinet shall include
integral suspension points. Forged shoulder machinery eye
bolts shall be included to facilitate the suspension of the
speaker system. The dimensions shall be 27.13 inches (689
mm) high by 24.13 inches (613 mm) wide by 26.13 inches
(664 mm) deep. The loudspeaker system shall weigh 114
pounds (51.8 kg). The loudspeaker system shall be the
Altec Lansing Professional model DE6412-8A.
100
50
30
20
10
Z( )
5
3
2
1
20 50 100 200 500 1 k 2 k 5 k 10 k 20 k
Impedance
Frequency (Hz)
360
300
180
140
100
80
60
Beamwidth (Degrees)
40
30
20 50 100 200 500 1 k 2 k 5 k 10 k 20 k
100
Q
10
1
20 50 100 200 500 1 k 2 k 5 k 10 k 20 k
Horizontal
Vertical
Beamwidth
Frequency (Hz)
Q&Directivity Index
Frequency (Hz)
20
Di
10
0
120
110
100
90
80
70
dB SPL (ref: 20 Pa)
60
50
40
20 50 100 200 500 1k 2k 5k 10k 20k
Harmonic Distortion : 1% Rated Power
Frequency (Hz)
2nd Harmonic
3rd Harmonic
130
120
110
100
90
80
dB SPL (ref: 20 Pa)
70
60
50
20 50 100 200 500 1k 2k 5k 10k 20k
Harmonic Distortion : 10% Rated Power
Frequency (Hz)
2nd Harmonic
3rd Harmonic
Page 3
ONE-THIRD OCTAVE POLAR RESPONSE CHARTS
6 dB / DIVISION
Horizontal
30
o
60
o
90
o
120
150
30
o
60
o
90
o
120
150
180
180
o
0
o
o
0
o
330
210
330
210
o
o
300
o
270
o
240
400 Hz
o
500
Hz
630 Hz
o
o
300
o
270
o
240
3.15 kHz
o
4.00
kHz
5.00 kHz
90
120
o
90
120
o
30
o
60
o
o
o
150
o
30
o
60
o
o
150
o
0
o
o
o
o
180
180
o
o
0
o
330
210
330
210
o
o
300
o
270
o
240
200 Hz
o
o
o
300
240
250
315 Hz
o
o
270
o
1.60 kHz
2.00
2.50 kHz
Hz
kHz
90
120
90
o
o
120
o
30
o
60
o
o
150
o
30
o
60
o
o
150
180
180
o
0
o
o
0
o
330
210
330
210
o
o
300
o
270
o
240
800 Hz
o
o
o
300
240
1.00
1.25 kHz
o
o
270
o
6.30 kHz
8.00
10.0 kHz
kHz
kHz
Vertical
o
150
o
180
o
210
o
150
o
180
o
210
120
240
120
240
270
270
o
90
o
o
90
o
60
300
60
300
o
o
30
o
0
o
330
400 Hz
o
500
Hz
630 Hz
o
o
30
o
0
o
330
3.15 kHz
o
4.00
kHz
5.00 kHz
180
180
150
210
150
o
210
o
120
o
o
o
o
240
o
120
o
o
o
240
o
90
o
o
o
o
270
270
o
o
90
o
60
300
60
300
o
o
30
o
0
o
330
200 Hz
o
250
Hz
315 Hz
o
o
30
o
0
o
330
1.60 kHz
o
2.00
kHz
2.50 kHz
180
180
150
o
210
150
210
o
120
o
o
o
240
o
120
o
o
o
o
240
270
270
o
90
o
o
90
o
60
300
60
300
o
o
30
o
0
o
330
800 Hz
o
1.00
kHz
1.25 kHz
o
o
30
o
0
o
330
6.30 kHz
o
8.00
kHz
10.0 kHz
As we are continually striving to improve Altec Lansing products, specifications are subject to change without notice.
Please visit www.altecpro.com for the lastest information on Altec Lansing Professional products.
Page 4
MOUNTING DIMENSIONS
13.54 [343.83]
26.10 [663.05]
16.19 [411.26]
1.71 [43.40]
10.23 [259.78]
27.09 [688.00]
12.73 [323.28]
DENOTES CENTER OF MASS
DIMENSIONS SHOWN IN ( ) PARENTHESES ARE IN MILLIMETERS.
DIMENSIONS ARE IN INCHES.
26.10 [663.00]
10.10 [256.65]
5.05 [128.33]
16.64 [422.71]
1.71 [43.40]
7.56 [192.14]
11.87
24.10 [612.10]
6.65 [169.00]
15
12.73 [323.28]
SPECIFICATION NOTES
1 The frequency response of the loudspeaker system is measured at a distance of no less than 3 meters to obtain full range data. The level is
then corrected to be equivalent to a 2.83 V 1 m measurement. A near field measurement of the loudspeaker system is performed for
frequencies below 500 Hz. This data is then combined with the full range measurement to give an accurate composite frequency response
curve.
2 The limits of the frequency response are referenced to -3 dB of the systems rated sensitivity.
3 The sensitivity of the loudspeaker system is the log based average SPL taken over the intended bandwidth of operation for the system with a
2.83 V swept sine stimulus. The data is measured and level corrected in a manner consistent with note 1.
4 The power handling capacity of the loudspeaker system is tested using a full range form of AES Standard 2-1984. The test stimulus is band
limited (40 Hz – 16 kHz) pink noise with a 6 dB crest factor. The applied RMS voltage is determined using the minimum impedance of the
system. The amplifier used to drive the system has a minimum operating headroom of 6 dB referenced to the RMS voltage.
5 The maximum output level of the loudspeaker system is calculated based on the sensitivity and the power handling capabilities of the
system.
6 The coverage angles for the loudspeaker system are taken as the -6 dB points of the directivity response and averaged from 500 Hz – 16 kHz.
7 The minimum impedance of the loudspeaker system is taken over its intended band of operation.
8 The distortion measurements of the loudspeaker system are performed at a distance of 1 m with RMS input voltages corresponding to 1%
and 10% of rated system power handling calculated using minimum system impedance. The distortion percentages are log based averages
from 300 Hz – 3 kHz.
9 Before attempting to suspend the loudspeaker system, consult a certified structural engineer. This loudspeaker system can fall from
improper suspension, resulting in serious injury and property damage. Suspend this loudspeaker system using no less than two of its
suspension points. Maximum enclosure rigging angle is 45°. Use only the correct mating hardware, forged shoulder machinery eye bolt, Mil
Spec MIL 51937-3. All associated rigging is the responsibility of others.
VISIT WWW.ALTECPRO.COM FOR
• Authorized EASE®data on Altec Lansing Professional speakers.
• Specification sheets in .pdf format. Download page 1 of the specification sheet for your submittals.
• One paragraph A & E Specifications in .doc format.
AW1140 REV03
P ROFESSIONAl
© 2003 Altec Lansing Professional
1000 W. Wilshire Blvd., Suite 362
Oklahoma City, Oklahoma 73116
Phone: 1-405-848-3108 • Fax: 1-405-848-3217
Web: www.altecpro.com • Email: proinfo@alteclansing.com
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