Altec lansing DE6412-8A User Manual

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: [phone] • Fax: [phone] • 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)

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