Altec lansing DE9412-8A User Manual

PR OFE S S IONA L

DE9412-8A

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 – 127 dB continuous, 133 dB peak

•Large Format 1.4” Exit Throat HF Driver

•90˚ x 40˚ Mantaray™ High Frequency Horn

•Available in Charcoal Grey or White finishes

•Eyebolt suspension hardware included

GENERAL PRODUCT DESCRIPTION

Altec Lansing’s new DE9412-8A two-way 12” Duplex® point-source speaker system is designed to provide a high output solution for reverberant spaces. The DE9412-8A 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 DE9412-8A 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 500 Hz (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 DE9412-8A “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 90˚ 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 grey or white, with contrasting cloth covered metal grille. The DE94128A has an internal 1,000 Hz 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 DE9412-8A. Altec Lansing’s model 4048A 4-in x 8-out DSP processor has available presets for a variety of design requirements.

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:	108 dB SPL, (2.83 V input)
POWER HANDLING 4
Full Range:	300	W continuous; 1,200 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: 127 dB SPL continuous; 133 dB SPL peak

Low Frequency Section: 126 dB SPL continuous; 132 dB SPL peak High Frequency Section: 127 dB SPL continuous; 133 dB SPL peak

COVERAGE ANGLES 6

90o (horizontal) x 40o (vertical)

DIRECTIVITY FACTOR, Q 6

13.97

DIRECTIVITY INDEX, Di 6

11.45 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:	6.5	Ω at 3,500 Hz
CROSSOVER FREQUENCY
Passive LF - HF:	1,000 Hz
HARMONIC DISTORTION 8
1% rated power
2nd Harmonic	0.97%
3rd Harmonic	0.31%
THD	1.01%
10% rated power
2nd Harmonic	2.85%
3rd Harmonic	0.81%
THD	2.80%

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 or White Catalyzed Polyurethane

SUSPENSION SYSTEM 9

Working Load Limit (maximum weight applied to uppermost mounting point): tbd lbs. (tbd kg)

(12) 3/8 in.-16 Threaded Mounting Suspension Points (3 each top & bottom and 2 each sides & back)

DIMENSIONS

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)

WEIGHT
Net	97 lbs. (44.1 kg)
Shipping	116 lbs. (52.7 kg)

1000 W. Wilshire Blvd., Suite 362 • Oklahoma City, Oklahoma 73116 • Phone: [phone] • Fax: [phone] • www.altecpro.com

ARCHITECTS & ENGINEERS SPECIFICATION

The loudspeaker system shall be a two-way multi-purpose type consisting of a 12 inch / 300mm Duplex® point-source 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 90˚ x 40˚ Mantaray™ high 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 1,000 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 300 W AES

(1,200 W peak). 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 90 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 97 pounds (44.1 kg). The loudspeaker system shall be the Altec Lansing Professional model DE9412-8A.