Altec Lansing LF115-8A User Manual

PR OFE S S IONA L

LF115-8A

FEATURES - THE ALTEC LANSING DIFFERENCE

•High Fidelity 15” / 380 mm Low Frequency Speaker

•High Performance 250 W AES / 1,000 W Peak Power Handling

•Onboard Crossover Network with High Pass Output

•Durable 18 mm/13-Ply Poplar Cabinet Provides Easy System Expansion

•Internal Flying Points Allow Vertical Or Horizontal Suspension

•Forged Eyebolt Hardware Kit Included

•Cloth Covered Perforated Steel Grille

•Neutral Grille Cloth Included For Custom Color Matching

•Barrier Strip And Neutrik® Speakon® Input and High Pass Output Connectors

•Available In Charcoal Grey Or White Finishes

GENERAL PRODUCT DESCRIPTION

The LF115-8A is the perfect low frequency companion for the DS912-8A. Equipped with a 15 inch / 380 mm low frequency speaker housed in a durable 18 mm / 13-Ply Poplar cabinet, the LF115-8A offers affordable system expansion in an easy-to-install package. The LF115-8A will complement the low frequency performance in Auditorium and House of Worship systems.

Altec Lansing’s high performance model 4156-8A woofer is a 15 inch / 380 mm speaker with a robust corrosion-resistant die-cast frame and a weather-resistant cone for maximum durability in all environments.

The unique on-board crossover network provides simplistic addon operation without the need for an additional power amplifier channel or the costs associated with additional amplification and an active crossover. The charcoal grey or white painted cabinet blends into most backgrounds, or it can be easily painted to match any décor. Altec Lansing includes neutral grille cloth with each speaker, allowing you to dye the cloth to integrate the speaker into the surroundings. The cabinet also features internal hanging points to facilitate permanent installation in either a horizontal or vertical orientation.

FREQUENCY RESPONSE 1, 2

48 Hz - 800 Hz (±3 dB)

USABLE LOW FREQUENCY LIMIT (-10 dB) 1, 2

38 Hz

SENSITIVITY 3

100 dB SPL

POWER HANDLING 4

250 W continuous; 1,000 W peak

MAXIMUM OUTPUT (1 m) 5

124 dB SPL continuous, 130 dB SPL peak

TRANSDUCER COMPONENTS

1x 15 in. Woofer in a Vented Enclosure (4156-8A)

IMPEDANCE 7
Nominal:	8.0 Ohms
Minimum:	6.5 Ohms at 45 Hz
CROSSOVER FREQUENCY
Passive LF - HF: 200 Hz
HARMONIC DISTORTION 8
1% rated power		10% rated power
2nd Harmonic	0.33%	2nd Harmonic	1.40%
3rd Harmonic	0.36%	3rd Harmonic	0.61%
THD	0.65%	THD	1.87%

INPUT CONNECTIONS

1x 2 position barrier strip and 2x NL4

High Pass Output: 1x 2 position barrier strip and 1x NL4

CONTROLS

Low Pass On/Off switch

High Pass On/Off switch

ENCLOSURE MATERIALS & FINISH

18 mm, 13 ply Poplar Plywood Finished with Charcoal Grey or White Catalyzed Polyurethane

SUSPENSION SYSTEM 9

Working Load Limit (maximum weight applied to uppermost mounting point): 250 lbs. (113.6 kg) (12) 3/8 in.-16 Threaded Mounting Suspension Points (3 each top & bottom and 2 each sides & back)

DIMENSIONS

30.50 in. (H) x 20.00 in. (W) x 16.25 in. (D) 775 mm (H) x 508 mm (W) x 413 mm (D)

WEIGHT
Net:	75 lbs. (34.1 kg)
Shipping:	90 lbs. (40.9 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 low frequency multipurpose type consisting of a 15 inch / 380 mm cast frame loudspeaker component with a weather resistant cone. The internal passive crossover network shall be a switchable dual-section, 12 dB/octave slope low pass and 12 dB/octave slope high pass with an electro-acoustic crossover frequency of 200 Hz. The loudspeaker system shall have an operating bandwidth of 48 Hz - 800 Hz with a sensitivity of 100 dB when measured at a distance of one meter. The power handling capability shall be 250 W AES (1,000 W peak). Nominal impedance shall be 8 ohms with

a minimum impedance of 6.5 ohms at 45 Hz. The unit shall be a Vented Enclosure, constructed of 18 mm Poplar plywood painted charcoal 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 30.50 inches high by 20.00 inches wide by 16.25 inches deep. The loudspeaker system shall weigh 75 pounds (34.1 kg). The loudspeaker system shall be the Altec Lansing Professional model LF115-8A.