Altec Lansing LF115-8A User Manual

LF115-8A

P ROFESSIONAl

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
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.

Speakon®Input and High Pass

FREQUENCY RESPONSE

48 Hz - 800 Hz (±3 dB)

USABLE LOW FREQUENCY LIMIT (-10 dB)

38 Hz

SENSITIVITY

100 dB SPL

POWER HANDLING

250 W continuous; 1,000 W peak

MAXIMUM OUTPUT (1 m)

124 dB SPL continuous, 130 dB SPL peak

TRANSDUCER COMPONENTS

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

IMPEDANCE

Nominal: 8.0 Ohms
Minimum: 6.5 Ohms at 45 Hz

CROSSOVER FREQUENCY

Passive LF - HF: 200 Hz

HARMONIC DISTORTION

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

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)

3

7

1, 2

1, 2

4

5

8

9

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.