Altec Lansing LF115-8A LF SPEAKER SYSTEM Benutzerhandbuch

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)

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 add-

on 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.

PROFESSIONAl

1000 W. Wilshire Blvd., Suite 362 • Oklahoma City, Oklahoma 73116 • Phone: 1-405-848-3108 • Fax: 1-405-848-3217 • www.altecpro.com

ARCHITECTS & ENGINEERS SPECIFICATION

The loudspeaker system shall be a low frequency multi-

purpose 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.

INPUT

LOW

PASS

FILTER

HIGH

PASS

FILTER

PIN 1 +

HIGH PASS OUTPUT

8 OHMS

HIGH PASS OUTPUT

If HP Output

is not used,

the HP Filter

must be

turned off.

OFF OFF

Altec Lansing Professional

Oklahoma City, OK 73116

A division of Altec Lansing Technologies, Inc., Milford, PA 18337-0277 • Made in China

LF115-8A

PIN 1 -

PIN 1 +

PIN 1 -

INPUT PLATE

As we are continually striving to improve Altec Lansing products, specifications are subject to change without notice.

Please visit www.altecpro.com for the latest information on Altec Lansing Professional Products.

AP1100 REV01

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: [email protected]

PROFESSIONAl

19.94 [506.40]

DIMENSIONS ARE IN INCHES.

DIMENSIONS SHOWN IN ( ) PARENTHESES ARE IN MILLIMETERS.

DENOTES CENTER OF MASS

16.22 [412.00]

7.24 [184.0

6.98 [177.4

30.56 [776.20]

1.71 [43.45]

7.87 [200.00]

9.97 [253.20]

7.87 [200.00]

1.71 [43.45]

7.87 [200.00]

13.78 [350.00]

1.71 [43.45]

7.87 [200.00]

MOUNTING DIMENSIONS

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 AES Standard 2-1984. The test stimulus is band limited (30 Hz – 300

Hz) 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.

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 40 Hz – 300 Hz.

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. 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 all 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

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