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Manual abstract: user guide ALTEC LANSING 291-8L HF DRIVER
Detailed instructions for use are in the User's Guide.
[. . . ] (383 mm)
GENERAL PRODUCT DESCRIPTION
The 4156-8A is the latest in a 60 year Altec Lansing tradition of quality loudspeaker components. High power, high efficiency and linear response make this 15" (381 mm) transducer a very capable low frequency component for conventional cluster designs or subwoofers. Possibly the most celebrated legacy of Altec Lansing is dependability. [. . . ] The 4156-8A loudspeaker is constructed from a reinforced corrosion-resistant die-cast frame, a rugged ferrite magnet structure, and a weather-resistant cone. The 4156-8A loudspeaker is designed for direct radiator vented enclosures. An internal enclosure volume of just under 4 cubic feet (113 liters) is all that is required for the 4156-8A loudspeaker to provide 3 dB down frequency response to 50 Hz. Installation of this low frequency loudspeaker is made simple with 0. 25 inch (6 mm) blade type wire terminals on a two position barrier strip, allowing bare wire leads, solder connections or crimp type quickconnect wire terminals. The Altec Lansing model 4156-8A is an excellent component for custom subwoofers and a perfect complement to our high frequency compression drivers when the requirements are high power capability, linear low frequency response, high acoustic output level, and absolute reliability.
THEILE-SMALL PARAMETERS:
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1000 W. Wilshire Blvd. , Suite 362 · Oklahoma City, Oklahoma 73116 · Phone: 1-405-848-3108 · Fax: 1-405-848-3217 · www. altecpro. com
ARCHITECT'S AND ENGINEER'S SPECIFICATIONS
The loudspeaker shall be a multi-purpose 15 inch / 381 mm low frequency cone driver. The loudspeaker shall have an operating bandwidth of 27 Hz - 3. 4 kHz with a sensitivity of 99 dB when measured at a distance of one meter. The data is measured and level corrected in a manner consistent with note 1. 4 The power handling capacity of the loudspeaker 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 loudspeaker. The amplifier used to drive the loudspeaker has a minimum operating headroom of 6 dB referenced to the RMS voltage. 5 The maximum output level of the loudspeaker is calculated based on the sensitivity and the power handling capabilities of the system. 7 The minimum impedance of the loudspeaker is taken over its intended band of operation. [. . . ] 7 The minimum impedance of the loudspeaker is taken over its intended band of operation. 8 The distortion measurements of the loudspeaker are performed at a distance of 1 m with RMS input voltages corresponding to 1% and 10% of rated power handling calculated using minimum loudspeaker impedance. The distortion percentages are log based averages from 50 Hz 1 kHz.
VISIT WWW. ALTECPRO. COM FOR
· Authorized EASE data on all Altec Lansing Professional loudspeakers · Specification sheets in . pdf format. [. . . ]
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