Model 2215 is a professional quality low frequency loud- speaker capable of handling high power with negligible distortion. Overall sensitivity is controlled to ...
Model 2215 is a professional quality low frequency loudspeaker capable of handling high power with negligible distortion. Overall sensitivity is controlled to give linear response overthefull bandwidth of the device.The 2215 was designed for critical monitoring applications where linear bass response with lowest possible distortion is required ratherthan high midrangeefficiency. Optimum performance is realized in an enclosure having 6-8 cubic feet internal volume.
The JBL 2215 incorporates a long-travel critically damped cone assembly, 4-inch edgewound copper ribbon voice coil, and highly efficient magnetic circuit with individually machined pole pieces and pot casting. Unlike other longthrow woofers, the relatively light voice coil operates in an unusually deep magnetic gap, resulting in near perfect linearity and superb transient response.The sophisticated design of Model 2215, plus JBLS precise tolerances and unique assembly techniques, result in a true state-of-the-art low frequency loudspeaker.
Model 2215 Low Frequency Loudspeaker Architectural Specifications low frequency loudspeaker shall have a nominal diameter uI 15 inches, overall depth not greater than 5% inches, and weigh at least 23% pounds. The frame shall be of cast aluminum to resist deformation and the magnetic assembly shall use Alnico V encased in a heavy cast iron return circuit for maximum efficiency and suppression of stray fields. The voice coil shatkbe four inches in diameter and shall be made of’edgewound copper ribbon operating in a magnetic field of not less than 11,000 gauss. Performance specifications of a typical production
unit shall
be as follows: Measured sensitivity (SPL at 30 feet with one mW input, warbled 100-500 Hz1 shall be within 43-45 dB on-axis and 42-44 dB off-axis,
As an indication of electromechanical
conversion
efficiency,
the BI factor shall be at least 2.2~10’ dynes/abampere. Useable frequency response shall extend from 35 to 1200 Hz. On-axis response, measured at a distance of six feet or more in a free field environment, shall be + 3 dB from 40 to 800 Hz. Nominal impedance shall be 8 or 16 ohms. Power
capacity shall be a minimum of 150 Watts normal program ‘erial. ‘\_ The loudspeaker shall be JBL Model 2215. Other loudspeakers will be considered for equivalency provided that submitted data from a recognized independent test laboratory verify that the above performance specifications are met.
Frequency response contour of Model 2215 in a closed box of six cubic feet internal volume. Measured response of a typical production unit, including all peaks and dips, does not deviate more than 2 df3 from the above curve. Additional acoustic loading (passive radiator or port1 will further extend bass response.
James B. Lansing Sound.Inc.. 8500 Balboa Boulevard, Northridge. California 91329
Nominal impedance shall be 16 ohms and power capacity shall be at least 30 ... submitted data from a recognized independent test laboratory verify that the ...
The AES takes no responsibility for the contents. Additional papers ... array are arranged in a straight line while the lower elements are arranged to point .... Note that the maximum pressure at any given distance and frequency may ..... dominates t
overall depth not greater than 191 mm (7% in). and weigh at least 13.6 kg (30 lb). The frame ... Rated power capacity shall be at least 600 W normal program ...
Nominal impedance shall be 8 ohms and power capacity shall exceed ... data from a recognized independent test laboratory verify that the above performance ...
Additionally it is desired that the line array take on different vertical patterns dependant upon use. This requires the .... energy at 100 meters in the high end would probably be offset by air ..... 10 degrees. Note irregularity at high frequencies
Tooling is made from the same CAD file used to make the prototype. This assures final performance equals the initial prototype. Figure 12 shows the production ...
Nominal impedance shall be 16 ohms and power capacity shall be at least 30 ... submitted data from a recognized Independent test laboratory verify that the ...
The loudspeaker shall have a nominal diameter of 200 mm. (8 in), overall depth not ... submitted data from a recognized independenttest laboratory verify that ...
conditions, and application of scientific principles to ... JBL has developed a software application that ... A Microsoft Excel⢠Line Array Calculator program has ...
Measured sensitivity with a Ä°mW input on 25 mm II ini terminated tube,. VEFHud IFHA 50 Hz ... parts assure greater resistance to mechanical shock. Diaphragm ...
system. By dividing the audio spectrum before power am- plification, treble tones are separated from, and unaffected by, bass frequencies. The result is more ...
number of mathematical equations. ... music reinforcement, the mass break-point is in the 3500 voice coil .... extension of the theory verified here to show that the.
Speech Intelligibility - A JBL Professional Technical Note. 1. ... and sports venues takes on greater impor- .... speech power is in the 250 and 500 Hz bands,.
edge-wound aluminum ribbon voice- coil motor structure. ... Composite octave polar responses of the 2155H in both horizontal and vertical planes over the ...
The low frequency transducer shall have a nominal diameter of 380 mm 115 InI, ... submitted data from a recognized independent test labora- tory verify that the ...
Nominal impedance shall be 16 (8) ohms and powercapacfty shall be at least 60 watts ... submitted data from a recognized independenttest laboratory verify that ...
or other similar applications where high sound power output and smooth low frequency response are requrred All are ruggedly constructed of dense, high ...
Though the world of music is continually evolv- ing, there are a few constants. And in terms of sonic characteristics, the definitive sounds pro- duced by the ...
7. MPRO 400 SERIES MODELS. MP410 - 10 , two-way, bass-reflex. Main PA for speech, vocals and instrument reinforcement. A great choice as a satellite over the MP418S or MP418SP for dance music and DJ use. Get professional quality and performance from
A review of the literature reveals that the polar response of a line source is generally ..... is chosen to be coincident with the leading edge of the arc at the top.
Route cables so that performers, production crew, and audience will not trip over them pulling the speaker over. • Do not .... roder les contacts électriques.
for multichannel sound presentation. In this. Technical Note, we will present a history of multi- channel ... in this fashion. ... multichannel sound during the 1960's.
