Atlas Sound GD87W Manual de Usario

Atlas Sound Vocero GD87W

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Specifications subject to change without notice
© 2002 Atlas Sound Printed in U.S.A. 001102 ATS001454 RevA 11/02 SL1-2025
2.65
One
1601 JACK MCKAY BLVD. / ENNIS, TEXAS 75119 U.S.A.
TELEPHONE: (800) 876-3333 / FAX (800) 765-3435 AtlasSound.com
8" PREASSEMBLED SPEAKER PACKAGE W/ BAFFLE GD87W
FEATURES
• Industry standard 8" (203mm) coaxial, 16 watt, loudspeaker with
high quality factory installed 8 watt line matching transformer and
white CRS baffle
• Offers proven performance with wide frequency response
• Post-mounted tweeter adds strength and a more attractive appearance
• Ideal for multi-purpose commercial, industrial, and institutionals use
• Individually packaged for stocking & ordering convenience
APPLICATIONS
Use Atlas Sound 8" (203mm) dia., multi-purpose, coaxial loudspeaker
Model GD87W for voice transmission, music and signal reproduction in
high-quality commercial, industrial and institutional applications.
GENERAL DESCRIPTION
The speaker used in the GD87W is the next generation of Atlas Sound
high performance cone loudspeakers, very similar to the preceding
C-Series speakers. The similarity in the sonic qualities ensures that
contractors and designers who have worked with the Atlas Sound C803A
Series in the past will know exactly what to expect when they use the
GD87W.
High-quality, 25W Model GD87W utilizes a post mounted tweeter which
adds strength to the assembly and provides an attractive appearance.
This coaxial loudspeaker features a 55Hz-15kHz ±5dB frequency
response and a broad, uniform dispersion pattern of 90° @ 2kHz. Such
provisions allow for highly intelligible sound reproduction and better
distribution for high-quality sound systems. The GD87W combines a
full-size 8" (203mm) dia. low-frequency reproducer and a 3" (76mm)
high-frequency reproducer. The two sections are coupled via a built-in
crossover network. The woofer has a 10 oz. (260g) ceramic magnet; the
tweeter has a 2.35oz. (67g) ceramic magnet.
The unit has an average sensitivity of 96dB (1W/1M). The loudspeaker is
matched with a high efficiency 8 watt 70.7V transformer with a maximum
insertion loss of 0.6dB. This premium transformer is constructed of audio
grade laminations and has a full range frequency response of +1dB from
50Hz-15KHz. The primary taps are 1, 2, 4, and 8 watts. The GD87W
includes a factory installed CRS baffle with concealed loudspeaker
mounting studs and includes screw mount hardware. The baffle finish is
white powder coat epoxy.
ARCHITECT & ENGINEER SPECIFICATIONS
Unit shall be Atlas Sound 8" diameter. loudspeaker/transformer/
bafflecombination Model GD87W The low-frequency reproducer cone
shall be a full 8" (203mm) in diameter and the high frequency reproducer
cone shall be 3" (76mm) in diameter. The woofer shall have a 10 oz.
(260g) ceramic magnet; the tweeter shall have a 2.35oz. (67g) ceramic
magnet. The two reproducer sections shall be coupled through a built-
in crossover network. The crossover frequency shall be at 2800Hz.
Frequency response range shall be 55Hz-15kHz ±5dB. Average
sensitivity shall be 96dB (1W/1M). Low frequency voice coil diameter
shall be 1" (25mm) and operate in a magnet field of at least 10,600
gauss. Transformer primary voltage shall be 70.7V with a frequency
response range of ±1dB-50Hz-15KHz and power taps at 1,2,4, and 8
watts. Insertion loss shall not exceed .6dB. Unit shall include factory
installed CRS baffle. Baffle shall included welded speaker mounting studs
and all necessary hardware to match the baffle to associated optional
hardware. Baffle overall diameter shall not exceed 12
1⁄4” (324mm) Baffle
shall be finished in white powder coat epoxy. The maximum depth of the
loudspeaker/transformer/baffle package shall not exceed 2.875" (73mm).
The GD87W baffle features standard mounting holes to accommodate
the majority of Atlas Sound 8" tile bridges, mounting rings and
enclosures. When specifying mounting hardware be advised that the
dimensions of the GD87W baffle match the Atlas Sound Model 62-8.
GD87W SPECIFICATIONS
Size 8” (205mm)
Power Handling 25 Watts Peak, 15 Watts RMS
Sensitivity 96dB Average
Impedance 8 Ohms Nomina
Frequency Response 45 Hz-19 kHz Nominal, 55 Hz-15 kHz ±5dB
Dispersion 105° (2 kHz Octave Band, -6dB Points)
Diameter & Depth 8.125” (205mm) Dia. & 2.875” (73mm) Deep
Mounting Dimensions 7.625” (194mm) Bolt Circle
Cone Material Treated Paper
Surround Material & Damping Damped Self Edge
Flux Density 10,600 Gauss, 1.06 Tesla
Magnet Weight Nominal, 10 oz. (260g)
Basket Material Stamped Plated 20 ga. CRS
VC Diameter 1” (25mm)
VC Material Copper
VC Former Material Black Anodized Aluminum
VC Winding Width .225”
Top Plate Thickness .239”
Weight 32 oz. (908g)
THIELE-SMALL PARAMETERS
Pe 15 watts
Fs 125 Hz
Xmax .05”
Resistance 7.3 ohms
Qts 0.8
Qes 0.95
Qms 5.2
BL 7.9 N/A
Efficiency 1.90%
Vas .32 (ft3)
Sd 33.2 (in2)
Le@1kHz .36 mH
Mms .39 oz.
Cms .024 in./lb.
Transformer Specifications
Frequency Response 50Hz-15kHz (±1dB)
Primary Taps (Watts) 1, 2, 4 & 8
Secondary Impedance (ohms) 4 & 8
Maximum Insertion Loss .6dB
Primary Termination 6" (152mm) Com. Lead Color Coded
Core Size 1" x 3
⁄4" (25 X 19mm)
Power Rating (Watts) 8
GD87W
(Front View) (Rear View)
Specifications subject to change without notice
© 2002 Atlas Sound Printed in U.S.A. 001102 ATS001454 RevA 11/02 SL1-2025
1601 JACK MCKAY BLVD. / ENNIS, TEXAS 75119 U.S.A.
TELEPHONE: (800) 876-3333 / FAX (800) 765-3435 AtlasSound.com
GD87W Frequency Response
(Transformer Bypassed)
Frequency Hz
dB Pa
GD87W Impedance
(Transformer Bypassed)
Frequency Hz
Ohms
Fundamental
Fundamental vs. 2nd & 3rd Harmonics
Frequency Hz
2nd Harmonic
3rd Harmonic
* (C) Speaker mounting stud pattern.
** (D) Baffle mounting hole pattern.
EQ81 tile bridge works only with 96-8 Series enclosures.
Side ViewFront View
GD87W BAFFLE INFORMATION
DIMENSIONS MOUNTS OPTIONAL
MODEL DIA. (A) PROJECTS (B) (C)* (D)** ENCLOSURE (OR) MTG. RING TILEBRIDGE
12GD87W 3
⁄4" 1⁄4" 75
⁄8" 111
⁄4"
(EZ )95-8 Series, T95-8 Series,
75-8(E1)(E2), 81-8R(S)
(324mm) (6mm) (194mm) (286mm) EZ96-8, CS95-8(NS), 76-8(E1)(E2),
199-8, Q408, 96-8 Series P77-8, P78-8 EQ81s
GD87W OCTAVE BAND POLARS
© 2004 Atlas Sound LP Printed in U.S.A. 00604 ATS001827 RevA 6/04 SL1-2047

Especificaciones del producto

Marca: Atlas Sound
Categoría: Vocero
Modelo: GD87W

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