Atlas 8" Coaxial Loudspeaker C803A User manual

Specifications subject to change without notice
© 2001 Atlas Sound LP Printed in U.S.A. 000501 SL1-1037
57
ONE
1601 JACK MCKAY BLVD. / ENNIS, TEXAS 75119 U.S.A. / TELEPHONE: [phone] / FAX [phone]
MODEL COMBINATIONS /TRANSFORMER SPECIFICATIONS
SPKR. / XFMR. PRIMARY
COMBINATIONS XFMR. PRIMARY XFMR. FREQUENCY TAPS SECONDARY INSERTION CORE POWER
AVAILABLE VOLTAGE RESPONSE (WATTS) IMPEDANCE LOSS (MAX) SIZE RATING
C803AT25 LT-25 25 V 100 Hz - 10 kHz, ±1.5dB .5, 1, 2 & 5 8 Ohms 1.5dB
1
⁄
2 " x
5
⁄
8 " (16 x 16mm) 5 Watts
C803AT47 HT-47 70.7 V 60 Hz - 12 kHz, ±1.0dB .5, 1, 2 & 4 8 Ohms 1.0dB
5
⁄
8 " x
5
⁄
8 " (16 x 16mm) 4 Watts
C803AT70 LT-70 70.7 V 100 Hz - 10 kHz, ±1.5dB .5, 1, 2 & 5 8 Ohms 1.5dB
1
⁄
2 " x
5
⁄
8 " (16 x 16mm) 5 Watts
C803AT72 LT-72 25/70 V 100 Hz - 10 kHz, ±1.5dB .5, 1, 2 & 4 8 Ohms 1.5dB
1
⁄
2 " x
5
⁄
8 " (16 x 16mm) 4 Watts
C803AT82 HT-82 25 V 50 Hz - 15 kHz, ±1.0dB 1, 2, 4, 8 4 & 8 Ohms 0.6dB 1" x
3
⁄
4 " (25 x 19 mm) 8 Watts
C803AT87 HT-87 70.7 V 50 Hz - 15 kHz, ±1.0dB 1, 2, 4, 8 4 & 8 Ohms 0.6dB 1" x
3
⁄
4 " (25 x 19mm) 8 Watts
SPECIFICATIONS
Speaker Size: LF: 8" (203mm), HF: 3" (76mm)
Power Rating: 16 Watts RMS
Sensitivity (SPL at 1W/1M): 98dB (peak), 95dB (avg)
Impedance: Nominal, 8 ohms
Frequency Response: 70 Hz - 15.5 kHz (±5dB)
Crossover Frequency: 2,800 Hz, First Order
Dispersion: 120°
Mounting Dimensions: 7
5
⁄
8 " (194mm) B.C.
Cone Material: Treated Paper
Surround Material & Damping: Self Edge with Dampener
Flux Density: 10,600 Gauss, 1.06 Tesla
Magnet Weight: Nominal, 10 oz. (260g)
Basket Material: 20 ga. Stamped Steel
Voice Coil Diameter: 1" (25mm)
Voice Coil Material: Copper
Voice Coil Former Material: Black Anodized Aluminum
Voice Coil Winding Width: .265 (7mm)
Top Plate Thickness: .239 (6mm)
Weight: 2.4 lbs. (1060g)
Diameter & Depth Less Xfmr: 8
1
⁄
8 " (206mm) Dia. & 2
7
⁄
8 " (73mm) Deep
For additional information on Atlas Sound transformer models, refer to technical literature #SL1-1369.
FEATURES
• Industry Standard 8" (203mm) Coaxial, 16-Watt, Loudspeaker
• Offers Proven Performance with Wide Frequency Response
• Post-Mounted Tweeter Adds Strength and a More Attractive
Appearance
• Ideal for Multi-Purpose Commercial, Industrial, and Institutional Use
APPLICATIONS
Use Atlas Sound 8" (203mm) dia., multi-purpose, coaxial loudspeaker
Model C803A for voice transmission, music and signal reproduction in
high-quality commercial, industrial and institutional applications.
GENERAL DESCRIPTION
Model C803A. High-quality, 16-watt Model C803A utilizes a post-
mounted tweeter which adds strength to the assembly and provides
an attractive appearance. This coaxial loudspeaker features a 70 Hz-
15.5 kHz, ±5dB frequency response and a broad, uniform dispersion
pattern of 120°. Such provisions allow for highly intelligible sound
reproduction and better distribution for high-quality sound systems.
The C803A combines a full-size 8" (203mm) dia. low-frequency repro-
ducer 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 2.35 oz. (67g) ceramic mag-
net and the unit has a peak sensitivity of 98dB (at 1 watt, 1 meter).
The loudspeaker is available with six different factory-installed line-
matching transformers to meet a variety of project requirements (see
chart below). Model C803A mounts a wide variety of Atlas Sound baffles
and enclosures, with the optimum sealed enclosure size being .36 cu. ft.
C803A
(shown with transformer)
THIELE-SMALL PARAMETERS
Pe: 16 Watts
Fs: 105 Hz
Xmax: .05 in.
Resistance: 6.4 ohms
Qts: .513
Qes: .556
Qms: 6.58
BL: 8.9 N/A
Efficiency: 2.9%
Vas: .507 Ft.3
Sd: 33.1 In.3
Le@1kHz: .74 mH
Mms: .369 oz
Cms: .039 in./lb.
8" COAXIAL LOUDSPEAKER
AVAILABLE WITH TRANSFORMER
C803A
Series

Specifications subject to change without notice
© 2001 Atlas Sound LP Printed in U.S.A. 000501 SL1-1037
1601 JACK MCKAY BLVD. / ENNIS, TEXAS 75119 U.S.A. / TELEPHONE: [phone] / FAX [phone]
Octave Bands Normalized to Zero On Axis
C803A: Frequency Response C803A: Impedance
C803A: Fundamental vs 2nd & 3rd Harmonics
(Raised 20dB) @ 1 watt C803A Frequency Response
Overlay at 0, 15, 30 & 45 degrees
ARCHITECT & ENGINEER SPECIFICATIONS
Unit shall be Atlas Sound 8" dia. loudspeaker Model C803A or loud-
speaker/transformer combination Model ______ (utilizing Atlas Sound
line-matching transformer Model _____). The low-frequency reproduc-
er 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 2.35
oz. (67g) ceramic magnet. The two reproducer sections shall be cou-
pled through a built-in crossover network. The crossover frequency
shall be at 2800 Hz. Frequency response range shall be 70 Hz to
15.5 kHz, ±5dB. Sensitivity shall be 98dB at 1 watt, 1 meter. Voice coil
impedance shall be 8 ohms. 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 _____ (25V, 70.7V, 70/25) with a
frequency response range of _______ and power taps at ____ watts.
Insertion loss shall not exceed ____dB. The maximum depth of the
loudspeaker shall not exceed 27⁄8" (73mm).