Atlas Sound C12BT60 - Manual

Specifications subject to change without notice

© 2002 Atlas Sound LP

01002

ATS001417 RevB 10/02

SL1-2020

2.37

One

1601 JACK MCKAY BLVD. / ENNIS, TEXAS 75119 U.S.A.
TELEPHONE: (800) 876-3333 / FAX (800) 765-3435

AtlasSound.com

12" COAXIAL LOUDSPEAKER WITH TRANSFORMER

C12BT60

FEATURES

• Professional quality sound reproduction at a competitive price
• Includes factory-installed line-matching transformer
• Ideal for multi-purpose commercial, industrial and institutional use
• Mounts a wide selection of Atlas Sound baffles
• Coaxial loudspeaker with 12" diameter low frequency and

1" diameter high frequency reproducer

APPLICATIONS

Enhance audio quality and listener appreciation of engineered sound
systems with the superior sound reproduction and power handling
capacity of the Atlas Sound Model C12BT60. Professional quality 12"
coaxial loudspeaker with factory installed 60-watt line-matching trans-
former is ideal for application in restaurants, night clubs, lounges, the-
aters, airports, waiting rooms, shopping malls, houses of worship or any
commercial, industrial and institutional application, with high ceilings.

GENERAL DESCRIPTION

Atlas Sound Model C12BT60 is a professional quality coaxial loudspeak-
er for use where full range music and voice reproduction are desired.
Model C12BT60 combines a 12" diameter low frequency reproducer and
a 1" diameter high frequency, post-mounted reproducer. The unit features
a curvelinear, treated paper cone for lower harmonic distortion and a
built-in crossover network for determining proper frequency selection
between the two reproducers. Both the low frequency reproducer and the
tweeter feature permanently aligned voice coils (1.5" and 1" diameter,
respectively) to assure distortion free performance.

The copper voice coils have an anodized aluminum former. The com-
petitively priced unit assures smooth frequency response in a high
power handling mode. For best results, enclosures with a volume of 2
cu. ft. or greater (including Atlas Sound Models Q4412 or Q4612) are
recommended. Additional Q Series enclosure models with a volume
up to 6 cu. ft. will satisfy requirements with different low frequency
emphasis. The loudspeaker will also provide outstanding performance
when front or rear mounted in vented or sealed enclosures. A factory
installed 60 watt line transformer is included with the package, however,
the transformer can be easily bypassed for 8 ohm applications.
Amplifier output wiring connections to the loudspeaker are "pig tail"
leads loudspeaker weight is 10.5 lbs (4.76kg).

ARCHITECT & ENGINEER SPECIFICATIONS

Frequency response range shall be 68Hz to 15kHz, ±3dB in full
space anechoic environment when mounted in a 2 cu. ft. enclosure.
Sensitivity shall be 95dB at 1 watt, 1 meter. Voice coil impedance
shall be 8 ohm (nominal). Low frequency voice coil diameter shall be
11⁄2" (38mm). High frequency voice coil diameter shall be 1" (25mm).
The maximum depth of the loudspeaker shall not exceed 4.1875"
(106mm). Basket shall be made of cast metal. Loudspeaker shall be
capable of front and rear mounting in sealed or vented enclosures
and weigh 10.5 lbs (4.76kg). The low frequency reproducer cone shall
be a full 12" (305mm) in diameter and the high frequency reproducer
diaphragm shall be 1" (25mm) in diameter. The woofer shall have a
30oz. (.85kg) ceramic magnet. The tweeter shall have a 10 oz.
(.283kg) ceramic magnet. The two reproducer sections shall be cou-
pled through a built-in crossover network. The crossover frequency
shall be at 2750Hz. Conical dispersion shall be 90 degrees at 2kHz.
Unit shall include factory-installed line transformer. Transformer pri-
mary voltage shall be 70.7V or 100V with a frequency response range
of 33Hz to 21kHz (±2dB) and power taps at 7.5, 15, 30 & 60 watts.
Insertion loss shall not exceed 1dB.

12" Full Range Coaxial Speaker System

Frequency Response (±10dB)

40Hz to 20kHz

Frequency Response (±3dB)

68Hz to 15kHz

*Power Handling

100 Watts

**Sensitivity 1W/1M

95dB

Max. SPL @ 1M

(Transformer Limited @ 60W)

113dB

Nominal Impedance

8ohm

Crossover Frequency

2750Hz

***Dispersion Angle

90 Degrees

LF TRANSDUCER

Basket Material

Cast Aluminum

Cone Material

Treated Paper

Surround Material & Dampening

Treated Accordian Cloth Edge

Voice Coil Diameter

1.5" (38mm)

Magnet Weight

30 oz. (.85kg)

HF TRANSDUCER

Diaphragm Material

Treated Laminated Silk

Voice Coil Diameter

1" (25mm)

Voice Coil Former Material

Aluminum

Voice Coil Material

Copper

Magnet Weight

10 oz. (283g)

Top Plate Thickness

0.125" (3mm)

Transformer

Frequency Response: 33Hz to 21kHz (±2dB)

Primary Taps @ 70.7V: 60,30,15,7.5

Maximum Insertion Loss 1dB

Diameter & Depth

12.875" (327mm) Dia. & 4.1875" (106mm) Deep

Mounting Dimensions

11.625" (295mm) Bolt Circle

Net Weight (Less Transformer)

10.5 lbs (4.76kg)

Warranty

5 Years

Recommended Enclosure For Maximum
Low Frequency Performance****

Atlas Sound Q4412 (2 Ft

3

, .054m

3

)

*

Rated power based on EIA specification -

**

Averaged from 500 Hz to 2.5 kHz

***

Dispersion angle = 6dB down point at 2 kHz

****

When used in full space anechoic with the Atlas Sound Q4412 two cu. ft. enclosure the
C12BT60 operates within a frequency response range of 68 Hz - 20 kHz (±3dB). Sensitivity
is 95dB (1W/1M). Dispersion angle is 90° @ 2kHz.

C12BT60

(Front View) (Rear View)