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INSTALLATION INSTRUCTIONS
INSTALLATION AND SET-UP FOR
SM8SUB70-B IN-CEILING SUBWOOFER
GENERAL DESCRIPTION
The Atlas Sound SM8SUB70-B is designed for 4 ohm and 70.7V
distributed applications where low frequency enhancement is
desired. This model features a unique compact cabinet design with
multiple
1
⁄4"-20 inserts to allow easy suspension or wall mounting.
The SM8SUB70-B includes a built in 18dB/octave three-pole
passive crossover network coupled to a long-excursion 8"
woofer housed in multi-angle wood enclosure system. The pas-
sive crossover eliminates the need for a separate crossover or
dedicated amplifier to power the speaker.
OTHER FEATURES INCLUDE
• Multiple
1
⁄4"-20 inserts, providing fly points for a variety of
mounting configurations
• Includes internal, high efficiency, 60 Watt 70.7/100V transformer
(may be bypassed for 4 ohm operation)
• Barrier strip input for 70.7/100V/4 ohm or parallel 4 pole Speak-On™
input, (for 4 ohm operation only).
• Unique input panel allows use of standard 4" square box cover
(Raco 753 or eq.) for applications where flex conduit is
required for termination
• Fuse protection
• Attractive, yet heavy-duty grille assembly
• Durable black, rough-coat finish
• Optional bracket for wall mounting
• Omnimount™ compatible
APPLICATIONS
• High-level foreground music systems
• General live sound reinforcement (installed or portable)
UNPACKING
As part of our commitment to providing you the highest quality
product possible we make sure every Atlas Sound product is care-
fully tested and inspected before being shipped from our factory.
Please inspect your loudspeaker for any damage that may have
occurred during shipping. In the event of shipping damage notify
your freight carrier immediately.
AMPLIFIER CONSIDERATIONS FOR 4 OHM OPERATION
Please note: The input barrier strip includes a jumper which when
removed activates the 4 ohm input on the barrier strip and the
Speak-On jacks.
Consult your amplifier owner’s manual to confirm power output at
the rated impedance. Atlas Sound speaker system specifications
list RMS power handling. As a reference, peak power = RMS x
1.414. These ratings should be considered in selecting the best
amplifier to power the speaker system.
For general use, amplifier output should match or exceed the
RMS rated power of the speaker system.
For increased headroom and dynamic reproduction, the amplifi-
er’s output should match or exceed the peak power rating of the
speaker system.
In situations where experienced professionals are operating the
speaker system with proper limiting and frequency control devices
inserted into the signal path and adjusted properly, amplifier out-
put may meet, but should not exceed 2x the RMS power rating of
the speaker system.
HOOK-UP
For 70.7V terminations a barrier strip is provided to accommodate
(2) #14 stranded cables. All tap selections are clearly marked on
the input cup. Connection is made to the common terminal (-) and
the desired power tap (+).
This barrier strip also includes a jumper which should only be
removed to activate the 4 ohm input on the barrier strip and the
Speak-On jacks.
The pins of the 2 Speak-on sockets identified on the rear of the
input panel and are paralleled for connecting additional subwoofers.
Pin 2+ is Positive
Pin 2- is Negative
Pins 1+ and 1- are looped through.
For a worldwide list of Neutrik distributors see http://www
.neutrik.com/
Specifications are subject to change without notice
AtlasSound.com
1601 JACK MCKAY BOULEVARD ENNIS, TEXAS 75119 U.S.A. • TELEPHONE: (800) 876-3333 • FAX: (800) 765-3435
©2003 ATLAS SOUND LP 00803 ATS001614 RevA 8/03 PP
WIDTH
10 " (270mm)
5
/
8
15 " (394mm)
1
/
2
HEIGHT
DEPTH
10 " (264mm)
3
/
8
Side View
<-Front
Front View
SPECIFICATIONS
Model
Power Handling
Transformer Taps
Frequency Response
(+/-6dB)
Sensitivity (1W/1M)
Dispersion
Crossover Type
Crossover Frequency
Woofer
Dimensions
Weight
SM8SUB70-B
100 Watts RMS
7.5, 15, 30, 60
55Hz to 100Hz
89dB
Omni
18dB / Octave
120Hz
8", Four Ohm Long Excursion
15
1
⁄2" H x 10
5
⁄8" W x 10
3
⁄8" D
394mm H x 270mm W x 264mm D
19 lbs. (7.5kg)