COMMERCIAL LOUDSPEAKER
O W N E R S
M A N U A L
OM-70, rev.1.0
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I N T R O D U C T I O N
ongratulations on your purchase of an RBH loudspeaker system! Your
speakers are the result of many years of research and development
dedicated to producing high quality products for home audio and audio/video
systems.
This manual contains features, installation procedures and specifications for
Commercial 70 Volt loudspeaker system. We recommend that you thoroughly
read through the material contained in this manual before connecting your
loudspeakers. This will ensure that you have an understanding of how to
install the speakers for optimum performance.
B R E A K I N P E R I O D
lan on giving your speakers 10-15 hours of playing time to adequately
break in. As the speakers break in the driver suspension will loosen
up. The result will be an increase in low frequency response, improved definition,
clarity and detail.
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F E A T U R E S
BH Commercial loudspeakers consist of two models, the A-615-70 and
the MC-615-70. Both models incorporate metal enclosures to reinforce
bass frequencies allowing a deeper and more controlled bass response. Both
models also utilize an acoustic suspension design and offer operation in either
8 Ohm or 70 volt modes.
A powerful magnet, extended voice coil and bumped back plate give the
bass/midrange drivers high excursion capability. This ensures accurate
dynamic reproduction. The MC-615-70 uses a proprietary aluminum woofer
and tweeter. The special aluminum cone material combines stiffness, low
mass and self damping properties in a manner that allows virtually uncolored
TM
presentation of program material. Both tweeters feature Ferro Fluid liquid
cooling to allow greater power handling.
Steep acoustic slope crossovers are used to integrate drivers. The use
of steep crossover slopes allows high power handling, minimizes driver
interaction anomalies, and maximizes the clarity with which each driver is able
to produce its respective frequency band. Sophisticated computer modeling
techniques are used extensively in the RBH loudspeaker design process.
A switch connected to the tweeter allows you to custom tailor the sound to
your tastes. This switch is located next to the woofer on the front baffle of the
speaker and has three positions: +3dB, 0, -3dB. The +3 position increases
output of the tweeter, the -3 position decreases the output of the tweeter rela-
tive to the woofer. The 0 position is the factory setting and generally provides
the most natural response from the speaker.
The use of a 70 volt transformer allows many speakers to be used
together by running a connecting wire from one speaker to the next,
without concern for the impedance seen by the amplifier. A 70 volt
amplifier must be used to accomplish this. Please refer to the following
pages for instruction and wiring diagrams to properly install a 70 volt system.
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THE REMOVABLE CONNECTOR
his connector detaches from the main housing of the speaker for ease
in connecting the speaker wire. The bare wire must be inserted and
securely fastened by tightening the screws. The connector has 4 terminals
as shown in the diagram below.
OUT
IN
IN
OUT
Positions 2 and 3 are inputs from either the amplifier or a previous speaker.
They are the same inputs used for 8 Ohm operation. Positions 1 and 4 are
outputs to succeeding speakers in 70 volt operation. We suggest carefully
reading the WIRING DIAGRAM section of this manual to determine the best
wiring scheme for your particular installation.
This removable connector will accept a maximum wire gauge of 14 AWG and
a minimum wire gauge of 18 AWG. Please refer to the NEC (National Elec-
trical Code) for further information regarding the permissable wire size.
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W I R I N G D I A G R A M S
Parallel Connection
onnect the speaker wire going to succeeding speakers to positions 2 and
3. If needing to service system, this will allow the removable connector
to be removed from the speaker with all other speakers in the line continuing
to play and operate normally. This diagram is shown here:
Loop Thru
ositions 1 and 4 are internally connected to positions 2 and 3 respectively.
This allows connections to succeeding speakers using positions 1 and 4.
If needing to service the system, removing the removable connector from one
speaker will cause all succeeding speakers to stop playing. This diagram is
shown here:
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VOLTAGE SELECTOR
s previously mentioned, the A-615-70 and MC-615-70 can be used in
a 70 volt system or as a standard 8 Ohm in-ceiling loudspeaker. The
voltage selector knob allows you to properly set the speaker to 8 Ohm operation
or to choose from 2, 4, 8, 16 and 32 Watt taps in 70 volt operation.
In 70 volt operation, be sure to appropriately set the selector according to the
power output of the amplifier being used and the number of speakers being
installed. In 8 Ohm operation, be sure to set the selector to the 8 Ohm setting.
A picture of the voltage selector (set to 8 Ohms) is shown below.
S T R A I N R E L I E F
he pictures below depict the proper way to insert and tighten down the
wire in the strain relief fitting.
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SAFETY COMPLIANCE
UL LOGO
omplies with the requirments of UL-2043 fire tests for heat and visible smoke
and visible smoke release for discrete products and the accessories installed
inairhandlingspaces,NFPA-70NationalElectricCode2002,Article300-22(C),and
NFPA-90A installation of air conditioning and ventilation systems, Section 2-3.10.1
(a), Exception 3. Listed UL1480 Speakers for Professional/Commercial use.
CE LOGO
hese products are in compliance with the EMC Directive 89/336/EEC
and Article 10 (1) of the directive. In compliance with Technical Reg-
ulations EN55013-1 and EN50082-1.
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S P E C I F I C A T I O N S
8 Ohm Operation
A615-70
MC615-70
Frequency Response:
Sensitivity:
55Hz - 20kHz
50 Hz - 20kHz
90 dB 1 watt/1 meter
20 - 80 Watts
50 Watts
88 dB 1 watt/1 meter
20 - 120 Watts
50 Watts
Recommended Amplifier Power:
Maximum Power Handling:
Drive Units:
1 1” silk dome tweeter
1 6.5” polypropylene woofer
1 1” aluminum dome tweeter
1 6.5” aluminum cone woofer
Crossover Frequency:
Filter Slope:
3000 Hz
3000 Hz
12 dB/octave
8 Ohms
12 dB/octave
8 Ohms
Impedance:
Finished Dimensions:
10.25” Diameter
9.5” Depth
10.25” Diameter
9.5” Depth
Cutout Dimensions:
Weight:
8.75” Diameter
8 lbs.
8.75” Diameter
8 lbs.
70 Volt Operation
A615-70
MC615-70
70 Volt Taps:
2, 4, 8, 16, 32 Watts
2, 4, 8, 16, 32 Watts
It is the policy of RBH Sound to continuously incorporate improvements into products.
All specifications are subject to change without notice.
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I N S T A L L A T I O N
IMPORTANT:
This product must be installed in accordance with your local area’s building
codes and regulations. This may require use of an additional support bracket,
depending on the installation. In this case, use the MBR-70 described below.
SEISMIC TAB:
For proper installation, the seismic tab MUST be secured to a secondary
support in the event of failure of the primary support structure.
MBR-70: (sold separately)
The MBR-70 consists of a round bracket and two rails designed to be used
with suspension ceilings. The rails will fit either 24” or 600mm tiles. They are
designed to rest on top of the tile without the “V” end of the rail grabbing the
grid struts. In the event that the tile falls, the “V” end of the rail will grab the
strut holding the speaker in place. The MBR-70 is not required for installation
when the speaker is being installed in drywall or other rigid material. When
installing in these surfaces, use attached swivel mounts and hole locating
template included in the box with each loudspeaker.
For suspension ceiling installation instructions, refer to the installation
manual included with the MBR-70.
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W A R R A N T Y
our RBH Sound Commercial loudspeaker is covered by a limited
warranty against defects in materials and workmanship for a period
of 25 years from the original date of purchase. This warranty is provided by
the authorized RBH Sound dealer where the loudspeaker was purchased.
Warranty repair will be performed only when your purchase receipt is
presented as proof of ownership and date of purchase. Defective parts
will be repaired or replaced without charge by your dealer’s store or the location
designated by your dealer that is authorized to service RBH products. Charges
for unauthorized service and transportation cost are not reimbursable under
this warranty. This warranty becomes void if the product has been damaged
by alteration, misuse or neglect. The warrantor assumes no liability for
property damage or any other incidental or consequential damage
whatsoever which may result from the failure of this product. Any and
all warranties of merchantability and fitness implied by law are limited to
the duration of this express warranty. Some states do not allow limitations
on how long an implied warranty lasts, so the above limitations may not apply
to you. Some states do not allow the exclusion or limitation of incidental or
consequential damages, so the above limitation or exclusion may not apply
to you.
RBH Sound, Inc.
976 N. Marshall Way • Bldg. 2, #4 • Layton, Utah • USA • 84041
Copyright © 2003, RBH Sound, Inc. All Rights Reserved
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R E D E F I N I N G T H E W A Y Y O U E X P E R I E N C E S O U N D
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