RBH Sound Speaker A 615 70 User Guide

COMMERCIAL LOUDSPEAKER  
O W N E R S  
M A N U A L  
OM-70, rev.1.0  
 
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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