A-605/70
In-ceiling 2-way Speaker
(8 Ohm 70/100 Volt Ready)
O w n e r ’ s M a n u a l
Features
The A-605/70 is the budget-minded answer for both residential and commercial
in-ceiling speaker applications. The A-605/70 employs an 6½-inch polygraphite
woofer cone and a ¾-inch soft swivel dome tweeter for great sound on a budget.
Other amenities include a UL listed integral rear enclosure and a built-in multi-tap
transformer, enabling the A-605/70 to be used with either 8 Ohm or 70/100 Volt
audio systems. The A-605/70 provides full-range performance while exceeding
building code compliance. The metal enclosure reinforces bass frequencies allowing
a deeper and more controlled bass response. A powerful magnet, ensures accurate
dynamic reproduction.
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 Sound speaker 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, 0dB, -3dB. The +3dB position increases output of
the tweeter, the -3dB position decreases the output of the tweeter relative to the
woofer. The 0dB position is the factory setting and generally provides the most
natural response from the speaker.
The use of a 70/100 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 70/100 volt amplifier must be used to accomplish this.
WARNING: Refer to the installation and wiring diagrams sections to properly install
a 70 volt system.
Installation
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. The speaker
has been encased in a back can with the
terminals on the outside of the back can
for easy installation.
1. To install the wire push the end of
the binding post in and run the wire
into the hole on top of the terminal,
then release the terminal to securely
attach wire to the speaker.
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Installation (continued)
NOTE: The binding posts will accept a maximum wire gauge of 14 AWG and a
minimum wire gauge of 18 AWG. Please refer to the NEC (National Electrical Code)
for further information regarding the permissible wire size.
2. Install speaker into the ceiling.
NOTE: Carefully tuck the speaker wires up
into the ceiling so they
do not get pinched.
3. Set the three switches located on the
face of the speaker to the proper setting
according to the installation, see the
guidelines below:
A: The A-605/70 can be used in a 70/100
volt system or as a standard 8 Ohm
in-ceiling speaker. To properly set the
speaker to a 70/100 volt system or as a
standard 8 Ohm operation slide the switch to the proper position on the face
of the speaker.
NOTE: In 70/100 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.
B: Slide the switch into the proper position in order to choose from 2, 4, 8 and
16 Watt taps in 70/100 volt operation.
C: To customize the sound of the tweeter slide the switch located on the front
baffle of the speaker to either: +3dB, 0dB, -3dB.
A: Switch for 70/100 Volt
or 8 Ohms Operation.
B: Switch for Watt Taps in
70/100 Volt Operation.
C: Switch for Tweeter
Adjustment.
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Wiring Diagrams
CAUTION: If your amplifier isn’t capable of handling the impedance of all connected
speakers, this may result in overloading the amplifier and may cause possible damage
to the amplifier. Check your amplifier’s documentation for proper impedance levels.
Parallel Connection
A parallel connection exists when speakers are connected directly to an amplifier (as
shown in the illustration below). Each speaker’s positive terminal is connected to the
amplifier’s positive terminal, and each negative terminal is directly connected to the
amplifier’s negative terminal. This type of connection should be made when using a
70/100 Volt amplifier as shown in the diagram below.
NOTE: In this example, each speaker is set to 70/100 Volt operation and is being
powered by a 70/100 Volt amplifier. Make sure to properly select 70/100 Volt or 8 Ohm
operation before connecting the speakers to the amplifier.
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Specifications
Model:
A-605/70
Architectural
Series:
In-ceiling 2-way Speaker (8 Ohm or 70/100 Volt Ready)
88Hz-20kHz 3dB
System Type:
Frequency Response:
Sensitivity:
88dB (2.83V/1 meter)
2-60 Watts
Recommended Power:
Woofer(s):
(1) 6½” (165mm) Polygraphite Cone
(1) ¾” (19mm) Silk Dome Swivel
3,000 Hz
Tweeter(s):
Crossover Frequencies:
Crossover Slope:
Impedance:
12dB/Octave
8 Ohm or 70/100 Volt
White Frame (paintable)
White Aluminum (paintable)
8” (203mm) Dia.
Cabinet/Color:
Grille:
Cutout Dimensions:
Finished Dimensions:
9-1/8” (232mm) W
4-1/2” (114mm) D
4 lbs. (1.81 Kg)
Weight:
25 Years (Warranted from date of purchase to be free from defects and workmanship.)
Warranty:
70/100 Volt Operation
70/100 Volt Taps
2, 4, 8 and 16 Watts
Troubleshooting
Situation
Probable Cause
Solution
No sound from speakers.
Speaker wire not connected.
Make sure wire is properly
connected at both the
speaker and the amplifier
observing proper polarity.
Speaker selector on amplifier Activate proper speaker
is not on.
selector on amplifier.
No sound from one speaker.
Balance control on receiver
or preamp is not centered.
Place balance control in
the center.
Speaker wire not completely
connected.
Check all connections at
amplifier and speakers.
Very little bass and/or
imaging.
Speakers are wired
out of phase.
Check entire system for
proper polarity and make
adjustments as necessary.
Warranty
Your A-605/70 In-ceiling 2-way speaker is covered by a limited warranty against
defects in materials and workmanship for a period of 25 years. This warranty is
provided by the authorized RBH Sound dealer where the speaker 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 RBH Sound
authorized to service RBH Sound 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. RBH Sound
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.
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382 Marshall Way, Layton, Utah • USA • 84041
Toll Free: (800) 543-2205 • Fax: (801) 543-3300
It is RBH Sound policy to continuously incorporate improvements into our products; all specifications are subject to change without notice.
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