RBH Sound C-4x User manual

CTxSeriesCompactSpeakers
O w n e r ’ s M a n u a l
CTx Series pictured
here with the S Series
S-8 Powered Subwoofer

MM-4x
Introduction
Congratulations on your purchase of RBH CTx Series speakers! Your speakers are the result
of many years of research and development dedicated to producing high quality products
for home audio systems.
This manual contains features, setup recommendations and specifications for the RBH CTx
Series speakers. We recommend you thoroughly read through the material contained
in this manual before connecting your speakers. This will ensure you have a good
understanding of how to setup your speakers for optimum performance and allow for
years of listening enjoyment.
Break-inPeriod
Allow 10-15 hours of listening time to adequately break-in the RBH CTx Series speakers.
As the speakers break-in, the driver suspension will loosen. The result of break-in will
be an increase in low frequency response, improved definition, and increased clarity
and detail.
CareandCleaning
To maintain speaker appearance, we recommend wiping them down with a clean and damp,
soft cloth. To clean dust from the grilles, use a vacuum with a brush attachment.
CTxSeriesLoudspeakers
C-4x
1
Features
At the heart of the RBH CTx Series speakers are proprietary aluminum cone midrange
woofers. Aluminum combines stiffness, low mass and self damping properties in a
manner which allows virtually uncolored presentation of program material.
A powerful magnet, extended voice coil and bumped back plate give the high excursion
capability. This ensures accurate dynamic reproduction. Each CTx Series speaker features
CTx Series loudspeakers shown here with partial grilles for a peek at the aluminum cone woofers
and silk dome tweeters. Both the MM-4x and C-4x are available in white and black

2
AttachingSpeakerWires
The CTx Series uses spring-loaded speaker wire terminals to
firmly hold either a pin connector or bare speaker wire. To
obtain a better connection, it is important to slightly tug
on the wires after they have been secured in the terminals.
This will cause the small teeth inside the connectors to
'bite' into the wire. It is recommended that you use wire
which is color-coded or marked on one side. If the distance
is less than 50 feet long from the amplifier or receiver to
the speaker, use 16-gauge or larger wire; if the distance is
more than 50 feet long, use 14-gauge wire.
WARNING: Avoid routing the speaker wire near other electrical
wires, and avoid nailing or stapling the speaker wire.
1. Separate the last 4 inches of the speaker wire conductors
at each end of the wire.
2. Use a wire stripper to remove about ¼-inch of insulation
from the end of each conductor.
3. Twist the ends of each conductor to secure loose strands.
4. Connect the positive wire to the red terminal on the
back of the speaker by pressing down on the red positive
(+) terminal's tab, inserting the end of the positive
conductor, and releasing the tab.
5. Repeat this procedure to connect the negative conductor
to the black negative (-) terminal.
Features
an extensive crossover network. Steep acoustic slope crossovers are used to integrate
drivers. The use of steep crossover slopes allows for higher power handling, minimizes
driver interaction anomalies, and maximizes the ability of each driver in their respective
band of frequencies.
Cabinets are constructed of fiber-reinforced polymer matrix composite. The rounded inte-
riors prevent the “standing wave” effect resulting in clean, uncolored sound. The speakers
virtually disappear leaving only a deep, wide sound stage with pinpoint imaging. The MM-4x
and C-4x has metal keyhole mounts for direct wall mounting as well as female 1/4-inch 20
TPI threads in back and bottom (MM-4x only) for optional bracket mounting.

3
RoomSetupSuggestions
In order to obtain the best possible sound from your speaker system, it is important to
determine where the speakers will sound best in your listening room. Room reflections from
the floor, ceiling and side walls influence the balance, imaging and overall sonic quality
at the listening position. Experiment with speaker placement to determine which location
offers the best overall sound. As a general guide, use the room layout diagram and the
following descriptions when setting up a home theater system. Some speakers shown in
the diagram on the next page may not be applicable to your individual system.
Front Main Speakers
As a starting point, place your left and right front speakers at least 15 inches from the
wall and 7 feet apart from each other. The distance from the listening position to each
speaker should be close to the distance that separates the two main speakers. Angling
the speakers inward towards the listening position may give a more spacious and realistic
sound stage. The MM-4x speakers should be placed on stands which places the tweeters
close to ear height.
Center Channel Speaker
The C-4x Center Channel Speaker should be placed between both left and right main
speakers. Often this positioning dictates placing the speaker either directly above or
below a television monitor.
Surround Speakers
The Surround Speakers may be placed either above, behind or to the sides of the listening
position. The listening position should be centered between the surround speakers. For
best performance, you may want to experiment with angling the surround speakers either
towards or away from the listening position.
Subwoofer
Placement of the subwoofer will largely determine quality, quantity, and extension of the
bass frequencies within your listening room. Bass frequencies are reinforced by close room
boundaries. Placing the subwoofer in a corner will make the subwoofer sound louder and
boost the very lowest frequencies. Placing the subwoofer away from walls will provide
the least reinforcement, making the bass sound subjectively thinner than if the woofer
were close to a wall. Good results can usually be obtained by placing a subwoofer along a
wall 1-3 feet from a corner. Experiment with subwoofer placement and the sub-amplifier
controls to achieve the proper bass balance.

4
RoomSetupSuggestions(continued)
NOTE: There are several different surround formats available. Dolby Pro-Logic, Pro-Logic II, Dolby Digital and
DTS generally have a 5 speaker plus subwoofer requirement. Dolby Digital EX and DTS ES add a center rear
speaker or Dolby TrueHD and DTS Master HD which is 7.1 format. Please consult your audio/video professional
to determine which system is best for you and how many speakers you will require.

5
Specications
Model
Speaker Type:
Frequency Response:
Sensitivity
Recommended Power:
Woofer:
Tweeter:
Crossover Frequency:
Crossover Slope:
Impedance:
Finish/Color:
Grille Color:
Dimensions:
Weight:
MM-4x
Bookshelf
100Hz-20kHz ±3dB
85db (2.38V @ 1M)
20-100 Watts
(1) 4” (102mm) Aluminum Cone
(1) 1” (25mm) Silk Dome
3,000 Hz
12dB/Octave
8 Ohms
Black or White Satin
Black or White Fabric
Width: 5-1/4” (133mm)
Height: 7-1/2” (191mm)
Depth: 4-3/4” (121mm)
3.1 lbs. (1.41 Kg)
C-4x
Center/LCR (Left, Center or Right)
100Hz-20kHz ±3dB
88db (2.38V @ 1M)
10-100 Watts
(2) 4” (102mm) Aluminum Cone
(1) 1” (25mm) Silk Dome
3,000 Hz
12dB/Octave
6 Ohms
Black or White Satin
Black or White Fabric
Width: 14” (356mm)
Height: 5” (127mm)
Depth: 4-1/2” (114mm)
6.5 lbs. (2.95 Kg)
No sound from
speakers
No sound from
one speaker
Very little bass
and/or imaging
Speaker wire not connected
Speaker selector on amplifier is
not on
Balance control on receiver
or pre-amp is not centered
Speaker wire not securely
connected
Speakers are wired out of phase
Make sure wire is connected
at both the speaker and the
amplifier observing proper
polarity
Activate proper selector on
amplifier
Place balance control in the
center
Check all connections at
amplifier and speakers
Check entire system for proper
polarity and make adjustments
as necessary
Troubleshooting
Probable Cause: Solution:
Situation:

6
Warranty
Your RBH Sound CTx Series speakers are covered by a limited warranty against defects in
materials and workmanship for a period of 5 years from the original date of purchase.* 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.
* The CTx Series speakers are not intended for outdoor use. If used outdoors it is at owner’s discretion
and this warranty is void.

382 Marshall Way, Layton, Utah • USA • 84041
Toll Free: [phone] • Fax: [phone]
rbhsound.com
It is RBH Sound policy to continuously incorporate improvements into our products; all specifications are subject to
change without notice. Copyright ©2013 RBH Sound. All Rights Reserved.
Redening the Way You Experience Sound.TM