RBH Sound SA-200 User Manual
SA-200 / SA-400
High-Performance Subwoofer Amplier
O w n e r ’ s M a n u a l
Introduction
Congratulations on your purchase of an RBH Sound Subwoofer Amplifier!
Your RBH Subwoofer Amplifier is the result of many years of research and
development dedicated to producing high quality power amplification for
home audio subwoofer systems.
This manual contains operating procedures for the RBH SA-200 and SA-400.
It is recommended you thoroughly read the material contained in this manual
before making any connections to your subwoofer amplifier. This will ensure
you have a good understanding of how to set-up and operate your subwoofer
amplifier for optimum performance.
Front Panel
The following are descriptions of the front panel functions (refer to figure 1).
NOTE: When buttons are pushed in they are in the “on” position.
1. Power Button: This button allows the amplifier to be turned on and off
manually or when kept in the “on” position and the Auto Button (see
figure 1, #2) is kept in the “on” position; the amp will automatically turn
on when it detects an incoming audio signal. The power indicator light
above the power button will glow when the amplifier is on.
IMPORTANT! The volume control should be set at the minimum setting
(all the way counter-clockwise) before plugging the amplifier into an
A/C wall outlet.
2. Auto Button: This button, when in the “on” position, allows the amplifier
to automatically turn on when there is an incoming audio signal present
at either the “Line” inputs or “From Receiver/Speaker Level” inputs. For
this function to work properly, the Power Button must be left in the
“on” position. The light above the Auto Button will glow when the unit
is in “standby” mode. No other lights will glow.
3. Boost: This button, when in the “on” position, will increase output at 25Hz
by 4dB. Use this button with discretion and caution as some subwoofers
may not be able to handle this extra boost. RBH does not recommend using
this feature with the following RBH products: SI-10, TS-10AN, or MCS-88.
4. Phase Control: This knob changes the output phase of the amplifier.
Changing the phase will change the way the subwoofer(s) and main
speakers interact with each other at the crossover frequency. Typically,
this will be set to the 0° position. To operate, press then release the phase
button. While it is extended, adjust as necessary if any problem between
the subwoofer and main speakers exist. Press the button back in.
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Front Panel (continued)
5. Crossover: This button allows the amplifier’s internal low-pass filter to
be defeated when using an external crossover, or when the crossover is
not needed. When defeated (off), the subwoofer output will play the
full-range of the audio signal. This button has no effect on the high
level inputs and outputs shown in figure 2, #10 and #11. The high level
output (figure 2, #10) has a 100Hz high pass filter and is not adjustable
or defeatable.
6. Crossover Frequency Control: The var iable crossover frequency
control allows you to set the point of the low-pass frequencies being
reproduced by the amplifier anywhere from 40Hz-180Hz. Try an initial
setting of the crossover frequency control at the midway (12 o’clock)
setting. Increasing the crossover frequency will produce more mid-bass
output from the amplifier.
7. Master Volume Control: This dial allows you to adjust the output level
of the subwoofer to match the audio system. For an initial setting, turn
the volume control up one quarter of a turn (9 o’clock) position). The
volume control may be adjusted while listening to match the subwoofer
output level with the rest of the system.
REMINDER–The volume control should be at the minimum setting (all the way
counter-clockwise) before plugging the amplifier into an A/C wall outlet.
Figure 1 Front Panel View
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Rear Panel
The following describes the control functions of the rear panel of the
amplifier (refer to figure 2).
8. Line/LFE Input : These RCA type terminals are for the pre-amp
level input signals coming from a processor or preamplifier labeled
“subwoofer” or “LFE.”
IMPORTANT! Use either the Line Level inputs or the “Speaker Level”
inputs separately. DO NOT use both, as damage to the receiver and/or
the Subwoofer Amplifier may result.
WARNING! DO NOT connect an amplified or speaker-level signal into
the line/LFE input(s).
9. Line/LFE Output: These RCA type terminals carry the same audio signal
as the line inputs. These terminals are used if an output signal is needed
elsewhere in your system. These outputs are full-range outputs.
10. Speaker Level Output: This 100Hz high-pass speaker output is for your
satellite/main speakers. The built-in crossover limits the frequencies
below 100Hz from being sent to your satellite/main speakers. You may
use these speaker outputs only when using the “Speaker Level” input
terminals (#11). Connect your satellite/main speakers (observing the
proper polarity) to the binding posts labeled “Speaker Level Out.”
NOTE: These connectors are not powered by the Subwoofer Amplifier.
11. Speaker Level Input: These connectors are for the amplifier or speaker-
level audio output from an amplifier or receiver.
IMPORTANT! Use either the Line inputs or the “Speaker Level” inputs
separately. DO NOT use both, as damage to the receiver and/or the
Subwoofer Amplifier may result.
12. Subwoofer Output: This is the amplified audio output of the Subwoofer
Amplifier. If the Crossover Button (#5) is in the “on” position, the audio
output will be limited to the lower frequencies selected by the Frequency
Control (#6). If the Crossover Button (#5) is in the “off” position, the
audio output will be full-range. An impedance load of 4-16 ohms may be
connected to this output. Please follow the instructions in the connections
section of this owner’s manual for proper wiring information.
13 Dimmer: This knob adjusts the brightness of the indicator lights on the
front panel.
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