The Back - Behringer A500 User Manual

REFERENCE AMPLIFIER A500
+
Each channel features a volume control. Use it to adjust
gain on your A500. Both volume controls should be turned
all the way to the left whenever you power the unit up or
down. If an active signal is present on the input, turning the
volume down will protect your speakers and your ears
from unwanted “pops” or transients.
The PROT LED lights up whenever the protective circuitry
mutes the speaker output. Please turn your A500 off
immediately whenever this LED is lit.
7
8
CHANNEL INPUT 1 (MONO). Connect the signal source
whose output needs to be amplified.
+
Here you will connect an output of your mixing console,
your HiFi preamp or another signal source.
Our rack mixing console EURORACK PRO RX1602, with its
eight mono-usable balanced stereo channels, is an ideal
choice for signal processing and source selection.
The connections for both channels are laid out as RCA,
XLR and 1/4" TRS stereo connectors. The cinch inputs are
intended for use with outputs laid out as unbalanced signals
with a -10 dBV line signal level. Because these inputs are
more sensitive than others, you can directly connect a CD
player or a DAT recorder. Of course this input can also be
used for connecting mixing consoles and similar equipment.
The XLR and 1/4" TRS stereo connectors are laid out
balanced, but they too can of course be used to connect
unbalanced signals. Their sensitivity is +4 dBu (also see
ch. 4).
Generally speaking, you should choose balanced over
unbalanced signals in order to guarantee the highest noise
protection.
Due to safety considerations, the inputs can not be used
in parallel. However, if you are using cinch and XLR or
1/4" TRS connectors simultaneously, the cinch input is
given preference, and the other signal is muted.
+
CHANNEL INPUT 2. These are the inputs for channel 2.
6
All manuals and user guides at all-guides.com
+
+

2.2 The back

9 10
Fig. 2.2: Control elements and connections in the back
+
+
2. CONTROL ELEMENTS
The high-precision power indicator gives out current signal
strength.
The CLIP LED lights up when the signal is distorted. Should
distortion occur, reduce the input level, so that the CLIP
LED no longer lights up.
11 12
13
The STEREO/BRIDGED MONO switch is used to toggle
between the two operating modes of your A500.
OUTPUT 1, OUTPUT 2 and BRIDGED MONO: These are
the speaker connectors of your A500 laid out as
1/4" TS mono connectors. When in mono-bridged mode,
only use the BRIDGED MONO output.
In addition to XLR or 1/4" TRS connectors, you can also
use binding posts for connecting speaker cables. When in
mono-bridged mode, make sure to connect your cables to
both middle connectors–as shown on the unit itself.
FUSE SWITCH/VOLTAGE SELECTION. Before connecting
the unit to the mains, please check if the voltage selector
corresponds to your local voltage. When replacing fuses,
you should only use fuses of the same type and rating. With
some units, the fuse switch can be put into two different
positions in order to select between 230 V and 120 V
operation. Please bear in mind: If you wish to use your
equipment outside of Europe running on 120 V, you will
have to use a fuse with a higher Ampere value.
The mains connection is made via a standard IEC
RECEPTACLE. A matching cable is enclosed.
SERIAL NUMBER.
6