SP2400 – 21
Press the
OFF
button to select the
MIC/LINE
INPUT
. Adjust the
MASTER VOLUME
control by
pressing the up/down buttons so the meter
indicates a level at the “
0
” mark. With all music
sources off, speak into the mic with a normal voice.
Adjust the
MIC/LINE INPUT GAIN
control with a
non-conductive alignment tool so that the meter
indication is near the "
0
" mark. This provides the
best signal-to-noise ratio for the mic and insures
that its relative volume
will be equivalent to the
program sources.
Using the EQ
Each local
MIC/LINE INPUT
has a 2-band
equalizer for adjusting the lows or highs on the
microphone signal. When the controls are set to
“
U
” (unity), the EQ has no effect on the signal.
Using the PRE OUT/AMP IN Connections
The
PRE OUT
and
AMP IN
connectors are
provided to give you more flexibility in your system
design. The SP2400 is shipped with U-shaped
jumpers installed between the
PRE OUT
and
AMP
IN
jacks. This routes the signal from the output of
the preamplifier stage to the input of the amplifier
stage.
This also provides a point in the signal chain to
insert an external signal processor. Simply connect
the line-level signal from the
PRE OUT
jack to the
input of the processor, and connect the line-level
output from the processor to the
AMP IN
jack on
the SP2400.
Another option that is available is to connect
another amplifier into the system. Simply use a
Y-cord at the
PRE OUT
jack to split the signal
between the
AMP IN
jack and the input jack on an
external amplifier.
LEFT and RIGHT OUTPUTs
The amplifier outputs on the SP2400 can be
used with an 8-ohm impedance load, or to directly
drive a 70V or 100V distributed system (also called
constant-voltage systems).
Direct Speaker Connection
If the SP2400 is not being used in a distributed
speaker system, you can reconfigure the amplifiers
to drive an 8-ohm load. Each amplifier can provide
up to 250 watts into an 8-ohm load. See the
"Internal Settings" section on page 14 for
instructions on how to reconfigure the amplifiers.
Distributed Speaker System
When using the SP2400 in a 70V or 100V
system, connect the speaker outputs directly to the
distributed system. The SP2400 can directly drive a
distributed system's speaker line without the need
for an output transformer. The SP2400 can supply
up to 200 watts into a 70V or 100V distributed
system. Make sure the taps on the speakers in
the system do not exceed a total of 200 watts.
Using the REMOTE Connection
The optional SP2400 Remote Control (SP-41R)
provides Input Selection and Master Volume control
for each amplifier or zone. The Remote Control can
be mounted in a standard double-gang electrical
box and covered with a Decora
®
-style faceplate.
3
0
3
6
9
15
30
55
Connecting One or More Remote Controls
Each Remote Control affects only the zone to
which it is connected. Up to ten remote controls
may be connected to each zone simultaneously.
This allows controls to be conveniently placed.
Each control will interact with the SP2400, and all
controls will reflect the current source and level
settings. Note that the remote control indicates the
gain setting and not the actual signal level in real
time. In addition, the SP2400 provides a method for
controlling two independent zones using a single
Remote Control by assigning them to the same
AMP ADDRESS
(see next section).
The maximum distance between the remotes
and the SP2400 varies, depending on the type of
cable selected and the number of remote controls
used. Typically, a lower wire gauge and cable
capacitance allow longer distances. See the instruc-
tions with the remote control for more information.
