3
‘Mono’ or ‘Mono/Bridged’. In the latter mode, the
maximum output power is 150 watts. Please note
that ‘R-Channel’ input is accepted under the
bridged operation. Bridging is ONLY recom-
mended when 8 Ohm speakers (or greater imped-
ance) are used.
Music
With the LDS2/75’s trigger switch in the ‘music’
position, it will automatically function once it re-
ceives a music signal and will move into its standby
mode whenever the signal is absent for approxi-
mately five minutes. It will reactivate immediately
a signal is again received.
12 Volt Trigger
With the switch in the 12V position, the LDS2/75
can be turned on from a ‘standby’ state whenever a
6V to 15V input signal appears at the 12V input
connector.
12 Volt Connector
For 12V trigger input and output use the upper two
circuits marked ‘+IN-’ for 12V trigger input (to turn
on the LDS2/75 amplifier) and use the lower two
circuits marked ‘-Out+’ for trigger output. The in-
put accepts only a continuous DC trigger signal
from 6V minimum to 15V maximum for turning
on the LDS2/75 amplifier.
The trigger output is capable of delivering a con-
tinuous 12V, 30 mA of DC current to drive the
down-stream products (or multiple units of LDS2/
75 amplifiers) that may be associated with the
LDS2/75 amplifier.
NOTE: If the music is discontinued for longer
than 5 minutes, the LDS2/75 will automatically
enter its sleep mode to cut down on energy con-
sumption. The front blue LED will then ‘dim’ to
indicate that the amplifier is in ‘Sleep’ and will
only return to its full luminance when it again
receives a music signal.
LDS LED
This important control indicator is provided to in-
dicate the correctness of your speaker connections
and to indicate that the intended speaker load is
not too great for the amplifier.
Speakers 1 and 2
These are the speaker-out terminals that are con-
nected with the cables from the loudspeakers.
Power Switch
Normally once you have switched on the amplifier
the signal sensing mode or the 12 volt trigger switch
will ensure that the amplifier goes into a ‘sleep/
standby’ mode whenever it is not being directly
used.
Protection Features
Your LDS2/75 includes some important circuits
that are designed to protect the amplifier.
LDS (Load Detection System)
The LDS feature is a patent pending circuit that
prevents ‘bad’ speaker connections to be made that
could cause the amplifier to ‘short’.
Fig. 2. Rear panel view
LINE
SPEAKER
INPUT
L
R
LINE
OUTPUT
(BUFFERED)
LEVEL
LO
HI
LDS LED
SEE
BELOW
1
2
SPEAKERS
L
R
+
+
12V
POWER
120V 60Hz 3A
27
5
T
E
C
H
N
O
LO
G
IE
S
,
IN
C
.
Sh
er
bo
ur
n
STEREO
BRDG
MONO
MODE
OUT
IN
+
+
L
R
+
+
MUSIC
TRIGGER
VOLUME
MIN
MAX
POWER
Sherbourn
Fig. 1. Front panel view
