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Music
Setting a trigger mode switch to MUSIC position,
sets the LDS16-40 zone-amps into auto-on-
standby power control mode. Each zone-amp can
sense, individually, a very low level music signal
fed to its signal input, which will turn the amplifier
into an active state and will play the music. When
the music stops and no further signal is received
for more than 10 minutes, the zone-amp will turn
into a standby mode, which cuts off the power
consumption substantially and the green LED will
become dim. The zone-amp will wake up from
the standby mode, or sleep mode, whenever the
zone receives a music signal again.
12V
Setting the trigger mode switch of a zone-amp to
12V allows the power-on-standby function of that
zone-amp to be controlled by a 12V DC voltage
connected to the 12V input jacks of group A and
group B amplifiers. When 12V DC is present at
the 12V trigger input jacks, the zone-amplifiers will
turn on, and when the 12V disappears, the zone-
amps will enter the standby mode momentary.
Under standby mode, no music signal will go
through that zone-amps and there is no output sent
to the speakers. The zone-amplifiers will wake up
from the standby mode whenever the zone receives
a 12V trigger input.
Note that the 12V trigger input jack of group A is
not internally connected to the 12V input jack of
group B. A cable must be connected from the
trigger output jack of A group to the trigger input
jack of B group, if amps in both groups are to be
triggered simultaneously by only one 12V trigger
source.
Speaker Terminals and Speaker
Loads
Each LDS16-40 provides one set of speaker
terminals per zone for left and right speaker
connections. When operating a zone amplifier
under a stereo or mono mode, use only a speaker
of 4 ohms or greater impedance for your
installation. But when operating in BRGD (bridge
mode), use only a speaker of 8 ohms or greater
impedance.
Stereo/Mono/Bridged Switch
Stereo
Setting the switch to STEREO operates a zone
amplifier, in a regular 2-channel, stereo mode.
Mono
Setting the switch to MONO sums the left and right
inputs together and plays the same signal to both
the left and right speakers.
Bridging
Setting the switch to BRGD operates a zone
amplifier in the bridged mode, which turns the
output of the left channel into the same signal as
the right channel, but in the opposite polarity. Under
this bridged mode, a speaker of 8 ohms minimum
impedance can be connected between the positive
(marked “+”) polarity of the right speaker terminal
and the positive polarity (marked “+”) of the left
speaker terminal in order to receive a two-times
output voltage (for higher power output). The
positive polarity of the speaker should be
connected to the “+” terminal of the right channel
for the speaker to be in the correct phase.