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2 amplifier is going to be housed in an enclosed envi-
ronment, that you allow for adequate ventilation.
Despite the adequately sized heatsinks built into the
amplifier, it is still important that good ventilation
be provided. Do not install the amplifier directly
above another heat generating component such as
another amplifier without adequate ventilation.
2. If your amplifier is going to be placed in an en-
closed space such as an armoire, it is essential that
adequate ventilation be provided.
3. The dealership from which you purchased the
product is an expert on custom installation proce-
dures and can provide invaluable advice to help you
make an aesthetically pleasing and trouble free in-
stallation.
Caution For Connections
1. Connect this equipment only to the type of AC
power source as marked on the unit. Always route
AC power cords so they are not likely to be walked
on, or tripped over, or where they may be pinched
by items placed on or against them. Always pay
particular attention to cords at plugs and/or conve-
nience receptacles, and at the point where they exit
from the product.
2. Do not defeat the inherent design features of the
polarized plug. Non-polarized line cord adapters
will defeat the safety provided by the polarized AC
plug. If the plug should fail to fit, contact your
electrician to replace your obsolete outlet. Do not
defeat the safety purpose of the grounding-type
plug. If you use this product in a country which
only has two slotted receptacles in the house, you
must use a three-pin adapter plug to earth ground
which is the E (earth pin) of the power cord con-
nected to this product.
3. Do not overload wall outlets, extension or inte-
gral convenience receptacles, as this could result in
a risk of fire or shock.
Operating Voltage
The LDS2/150 amplifier is factory-set for 110V,
120V or 230V AC operation at either 50 or 60 Hz,
according to the country for which the unit was
manufactured (230V in European Union countries,
in compliance with CE regulations). The operat-
ing voltage cannot be changed by the user and any
attempt to do so will void the warranty.
Care of the Product
Clean the product by dusting with a dry cloth. Donot permit objects of any kind to be pushed and/or
fall into the product through the enclosure open-
ings.
General Description
The 2/150 is an intuitive product that has been de-
signed primarily to facilitate seamless switching
between a television and an installed music system.
Since it is assumed that an audio system is already
in place, the 2/150 has designated that this will be
the primary system and so it is referred to as A
and the interrupter part of the 2/150 is referred to
as B.
The 2/150 outputs a total of 2 x 50 watts into an 8
ohm load and 2 x 75 watts into a 4 ohm load. The
amplifier will drive two pairs of 8 ohm speakers or
one pair of 4 ohm speakers. An embedded MPU
(Micro Processing Unit) ensures that the amplifier
cannot be overdriven, and the LDS (Load Detec-
tion System) ensures that all speaker connections
must be good before the amplifier is connected to
the speakers.
The 2/150 has an automatic internal sub-sonic fil-
ter of -18dB per octave which rolls off very low
frequency content (below 20 Hz) to avoid low fre-
quency saturation of a transformer volume control.
The unit can be set for a bridged/mono application
in which case the output will be 130 watts.
The 2/150 has a great many features all of which
are described in this manual.
Front Panel Description
The front panel has a number of important controls
with which you should familiarize yourself.
The blue LED will glow brightly when the unit is
active and will dim considerably whenever the unit
is in its sleep mode.
B Off Delay
Controls the priority zone and enables you to set
the delay time for the B zone from 0.3 minutes to
a maximum of 5 minutes. You need to set the front
input selector to either B or Auto in order to
use the B Off Delay.
B On Level
Control allows you to set the sensitivity of the auto-
turn on circuit to be triggered by the B input. The
range of this adjustment is from -86 dB below rated
output (indicated as LO on the front panel) to -
72 dB below rated output (indicated as HI on the
front panel).
