Leema-acoustics Monoblock Power Amp Handbook - page 6
Rear Panel Connections & Switches
Channel Switch
Because the amplifier can be used under LIPS control, where the volume level is controlled inside the power
amplifier, the unit needs to understand how it is being used. The channel switch tells the unit if it being used
in normal stereo mode, or as a monoblock feeding the right or left speaker. Set this switch appropriately to
enable the amplifier to respond to LIPS control messages correctly.
Mode Switch
The mode switch allows the gain of the amplifier to be reduced by 6dB when set to 'mono'. This setting may
be used when the amplifier is configured for monoblock operation (which would normally increase the gain
by 6dB) but the gain increase is undesirable, for example, when mixing stereo and monoblock amplifiers in
the same system with monoblocks driving the woofers and a stereo amplifier driving the tweeters. In this
case setting the mode switch to mono will make the monoblock gain match other stereo amplifiers in the
system.
LIPS
The LIPS switch offers three modes of operation:
LIPS VAR(iable) – In this mode, the input is locked to the SLAVE/AV input, but the volume is controlled by
LIPS data. Use this mode when using the amplifier with a LIPS capable Pre-amp, Pyxis for example. In this
case, Pyxis would be set to fixed output (LIPS mode) and the system volume would be controlled inside the
power amps via a LIPS connection.
FIXED – In this mode, the amplifier behaves like a conventional power amp with fixed volume level. The
input is via SLAVE/AV.
SURROUND – In this mode, the volume level is controlled via LIPS as in LIPS VAR mode, but the input can
be selected via LIPS between SLAVE/AV and Multi 1 for use in surround systems.
RCA/XLR
This is a pushbutton which is located behind the rear panel so that it cannot be pushed accidentally. The
switch sets the SLAVE/AV input to the XLR or RCA connectors. With the power removed, use a small object
such as a cocktail stick, to gently push or release the switch.
NORM/MONO
This is a pushbutton which is located behind the rear panel so that it cannot be pushed accidentally. The
switch selects between Normal stereo operation and Monoblock mode. With the power removed, use a small
object such as a cocktail stick, to gently push or release the switch.
Loudspeaker Outputs
The loudspeakers connect here. Ensure correct polarity:
Red terminal is +
Black terminal is -
WARNING
Black terminals are
NOT grounded.
Do not make connections with unit connected to the mains supply.
4mm banana type plugs must be used.
Note: To use Monoblock mode, the speaker cables must be connected differently to stereo mode. Refer to
the rear panel legend for connection details.
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