Leema-acoustics Monoblock Power Amp Handbook - page 7
Preamp Output
Outputs are provided which mirror the selected input e.g. SLAVE/AV or Multi 1. These outputs are controlled
by the amplifier's volume control and can be used for a variety of uses. Examples include feeding an
amplifier in another room for a simple multi-room system, or as a line level feed to a subwoofer. They can
also be used for bi-amping, where one amplifier is used to drive the tweeters in the loudspeakers and a
second is used to drive the woofers.
Bi-amping offers an increase in clarity by reducing intermodulation distortion. The loudspeaker no longer
draws bass current from the amplifier feeding the tweeter, resulting in cleaner high-frequencies etc. The
loudspeakers must be suitable for bi-amping, this is normally the case where there are two pairs of binding
post connections available on the rear of the loudspeaker cabinets. When bi-amping, it is
VITAL to remove
the bridging links from the connection panel on the rear of the speakers, otherwise the outputs of the two
stereo amplifiers will be connected together, which will result in considerable damage.
If you are considering bi-amping and are unsure, please contact your dealer or Leema Electro Acoustics Ltd.
for advice.
LIPS Connection
LIPS cables are directional and have one black end and one red. If the amplifier is controlling other units, the
black connector should be plugged in to either LIPS socket and the red connector plugged in to the next
component. If the amplifier is to be controlled, the black connector is connected to the master device and the
red connector is plugged in to either LIPS socket on the rear of the power amplifier.
Loudspeaker Terminals
There are two pairs of low profile loudspeaker terminals on the rear panel, one pair for the left loudspeaker
and one pair for the right loudspeaker. They are designed for industry standard 4mm banana type plugs.
They are not suitable for bare wire connection. Due to the amplifier's unique circuit topology, neither of the
Black sockets are earthed.
Cables
Never underestimate the importance of good quality speaker cables, bell wire or lighting flex will simply not
do. The higher the system resolution, the more easily the differences between cables can be discerned.
Leema recommend the use of high quality bi-wire cables with your new amplifier to ensure optimum fidelity.
However, a single high quality run is always superior to two runs of inferior cable. If your budget is tight, get
the best quality single run you can afford. Leema recommend Leema Linx cables for optimum system
synergy.
Power Switch
The Power button toggles the amplifier between Power On and Off. If a LIPS connection is used, the power
status can be controlled and any other Leema components connected via LIPS will also be controlled.
LIPS Volume Control
The volume is adjusted via a precision attenuator under microprocessor control. This method of volume
control permanently ensures the highest fidelity without the gradual degeneration of conventional motorised
volume controls. It also allows the volume of multiple amplifier to be synchronised. The volume control also
regulates the pre-out volume.
Note: Small clicks in the audio during volume changes are normal.
7