Jas-Audio GREEN POWER 120 - Manual (Page 2)

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The default of GP-120 is an integrated amplifier from the factory, i.e. to make pre-amp and power amp connected by using a pair of jumpers
properly put in place (marked pre-out and main-in inside a box on the rear) . Simply connect signal cables to the amplifier, and speakers
with a pair of speaker cables, a basic set up is then completed (see Diagram 1). Users are reminded to switch off the amplifier whenever
connection with external devices or in basic set up so as to avoid any pops, clicks or other unwanted noises.
INPUT CONNECTION AND SWITCHING
As all the line input levels are the same, it is not necessary to use the precise input as described. You may, for example, plug a CD player into
the Tape input and obtain exactly the same result and performance as the dedicated CD input. This also applies to signal input from PC
and MP3 via a piece of 3.5-RCA cable (see Diagram 1a).
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Diagram 1a
PRE/ POWER CONNECTIONS
The pre-amp output and the power amp inputs are available through RCA sockets on the rear panel. This is
helpful if you wish to bi-amp the Green Power GP-120 or just to make use of the signal amplification circuit to
work with an external power amp. The default setting from the factory is both sets of RCA (pre out and main-in)
are connected by having a pair of jumpers put properly in place. However, when using an external device, such
as a sub-woofer or graphic equalizer etc. it may be necessary to separate the pre and power amps. To do this,
simply remove the jumpers and connected the RCA sockets indicated as pre-out with a pair of signal cables
to an external device. On the contrary, when the GP-120 is intended to be used as a power amp, connect
signal source from an external device to the RCAs indicated as “main in”.
Users are reminded to switch off the amplifier whenever connection with external devices or in a basic set up
so as to avoid any pops, clicks or other unwanted noises.
N.B. Switch the amplifier off before making any changes in order to avoid any pops, clicks or other unwanted noises.
LOUDSPEAKER CONNECTIONS
The loudspeakers should be connected to the terminals using a suitable pair of cables designed specifically for audio use. High grade, touch
proof, terminals on the rear panel allow for 4mm plugs or bare wire to be connected. Tighten the terminal fully after fitting the speaker wire.
Please consult your dealer for advice if you are unsure.
It is very important to connect the loudspeakers to the loudspeaker terminals in the correct phase. Cables are normally polarized with a line or
a raised bump on the positive side. If one channel is not connected in the same fashion as the other, a severe loss of bass performance
and a spreading of the stereo image will result.
Important - Do NOT short the loudspeaker cables together when the other ends are still connected to the amplifier, as permanent damage
can result. If it is necessary to move or change the location of the loudspeakers, make sure that you first 'switch off' the amplifier from the
mains.
VOLUME
Volume push buttons are marked as upward and downward arrows and are situated on the
right hand side of the selector button is used to alter the relative level of the sound output
from the amplifier. Alternatively, volume can be controlled by the remote.
Selector & Volume
push buttons