GamuT M250i - Manual (Page 4)

Unpacking
Open the inner box, remove the 2 top blue foam parts
Lift the amplifier up and place it on its feet. Be careful not to damage the gold plated connectors
on the rear panel. Keep the box and the blue foam, it is specially made to protect the amplifier well,
and you may need it some day, when you move or if you want to upgrade the amplifier.
Connecting the input cables
The main input is the 3-pin XLR socket. This is electronically balanced, and it will
therefore reduce hum pickup in the input cable. So the best choice of cable is a balanced
XLR cable, coming from a balanced output on your preamplifier.
In case you have a preamplifier with only RCA outputs, you can use the RCA input. Remember to
plug in the XLR Terminator plug, when you use the RCA input. It connects the negative
input to ground, making sure that the input is not “floating” with the risk of noise or oscilliation
comming in to the amplifier circuits.
You release the XLR connector by pressing on the release button next to the XLR socket, and
pulling the XLR plug out at the same time. Do not pull on the cable, only on the plug.
The XLR connector: always connect Pin 1 (the ground) first and disconnect it last. This way,
XLR connectors can be plugged and unplugged while the amplifier is switched on.
However, some DC from the preamplifier may still cause loud clicks, so it is recommended to
wait 10 seconds and then switch the power amplifier on as the last precaution. If you use a tube
preamplifier, please wait several minutes the first time you use it. Always switch off the power
amplifier first before switching off your preamplifier or any source. Always remember to turn down
the volume before switching on of off the poweramplifier, if you fail to do so, the output relay
will ware down faster.
DO NOT CONNECT LOUDSPEAKER WIRES OR OTHER HIGH VOLTAGE CABLE TO THE INPUT.
Warming up
The GamuT power amplifier will play sound a few seconds after you turn it on. However, please
allow minimum 30 minutes before you start serious listening, as the sound quality will slowly
improve, because all the parts need to reach their optimum operating temperature.
You may also note a slight improvement in the first months of use. This is caused by the
capacitors, which do improve with use.
A CD player in repeat mode can speed up the process while you are not at home.
Do not play too loud.
After this break-in period is over, simply switch the GamuT on when you get home, and it will be
ready to perform at its best after dinner.