Mains Power; Using The M1 Line; Cleaning; Replacing And Upgrading The Valves - Audio Note M1 Line Owner's Information

Mains Power

An IEC power connector is located on the back of the M1 Line. Use the supplied
power cable to connect the pre-amplifier to the mains supply. Ensure the power is off
at the switch when you do this.

Using the M1 Line

Once all the connections are completed and checked, make sure all power amplifiers
are off and flip the mains rocker switch located on the back panel of the pre-amplifier
to the 'on' position.
The M1 Line is a vacuum tube design and therefore requires about 45 seconds warm-
up time. After this the remaining system components may be turned on.
NOTE: Always turn the pre-amplifier on before turning on the power amplifier and
always turn the power amplifier off before turning off the pre-amplifier. This will
prevent any buzzing or popping sounds from occurring.
In order to use the line inputs, select 'source' and the appropriate input. To listen to a
tape select 'tape', the position of the source selector will not affect the output when
'tape' is selected. The volume control adjusts the overall output level of the pre-
amplifier while the balance control can be used to correct minor imbalances in the
stereo image. The balance control provides 9dB of attenuation for each channel. It
will not reduce the volume of either channel to zero.
The M1 Line will improve over time and will start to sound increasingly well
balanced. This is because of the "bedding in" time taken by new electrical
components inside the unit. Also, the pre-amplifier's sound quality improves as the
unit reaches its normal, stable operating temperature. Only a rear panel on/off switch
is provided as the unit is designed for continuous operation. The M1 Line need not be
switched off each time after use. It is interesting to note that continuous operation not
only results in optimum sonic performance (since the unit is maintaining a constant
operating temperature) but also causes less electrical stress and so extends component
and valve life.

Cleaning

Cleaning the pre-amplifier is best done with a soft brush - some photographic stores
are able to provide suitable brushes. Alternatively, a soft cotton cloth may be used
with a mild propriety cleaner for removing dirt build-up. Strong or alcohol based
solvents may damage the finish of this product. Ensure the pre-amplifier is switched
off and cold when cleaning. Do not wet the unit.

Replacing and Upgrading the Valves

Replacement NOS valves can be purchased from Audio Note when valves fail or
should you wish to experiment with different types of valves. A list of valves and
equivalents can be found at www.audionote.co.uk. Contact your dealer if you are
unsure what valves you should use or how to install them.
Line stage valves should provide you with 5 years of continuous operation, rectifier
valves should last much longer.