The HOLFI Pre MC1
is driven by four 1.5V batteries, size R20 (Dia 33.5mm x 61mm). 1.25V
nickel- cadmium cells can be used together with a 12V DC/200mA
Loosen the four screws
placed on the underneath of the cover. Then dismount the
cover and place the batteries in their clips. Be sure to
polarize the batteries correctly as shown on the clips.
The batteries must
always be in the same condition; that is, the same brand, and
the same charging. Otherwise the amplifier won't function at optimum. This
is very important when rechargeable cells are used.
The Pre MC1 needs
a warm-up period of several hours before optimum sound quality
is achieved. This means that the Pre MC1 should be kept ON
permanently. By the use of rechargeable cells and suitable
AC-adapter the Pre MC1 will always be kept ON, independent of
the position of the power switch.
offer one month continuous use. Do not use low quality batteries,
as they will result in a poor sound quality from the Pre MC1.
To minimize the consumption
of batteries and thereby protect the environment, HOLFI recommends
that the Pre MC1 be driven by rechargeable batteries. (Nickel-cadmium
The Pre MC1 has a
built-in charger, which enables the cells to remain in the Pre
MC1 during charging.
The charger in the
Pre MC1 may ONLY be used for Ni-Cd cells.
The Ni-Cd cells have
a capacity in the range of 1Ah to 5Ah. We strongly recommend
the Ni-Cd cells with the highest capacity as they offer the best
sound quality for the Pre MC1.
An ordinary 12 Volt
DC/ 200mA AC-adapter is connected to the minijack input. The
batteries will be charged when the power switch is in the OFF
position. At the same time the Pre MC1 is powered by the
charger. Thereby the Pre MC1 is kept warm and always ready
for use with the highest sound quality available.
The power switch
should only be in the ON position when the Pre MC1 is used.
The batteries will always be charged.