I
NSTALLATION
Because of the number and type of vacuum tubes used, the Evolution
20 dissipates a significant amount of heat (approximately 50 watts). It is
essential, therefore, that proper attention be paid to ventilation. The unit
should be mounted horizontally on a flat hard surface so that the
ventilation holes in the bottom are unobstructed. At least three inches of
clearance should be provided above the unit and the cabinet or shelf
should be open at the back. Vertical installation is not recommended.
To minimize hum pickup, keep the unit well away from the power
amplifier, and route power cords away from input cables.
The Evolution 20 requires an ac power line providing between 108 and
125 volts at 50 to 60 Hz. Alternatively, the Evolution 20 is optionally
available for operation on 100, 220, or 240 volt power lines.
CONNECTION
Phono input:
This input provides the amplification and equalization
required by moving magnet and most moving coil cartridges. The phono
input impedance can be selected by a back panel switch. The options
are 70,100,150,250,470,1k,2k,5k,10k and 47k ohms. Most moving
magnet cartridges will sound best at the industry standard 47k setting,
though some may benefit from loading at 10k. Moving coil cartridges are
more variable, and we recommend auditioning the system to choose the
load most suitable for your cartridge.
Tuner, cd, tape 1, tape 2:
These are high level inputs and are electri-
cally equivalent. They present approximately a 20k ohm load to the
source. The outputs of your tape recorders should be connected to tape
1 and tape 2.
Record output:
The record outputs connect the selected signal to your
recorders or external processing loop (eg. equalizer). The output signal
is not affected by the level control. Connect "record out" to the inputs of
your tape recorders or external processors.
Output 1, Output 2:
Connect these outputs to the input of your ampli-
fier(or crossover in a bi-amped system). We recommend the use of an
EVOLUTION 20 OWNER’S MANUAL
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