3. INSTALLATION
3.1. Placement and mounting
The PRO20 thing to take into consideration when placing your SMAC is your comfort
and an easy access to all the connections.
The SMAC PRO20 is basically conceived as a tabletop mixer and its usual placement
will be between two vinyl or CD players.
The optional metallic LSMAC side profiles kit allows you to firmly fix your
SMAC PRO20 to the surface over which it is placed or over its own profiles (Fig.1).
These profiles also allow to tilt the mixer's position for an easier operation.
Anyway, remember that the SMAC PRO20 has connections in the front of the box, so
if you place it into a hole you will not be able to access these connections.
Because of the high gain of the PHONO and MICROPHONE inputs, always try to place
the mixer as far away as possible from noise sources (dimmers, engines, etc...) and mains
wires. For the very same reason, and under any circumstance, should you ever remove the
unit's metallic cover.
The power consumption of the SMAC PRO20 is very low, so they don't need any
cooling, but you should avoid extreme temperatures and the atmosphere should be as dry and
dust-free as possible.
The SMAC PRO20 operates under 110, 120, 220, 230 or 240V 50/60Hz, depending
on country, (see characteristics in the back of the unit). Make sure that the mains wire (which
plugs into 28) is far away from the signal cables in order to avoid any possible audio hum.
In order to protect the unit from an eventual electrical overload it carries a 250mA
fuse (28). Should it ever blow up, unplug the unit from mains and replace it with an identical
one. If the new fuse blows again contact immediately with our Authorised Technical Service.
YOU MUST NEVER USE A HIGHER VALUE FUSE.
CAUTION: Fuse substitutions have to be performed by a qualified technician.
3.2. Input signal sources
-Turntables: They must be fitted with magnetic cartridges of 1'77 to 56mV nominal
output level. The PHONO inputs (27) of the SMAC PRO20 have a very good headroom so they
can accept high output level cartridges. If you use moving coil cartridges they must be of high
output level type and a transformer or external preamplifier, placed as near as possible to the
turntable, must be connected between the cartridge and the mixer.
5