Cloud Electronics MA60Media - Manual (Page 16)

MA60 & MA60
media
Installation and User Guide v1.2 16
Ventilation
MA60 and MA60
media
mixer-amplifiers are cooled by natural convection, via vents in
the top and bottom panels. Always allow adequate space around the unit(s) to allow a
free flow of air. In 19” rack installations we recommend leaving 1U of rack space above
and below each unit. In free-standing installations, always fit the rubber feet supplied,
and do not stand any other items on top of the unit.
Connections and adjustments
Music inputs
The unit has four stereo line inputs, each of which is mixed internally to mono; these
inputs are suitable for most music sources such as compact disc players, tape players,
satellite receivers and the like.
All inputs are unbalanced and use RCA phono sockets
1
. Line 2 has a second
(parallel) input connector in the form of a 3.5 mm 3-pole jack socket
2
to allow
convenient connection of a computer soundcard or MP3 player output. This is
a stereo, unbalanced input on a single connector. Plugging into this socket will
disconnect any source connected at Line 2’s phono connectors.
Line 4 input can be configured to have priority over any other music source, see
“Music Priority” on page 17.
Sensitivity & Gain Control
Each of the stereo line inputs has an input impedance of 47k ohms and a pre-set gain
control on the rear panel below the respective input sockets
3
. The gain control
has a range of 20 dB allowing the input sensitivity to be varied from -12 dBu to
+8 dBu (0 dBu = 0.775 V
rms
). The pre-set gain control should be adjusted so that all
the input sources in use are at roughly the same volume and that the front panel level
control has a useful range of control.
Music Source Select
This front panel four-position switch
7
is used to select the desired music signal. On
the MA60
media
only, note that the first switch position will select either Line Input 1
or the internal digital media player, depending on the setting of the rear panel MEDIA/
L1 switch
20
. Remote control of source selection is possible with a remote control
plate type RSL-4/RSL-4A, see “Remote Control of Music Source Select and Level” on
page 17.