Cloud Electronics MPA626 - Manual (Page 5)

4 MPA-626: Installation and Operation Manual
4 Music Inputs
The unit has six stereo line inputs that are 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. The input impedance is 47k
Ω. The Line
6 input can be configured to have priority over any other music source, see section 6.
4.1 Sensitivity & Gain Control
All six stereo line inputs have a pre-set gain control on the rear panel adjacent to the respective
input socket. The gain control has a range of 20dB allowing the input sensitivity to be varied
from -12dBu (200mV) to +8dBu (2.0V). The pre-set gain control should be set so that all the
input signals are operating at the same level and that the front panel level control has an
optimum range of control.
4.2 Music Source Select
This front panel six position switch is used to select the desired music signal. Use the supplied
label pack to identify the signal sources on the front panel. Line 6 input can be configured to
have priority over any other selected signal, see section 6 for full details.
4.3 Music Level Control, Local or Remote
A front panel mounted music level control is provided. Remote control of the music level is
possible by connecting a remote level control plate (RL-1) to the 3 pole connector on the rear
panel of the MPA-626 see the diagram below.
Setting internal jumper J12 to the disable position will disable the front panel level control, see
the diagram below for jumper location. A front panel LED adjacent to the level control will
illuminate to indicate that the control is bypassed. Use two core screened cable to connect the
remote level plate (max length 100 metres).
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