Remote Input Connector
ERemote input connector (see figure 2) — This
Options for remote control include the Extron VC 50, VCM 100 AAP, VCM 100 MAAP, or MLA VC10. Third party 10k potentiometer volume controllers can also be connected to this port. See the notes on page 4 for important information about connecting wires to captive screw connectors.
Wire the remote control connector to the VCM 100 MAAP as shown in the figure at right and instructions below:
zz Pin 1 is 10 VDC reference voltage.
zz Pin 2 (VOL/MUTE) has two functions:
| 10 V | |
Volume Pot | 2K | |
Vol/Mute | ||
10K Ohms | ||
Mute | ||
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| Switch | |
| GND |
zz
zz
It can be used as a variable voltage input. The volume control DC voltage range is 0 to 10 V, with 0 V giving full attenuation and 10 V giving maximum volume.
It can be used for remote control muting. Sound is muted while the mute pin is shorted to ground.
zz Pin 3 is ground.
NOTE: | All nominal levels are at ± 10% |
More information about remote control of these amplifiers can be found on page 9.
Speaker Connections
F Speaker connection (see figure 2) — Connect the speakers | OUTPUT | |||||
to this socket using the |
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connector (shown at right). |
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The three left channel inputs (RCA, TRS and captive screw)
are summed to form Left Sum, with weightings proportional to their respective sensitivities. Similarly the three right channel inputs are summed to form a Right Sum. Left Sum and Right Sum are mixed and amplified to provide one high voltage, mono output. The MPA 401‑70V provides up to 40 W for a 70 V line distributed sound system; the MPA 401‑100V provides up to 40 W for a 100 V line distributed sound system.
See the notes on page 4 for important information about connecting wires to captive screw connectors.
CAUTION: Do not short the + and - outputs to each other or to ground (
) as this will damage the amplifier.
MPA | 6 |
