Crown Audio 140MPA - Manual (Page 9)

Commercial Audio Series Mixer-Amplifiers
page 9 Operation Manual
2.3 Choose Input Wire and Connectors
Crown recommends using pre-built or professionally wired bal-
anced line (two-conductor plus shield), 22-24 gauge cables and
connectors. Unbalanced line may also be used but may result in
noise over long cable runs.
The 140MPA has two types of input connectors: Phoenix-type
and RCA.
• Mic/Line Connectors and Amp Input Connectors: 3-pin
Phoenix-type, balanced, one per input channel (Figure 2.3).
• Dual RCA Input Connector: For stereo music signals,
unbalanced, summed together, two connectors per input (Figure
2.4).
• Transformer-isolated 600-ohm input: 3-pin Phoenix-
type. Summed into Input 1 for paging from a telephone system.
See Figure 2.5.
2 Setup
Figure 2.3 Mic/Line Connectors
and Amp Input Connectors
MIC
+
–
+
–
To mic or line-level source
To stereo
line-level
source
Figure 2.4 Dual RCA Input Connectors
Figure 2.5 Tel (Isolated)
Connector Wiring
from Telephone System
Interface or PBX
-
To telephone system
interface/PBX output