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Commercial Audio Series Mixer-Amplifiers
page 9
Operation Manual
MIXER-AMP INPUT
MIXER-AMP INPUT
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. You should use 3-pin Phoenix-type cable ends at the
amplifier inputs. Unbalanced line may also be used but may
result in noise over long cable runs.
Figure 2.3 shows connector pin assignments for balanced wir-
ing, and Figure 2.4 shows connector pin assignments for unbal-
anced wiring. The RCA input connectors can also be used for
unbalanced inputs.
Figure 2.3 Balanced Input
Connector Wiring
Figure 2.4 Unbalanced Input
Connector Wiring
2 Setup
2.4 Choose Output Wire and Connectors
For the amplifier output connectors, Crown recommends using
pre-built or professionally wired, high-quality, two-conductor,
heavy gauge speaker wire and connectors. You may use crimp-
on spade lugs for your output connectors (Figure 2.5). To prevent
the possibility of short-circuits, wrap or otherwise insulate
exposed loudspeaker cable connectors. Cover the output con-
nections with the supplied non-touch cover.
Using the guidelines below, select the appropriate size of wire
based on the distance from amplifier to speaker. The wire sizes
apply to the 4-ohm tap.
Distance Wire Size
up to 25 ft. 16 AWG
26-40 ft. 14 AWG
41-60 ft. 12 AWG
61-100 ft. 10 AWG
101-150 ft. 8 AWG
151-250 ft. 6 AWG
NOTE: Custom wiring should only be performed by
qualified personnel. Class 2 wiring is required.
CAUTION: Never use shielded cable for output power
wiring.
Use 2-conductor shielded cable and 3-pin Phoenix-type
connectors for Line Output wiring (Figure 2.6)
Figure 2.5 Two Amplifier Output Connectors on
280MA Back Panel
(One Connector in 180MA and 1160MA)
Figure 2.6 Line Out Wiring.
Top: Balanced. Bottom: Unbalanced.
S
S
BALANCED LINE
TO DESTINATION
UNGROUNDED
PRODUCT WITH
2-PRONG POWER
CORD ONLY
TO DESTINATION
UNBALANCED LINE
OUTPUT
OUTPUT
SHIELD
SHIELD
(This connection reduces
the signal level by 6 dB.)