2 setup – Crown Audio Commercial Audio Series (180A-280A-660A-1160A) User Manual

Page 10

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Commercial Audio Series Amplifiers

page 10

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

CAUTION: Never use shielded cable for output power
wiring.

NOTE: Custom wiring should only be performed by
qualified personnel. Class 2 wiring is required.

Use 2-conductor shielded cable and 3-pin Phoenix-type connec-
tors for Line Output wiring (Figure 2.6)

Figure 2.5 Two Amplifier Output Connectors on
280A Back Panel
(One Connector in 180A and 1160A)

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.)

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