Crown Audio 180MA Choose Input Wire and Connectors, Choose Output Wire and Connectors, Setup

Commercial Audio Series Mixer-Amplifiers

2 Setup

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-	MIXER-AMP INPUT
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

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-

Figure 2.4 Unbalanced Input

Connector Wiring

MIXER-AMP INPUT

BALANCED LINE

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)

S SHIELD TO DESTINATION

OUTPUT

	UNBALANCED LINE	TO DESTINATION
	SHIELD	UNGROUNDED
S		PRODUCT WITH
		2-PRONG POWER
OUTPUT	(This connection reduces	CORD ONLY
	the signal level by 6 dB.)

Figure 2.6 Line Out Wiring.

Top: Balanced. Bottom: Unbalanced.

Operation Manual page 9