Crown Audio Setup, M Series Power Amplifiers, page, Choose Input Wire and Connectors, Distance

M Series Power Amplifiers

2 Setup

2.4 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. Depending upon which amplifier input you choose, you should use either 3-pin male XLR connectors, TRS phone connectors, or terminal forks at the amplifier inputs.

Unbalanced line may also be used but may result in noise over long cable runs.

Note: Amplifier input connectors not used for audio signal input may be used for daisy-chaining of the audio signal to other com- ponents.

Figure 2.3 shows connector pin assignments for balanced wiring, and Figure 2.4 shows connector pin assignments for unbalanced wiring.

NOTE: Custom wiring should only be performed by qualified personnel.

2.5 Choose Output Wire and Connectors

Crown recommends using pre-built or professionally wired, high- quality, two- or four-conductor, heavy gauge speaker wire and connectors. You may use two 4-pole Speakon® connectors (Fig- ure 2.5 and Table 1) or banana plugs, spade lugs, or bare wire for your output connectors (Figure 2.6). To prevent the possibility of short-circuits, wrap or otherwise insulate exposed loudspeaker cable connectors.

Note: Binding post outputs on European models come with safety plugs installed to prevent European power- cord plugs from being inserted. The top & bottom entry positions for these connectors should therefore be used with European models.

Using the guidelines below, select the appropriate size of wire based on the distance from amplifier to speaker.

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 wiring.

Figure 2.3

Balanced Input

Connector Wiring

Figure 2.5

Left: Speakon®Output Connector on Back Panel

Right: Speakon®Cable Connector

Table 1 Speakon® Output Pin Assignments

Figure 2.4

Unbalanced Input

Connector Wiring

Figure 2.6

5-Way Binding Post Connections

Operation Manual page 7