Crown Audio 280MA ユーザーズマニュアル

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.

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

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

S

S

SHIELD

SHIELD

(This connection reduces
 the signal level by 6 dB.)