QSC Audio AcousticPerformance Series Loudspeaker (Black) - Manual (Page 5)

AcousticPerformance™ Series Loudspeaker Application Guide 5
Series features
TiltDirect™
A loudspeaker on a stand is a common application for portable and temporary sound systems.
All too often, though, the loudspeaker axis points over the heads of the audience.
To solve this problem, the AP-4122m and AP-5122m both have TiltDirect pole sockets that
allow the loudspeaker cabinet to sit upright on a stand or tilt downward at a 7.5-degree angle
to better cover an audience.
TiltDirect™ pole socket: 0° top;
7.5° bottom. Both the AP-4122m
and AP-5122m have TiltDirect pole
sockets.
Dual NL4 connectors
The AP-212sw subwoofer system uses two Speakon NL4 connectors on the back panel.
One is labeled INPUT and the other, Through. The pair are cross-wired; the input is wired
to use 1+ and 1- to feed the subwoofer drivers, and 2+ and 2- to pass signal along to the
Through connector, but the wiring is switched around so that the signal appears on 1+ and 1-.
Therefore, you can use a four-wire loudspeaker cable from the amplifier to the first subwoofer
carrying, say, subwoofer program material on one pair (1+ and 1-) and a full-range loudspeak-
er’s program material into 2+ and 2-. Then, the full-range material comes out of the Through
connector on 1+ and 1-, which makes it easy to send on to the loudspeakers via common
two-wire cables using 1+ and 1-.