Fender 118SC owner manual Powered Mixer, Crossover Suggestions, PCN-2 ELECTRONIC CROSSOVER

CROSSOVER SUGGESTIONS

After the speaker system has been placed, the crossover point needs to be set for maximum benefit. While the 18" driver in the 118s/118sc is fully capable of accurately reproducing frequencies above 400 Hz, setting the crossover point this high makes time alignment very difficult and the large 18" woofer will start to "beam". Beaming occurs when lower frequencies are emitted in an approximately omnidirectional pattern while higher frequencies are emitted more on-axis. For the 118s/118sc, this occurs above the crossover points of 400 Hz. If the crossover point is set too high and the subwoofer is placed far from the mid/high packs, bass frequencies will sound like they are being produced in two different locations. Most listeners cannot locate the origin of frequencies below 150 Hz. Setting the crossover point too low (below 80 Hz) will not take full advantage of the subwoofer because it places too high of a demand on the mid/high packs. For these reasons, a crossover point of ranging between 80 and 200 Hz is recommended depending upon the placement of the speakers.

The output level of the subwoofer(s) should be matched by ear to the output level of the full range cabinets by adjusting the level control at the crossover (if it has one) or at the power amplifiers. Normally, the output of the full range cabinets is subjectively higher than that of the subwoofers so a balance can be achieved by turning down the mid/high frequency signal at or before the power amplifiers.

FIGURE 1

POWERED MIXER

MAIN	MAIN	MON.	MAIN	MONITOR
OUT	AMP IN	AMP IN	OUT	OUT

INPUT	HIGH	LOW
	OUT	OUT

PCN-2

ELECTRONIC

CROSSOVER

FULL

2912(c) RANGE

INPUT

FENDER

TRIPOD STAND

118s(c)

5