QSC Audio CX168 user manual Applications Typical Application Examples, Four Room Stereo Feed

APPLICATIONS: TYPICAL APPLICATION EXAMPLES

Four Room Stereo Feed

A simple application of the CX168 would be an installation with 4 rooms of coverage; each room to be provided with a stereo audio feed. All speakers are 4 ohm or greater impedance and have a frequency response rated down to 45 Hz., making them suitable for the 70 Hz. low frequency setting. Clip limiting will be used with these full-range speakers. Operating mode of all four channel pairs will be set to ‘stereo’ because the audio inputs are stereo and a stereo result is desired in each room.

Input connections can vary too much to provide meaningful examples. For this example, assume that each input has its own discrete signal provided at the terminal block input connectors.

Routing would make sense if kept in room number order:

Room #1:	Fed by channel pair #1 (Ch.1&2)
Room #2:	Fed by channel pair #2 (Ch.3&4)
Room #3:	Fed by channel pair #3 (Ch.5&6)
Room #4:	Fed by channel pair #4 (Ch.7&8)

MODE switch configuration:
Ch.1/ Ch.2 mode switch:	Clip Limiters ON
	Low Frequency Filter ON
	Low Frequency Setting 70 Hz.
	Mode: stereo

Ch.3/Ch.4 mode switch: Ch.5/Ch.6 mode switch: Ch.7/Ch.8 mode switch:

same as first mode switch same as first mode switch same as first mode switch

Tri-Amp’d Stereo Cabinets with Subwoofer Driven by Bridged Channel Pair (next page)

Two discrete 3-way (tri-amp) cabinets are to be connected to the CX168 along with an 8 ohm subwoofer cabinet.

The subwoofer will require the most amount of power and therefore will be driven by two channels bridged into one. Its impedance meets the minimum requirement for bridged output. All other drivers are 4 ohms or greater and meet the single channel minimum impedance requirement. Each of the tri-amp cabinets will be driven with three discrete channels (totaling 6 channels). The total required channel count is 8; the CX168 is the perfect tool for the job.

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