QSC Audio 6.0 II - Manual (Page 18)

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CONNECTIONS- Outputs: Speakon™ pinout
Speakon Outputs
The Speakon outputs are for use in Stereo and Parallel operating modes. Minimum speaker
impedance when using Speakon connection is 4-ohms. 2-ohm load-connection to Speakon is not
recommended; output power of this amplifier exceeds Speakon capability at 2-ohms.
The Speakons are wired Pin 1+ = positive, Pin 1- = negative. Below is a diagram for reference.
Speakons are wired for Stereo and Parallel operating modes. Do not use
the Speakons if operating in Bridge mode; use the Binding Posts. Each
Speakon is wired only to its own respective channel (no biamp output on
CH1 like lower power amplifiers).
Do not use 2-ohm loads connected with Speakons!
Use Binding Post connections for 2-ohm loads!