Nady SPA 850 Owners Manual - Page 7

CONNECTIONS The following instructions describe the most common ways to install your amplifier into a sound system. 1. Turn off the amplifier power switch before making any connections. 2. The SPA Series amplifiers maybe operated in one of three modes (stereo, bridged-mono, and parallel mono). Refer to the following wiring diagrams for the speaker connections you wish to make. (Note: Nady Systems assumes no liability for damaged speakers resulting from improper wiring, careless amplifier use, or over powering.) MICROPHONE INPUTS 21 3 Socket (female) Ground (Screen) Cold (-) (Out of Phase Signal) Hot (+) (In Phase Signal) Input Wiring Tips UNBALANCED USE OF MONO 1/4" PLUGS 1 2 3 Tip = Signal Plug (male) Sleeve = Ground/Shield BALANCED USE OF STEREO 1/4" PLUGS Tip = hot (+) Ring = cold (-) Sleeve = Ground/Shield Tip Sleeve Strain relief clamp Tip Ring Sleeve Strain relief clamp • Stereo (Two-Channel) Mode To put the amplifier into stereo mode, first turn the amplifier off, then slide the mode selector switch (13) to the center "STEREO" position, and properly connect the input/output wiring as shown. (Note: Do not connect a speaker load less than 2 ohms as it can damage your amplifier.) CHANNEL B CHANNEL A CHANNEL B PIN 1+ + PIN 1- - CHANNEL A PIN 1+ + PIN 1- - (Note: You can also connect both channel outputs to the Channel A Speakon™. Ch A Pin2+ = ChB Pin1+ and Ch A Pin2- = Ch B Pin1-) 8