NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL. The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsulated “dangerous” voltage within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to humans. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instr

Turn ON each monitor’s 100 Hz LOW-CUT FILTER. This will improve vocal clarity and minimize low frequency (bass) buildup on stage. Application Example #5 physical diagram. HPR122i Mixer or Other Audio Source Channel 1 or Left Channel Channel 2 or Right Channel Application Example #5 hookup diagram. Use only high-quality balanced cables for interconnecting the audio equipment. Ensure the floor-monitors have their 100 Hz LOW-CUT FILTER switched ON to provide improved clarity in the middle- and high

Use only QSC’s M10 forged shoulder eye bolts. Contact QSC Technical Services department for complete information. Cooling This is a self-powered loudspeaker containing an internal power amplifier that produces heat. Allow a minimum of 6” (152mm) clearance at cabinet back for convection cooling. Keep anything that might restrict airflow away from the rear of the enclosure (i.e draperies, fabric, etc...). Do not use the HPR152i, HPR153i, HPR151i, or HPR181i oriented horizontally. Horizontal orient

Polarity can be altered by miswired input cables, interconnecting cables, mixer polarity switches set incorrectly, just to name a few likely culprits. To make matters a bit more complicated, phasing is also influenced by the position of loudspeakers with respect to one another and by their position in a given room. It is possible to have all loudspeakers polarized properly (electrically) and yet achieve better bass response by having the subwoofer reverse polarized. It is even possible to achiev