7
Installation (continued)
Pick Points (suspended installations)
The HPR152i and HPR153i enclosures feature three load-rated pick points. 
The HPR122i enclosure features nine load-rated pick points. As shipped 
from the factory, each pick point has a bolt or plug installed to retain the 
air-tight design of the enclosure. Never operate the loudspeaker with the 
pick points open (unsealed) as it will degrade the performance of the 
product.
Ensure all pick-point fasteners are installed and correctly 
tightened in order to maintain enclosure’s rated strength. 
Additionally, air leaks resulting from missing hardware will 
degrade the loudspeaker’s performance.
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 orientation can cause overheating and 
thermal limiting. The cooling fins on the amplifier module must be 
vertically oriented in order to efficiently dissipate the heat gener-
ated by the amplifier.
Do not install enclosures with their rear panels exposed to direct 
sunlight. Direct sunlight will heat the amplifier module and reduce 
its ability to produce full output. Install sunshades if the applica-
tion merits.
Maximum ambient temperature for full performance to specifica-
tion is 40° C. (104° F.).
Do not install enclosures where exposed to rain or other water 
sources. The enclosure is not weatherproof. Outdoor installations 
must provide protection from the elements.
Pickpoints on the 
HPR122i
Pickpoints on the 
HPR152i and 
HPR153i