User manual ROLLS PM52

[. . . ] The 1/4" Mono/stereo loop jacks are for cascading more boxes in series. [. . . ] HEADPHONES: Two 1/4" stereo TRS jacks for connection to stereo headphones. MONO STEREO In order to use this system safely, avoid prolonged listening at excessive sound pressure levels. Please use the following guidelines established by the Occupational Safety Health Administration (OSHA) on maximum time exposure to sound pressure levels before hearing damage occurs. USING THIS SYSTEM AT EXCESSIVE VOLUMES CAN CAUSE PERMANENT HEARING DAMAGE. USE AS LOW A VOLUME AS POSSIBLE WARNING 90 dB SPL at 8 hours 95 dB SPL at 4 hours 100 dB SPL at 2 hours 105 dB SPL at 1 hour 110 dB SPL at 1/2 hour 115 dB SPL at 15 minutes 120 dB SPL - avoid or damage may occur It is difficult to measure the exact Sound Pressure Levels (SPL) present at the eardrum in live applications. In addition to the volume setting on this Personal Monitor unit, the SPL in the ear is affected by ambient sound from floor wedges or other devices. The isolation provided by the fit of quality earphones is also an important factor in determining the SPL in the ear. Follow these guidelines in the use of this product to protect your ears from damage: 1. [. . . ] Drummers, instrumentalists, and sound professionals alike have all benefited from the PM52. - Converts speaker level signals to headphone level - Elliminates heavy wedge monitors - Passive - no power required Rolls Corporation Salt Lake City, UT 9/95 Headphone Tap PM52 [. . . ]