Boston Acoustics In-Ceiling Speakers - Manual (Page 3)

10/8/2008 High Humidity Speakers Technical Brief Page 3 of 4
High Humidity Speakers Technical Brief Cont:
Solar Radiation -- To determine the effects of being out in the sun, such as
yellowing or chalking. 48 hours of very intense UV (1120W/sq m). These
48 hours are supposed to simulate about 1 year of being out in the sun.
High Humidity Speakers Technical Brief Cont:
Low Temperature -- According to the Mil Spec document, this simulates
acceptability in a mild climate such as "coastal Europe and southeast
Australia". This cycles from -6 degrees C to -19 degrees C (21F to -2F) for
48 hours.
High Temperature – According to the Mil Spec document, this simulates
acceptability in a Hot climate such as "North Africa, the Middle East,
Pakistan, and India, southwestern US and northern Mexico". This cycles
from 32 C to 49C (90F to 120F) for 48 hours.
IEC 529 IP Ratings:
Boston Acoustics High Humidity models are tested against the IEC529 IP
rating. This is a standard rating in which to pass the speaker must function
properly at the conclusion of the test. These speakers must meet all of the
frequency response and power handling specifications as listed. Boston
tests these speakers to an IP X5 rating.
Degrees of Protection Against Water
(tests implemented using fresh water)
IP X0 - Not Protected
IP X1 - Protected against vertically falling water drops; drops have no
harmful effects.
IP X2 - Protected against vertically falling water drops when enclosure is
tilted up at a 15° angle; drops have no harmful effects.
IP X3 - Protected against water sprayed at up to a 60° angle; water has no
harmful effects.
IP X4 - Protected against splashing water from any direction; water has no
harmful effects.
IP X5 - Protected against water jets from any direction; water has no
harmful effects.