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10/8/2008 High Humidity Speakers Technical Brief Page 2 of 4
High Humidity Speakers Technical Brief Cont:
Grille – For all of Boston Acoustics are produced out of rustproof aluminum and
are painted with a powder coat for additional protection against corrosion and
salt. The speaker grilles can be painted.
Hardware – All of the hardware on these models are either made of rust resistant
stainless steel or are power coated to resist rust and corrosion.
Switches – The switch located on the front of the VSi H470T2 is a waterproof
design and is additionally protected with a soft rubber boot.
Crossover Board and Components – The entire crossover board and all of the
components is sprayed under pressure with a conformal coating that is highly
resistant to moisture and adds significant life to the components over non
protected surfaces.
Speaker Frame – The speaker frame is made out of a high impact ABS plastic
that is UV protected to limit extends the life of the material and limit the possibility
of discoloring caused by exposure to the sun. The speaker frames can be
painted.
Testing:
Boston Acoustics High Humidity models go through an exhaustive life test that
submits the speakers to many years exposure to the elements. The
loudspeakers are designed to pass the internationally recognized IEC529 and Mil
Spec 810. These tests simulate the approximate climatic conditions and provide
an indication of the degrees of weather resistance. Boston Acoustics further
submits these models to long term in use testing through out the country.
Mil Spec 810:
Salt Spray -- This tests a speaker’s resistance to the effects of an
"aqueous salt atmosphere". It also gives a good indication of resistance to
rusting. It consists of 48 hours continuous spray consisting of 5% salt
solution.
Humidity -- This is to indicate a speakers resistance to a warm humid
atmosphere such as you may find in a sauna or outdoors. 48 hours of
cycling. Starts at 100% humidity @ 27 degrees C; goes to 95% @ 35
degrees and goes back to 100% at 27 degrees C.