Boston Acoustics HSi H460T2 Guide de référence

10/8/2008 High Humidity Speakers Technical Brief Page 1 of 4

High Humidity Weather Resistant In-Ceiling Speakers Technical Brief

V2 10/6/08

General Description:

Boston Acoustics Weather-Resistant Custom In-Ceiling Speakers are designed

for outstanding durability as well as exceptional sonic performance. These

weather-resistant speakers can be used in bathrooms and other moist interior

locations as well as exterior locations that include some protection from the

elements.

No speaker is completely weatherproof. Salt water, driving rains, direct sunlight,

and freeze and thaw cycles will degrade all materials over time. Unprotected

outdoor locations may cause the speaker to deteriorate more quickly. To ensure

protection from the elements, speaker cones are made of polypropylene and

surrounds are made of rubber. The woofers are attached with coated steel

fasteners and coated steel speaker grilles that provide additional protection for

the drivers. The speaker frames are made of ABS plastic and are UV resistance

so they can be used outside near sunlight. For added durability and better

performance in these environments, Boston Acoustics weather-resistant models

are further protected from the elements by; completely sealing the electrical

components including the entire crossover board in a special conformal coating;

using waterproof switches and using a moisture-resistant seal between the

tweeter post and the voice coil.

Weather Resistant Features:

Tweeter – The tweeters HSi H460T2 are made of polypropylene material which

is highly resistant to both temperature and moisture. The soft dome Kortec®

tweeters on the VSi H470T2 are covered in a coating that is highly resistant to

temperatures and shed water very easily and it is highly moisture resistant.

Tweeter Post and Woofer Voice Coil – The tweeters on the Boston Acoustics

High Humidity models are coaxial mounted over the woofer voice coil. Boston

designed a special post collar that completely shields the voice coil from the

intrusion of moisture. The collar is attached to the woofer cone and slides smooth

on the tweeter mounting post.

Woofer Cone – The HSi H460T2 use a coated fiber material which is highly

resistant to both temperature and moisture. The polypropylene woofer on the

VSi H470T2 is highly resistant to temperatures and shed water very easily and it

is highly moisture resistant.

Woofer Surrounds -- The surround is made of water-proof butyl rubber material

that extends to the edge of the speaker frame for added protection.

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.

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.

10/8/2008 High Humidity Speakers Technical Brief Page 4 of 4

High Humidity Speakers Technical Brief Cont:

Boston Acoustics loudspeakers have been exceeding the expectations of serious

music listeners for over 25 years. With advanced engineering, innovative design

and high quality manufacturing, our High Humidity speakers embody everything it

means to be from Boston.

Boston Acoustics maintains an ongoing program of product improvement.

Speakers are under constant testing and quality control auditing to ensure that

they always meet or exceed our published specifications. If you have any

questions please e-mail our Product/Technical Support staff at

[email protected]

These models offer a limited warranty to the original purchaser purchased from

an authorized Boston Acoustics dealer, including authorized internet partners.

This warranty protects against defects in materials or workmanship that occur in

normal use of the Boston Acoustics product for 5 years and will be repaired

without charge for parts and labor. If product cannot be repaired, it will be

replaced with a comparable product or (at Boston Acoustics’ discretion) a refund

of the current retail price of the product. It is the customers’ responsibility to use

the unit according to the instructions supplied, to provide safe and secure

transportation to an authorized Boston Acoustics service representative, and to

present proof of purchase in the form of the original sales receipt to establish

warranty coverage. The customers’ sales receipt should note the model, serial

number and date of purchase from an authorized Boston Acoustics dealer.

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