Electro-Voice Premium Surface Mount Speakers manual Salt Spray, Humidity, Solar Radiation

conducted; Humidity, Low Temperature Cycle, High Temperature Cycle, UV Exposure, and Salt Spray.

Salt Spray

48 hours continuous light spray consisting of 5% salt solution. This tests for resistance to the effects of an "aqueous salt atmosphere". It also gives a general indication of resistance to rusting.

Humidity

48 hours of cycling. Starts at 100% humidity @ 27 degrees C; goes to 95% @ 35degrees and goes back to 100% at 27 degrees. It is to indicate resistance to a warm humid atmosphere.

Solar Radiation

This test is run 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.

Low Temperature

This cycles from -6 degrees C to -19 degrees C (21F to -2F) for 48 hours. According to the Milspec document, this simulates acceptability in a mild climate such as "coastal Europe and southeast Australia". High Temperature -- This cycles from 32 C to 49C (90F to 120F) for 48 hours. This simulates acceptability in a Hot climate such as "North Africa, the Middle East, Pakistan, and India, southwestern US and northern Mexico".

IEC Water Splashing

The products passed a rating of IP-X4 (which is also the CEE rating in Europe). IP-X4 allows us to officially call them "splashproof". Although people may have different conceptions of the term "splashproof", this is the IEC and CEE definition of a "splashproof" rating.

What are the characteristics of the matching transformers in the EVID models?

EVID speakers incorporate high performance transformers that are very stable at all frequencies in their range and exhibit very little low-frequency saturation. The matching transformers in all the EVID units are designed to provide full rated output down to the low frequency limit in its specification with virtually no saturation. In addition, the insertion loss of less than 0.5 db is extremely low. This results in less heat generation, higher power transfer and more speaker efficiency.

In what application would I use the “t” versions rather than the 8 Ohm models?

In large wide area applications or where a large number of satellites are needed to cover odd shaped or multiple room you would use the “t” models. Also, where the

EVID Design and Installation Manual Page 8