Question:  

Are the CBT's outdoor-rated?

Answer:

Yes, they are rated IP-54, per IEC 529.   The first character, “5", indicates that the speaker is protected against damage from solid foreign objects greater than 1 mm (0.04 inches) in diameter and protected from dust (not dust-tight, but dust-protected).   The second character, “4", indicates that it's protected against damage from splashing water.

In addition, CBT speakers have passed longer than industry standard tests for UV and salt-spray (The industry standard is between 2 and 8 hours testing.  We went all out and tested CBT's for 200 hours for each factor – UV and salt spray).

Here are some factors that make CBT's great for outdoor use.   The cabinets are glass-filled ABS plastic with maximum UV additive.   The grilles are made of non-rusting aluminum, which are painted with a high-quality polyester paint that stretches rather than cracking.   The drivers are treated for outdoor use, so they are as weather resistant as polyurethane cones. The backs of the tweeters on the CBT 70J are fitted with weather covers.   All the external screws are stainless steel.