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[Tim Brackett]

I would be interested in seeing results from high density plastic such as those very thin trash can liners.  In my experience they seem to do less damage than heavier plastic like your typical trash bag.  

[Art Welter]

Tim Brackett wrote on Wed, 19 January 2011 12:14

I would be interested in seeing results from high density plastic such as those very thin trash can liners.  In my experience they seem to do less damage than heavier plastic like your typical trash bag.

At 1.1 mil, the thinner stuff I used is pretty thin, I think anything thinner would not be durable enough to use in bad weather.
It was only slightly less bad than the thick stuff   .

How thin are the liners you are talking about ?

[Dave Rickard]

Moby (Mike Diack) wrote on Tue, 18 January 2011 00:04

Interesting...apart from the response issue, If you use a tight garbage bag you end up with the worlds biggest kazoo. There must be something that lets noise through but not wetness. M

Anyone heard these?

http://www.undercovernyc.com/protection_ranges#fs_w

[frank kayser]

I read about those the other day - I did like the idea - it would be interesting to see the effect.

[Bennett Prescott]

Dave Rickard wrote on Sat, 29 January 2011 00:09

Anyone heard these? http://www.undercovernyc.com/protection_ranges#fs_w

Heh, I've heard them, and in fact that rig in that configuration where that picture was taken. They work very well. If there is a HF reduction I was unable to measure it reliably, so maybe 1dB?

[Art Welter]

Bennett Prescott wrote on Sat, 29 January 2011 14:27

Dave Rickard wrote on Sat, 29 January 2011 00:09 Anyone heard these? http://www.undercovernyc.com/protection_ranges#fs_w Heh, I've heard them, and in fact that rig in that configuration where that picture was taken. They work very well. If there is a HF reduction I was unable to measure it reliably, so maybe 1dB?

Pretty cool trick, wonder how they manage to let sound waves pass unobstructed but stop water molecules?

The website says very little.

[Dave Rickard]

Art Welter wrote on Sun, 30 January 2011 12:13

Bennett Prescott wrote on Sat, 29 January 2011 14:27 Dave Rickard wrote on Sat, 29 January 2011 00:09 Anyone heard these? http://www.undercovernyc.com/protection_ranges#fs_w Heh, I've heard them, and in fact that rig in that configuration where that picture was taken. They work very well. If there is a HF reduction I was unable to measure it reliably, so maybe 1dB? Pretty cool trick, wonder how they manage to let sound waves pass unobstructed but stop water molecules?

I think the fabric is woven from Elvish thread...  

[Scott Raymond]

Dave Rickard wrote on Sun, 30 January 2011 16:43

Art Welter wrote on Sun, 30 January 2011 12:13 Bennett Prescott wrote on Sat, 29 January 2011 14:27 Dave Rickard wrote on Sat, 29 January 2011 00:09 Anyone heard these? http://www.undercovernyc.com/protection_ranges#fs_w Heh, I've heard them, and in fact that rig in that configuration where that picture was taken. They work very well. If there is a HF reduction I was unable to measure it reliably, so maybe 1dB? Pretty cool trick, wonder how they manage to let sound waves pass unobstructed but stop water molecules? I think the fabric is woven from Elvish thread...

The first thing I thought of was Gore-Tex that lets water vapor out and keeps the rain off, but I can't see Gore-Tex being very acoustically transparent.  

Scott

[Chris Hindle]

Dave Rickard wrote on Sun, 30 January 2011 17:43

Art Welter wrote on Sun, 30 January 2011 12:13 Bennett Prescott wrote on Sat, 29 January 2011 14:27 Dave Rickard wrote on Sat, 29 January 2011 00:09 Anyone heard these? http://www.undercovernyc.com/protection_ranges#fs_w Heh, I've heard them, and in fact that rig in that configuration where that picture was taken. They work very well. If there is a HF reduction I was unable to measure it reliably, so maybe 1dB? Pretty cool trick, wonder how they manage to let sound waves pass unobstructed but stop water molecules? I think the fabric is woven from Elvish thread...

I'm thinking more along the lines of a very specific material, in a very specific weave using the waters' surface tension to do the blocking.

[Too Tall (Curtis H. List)]

Tom Reid wrote on Tue, 18 January 2011 12:21

Moby (Mike Diack) wrote on Tue, 18 January 2011 01:04 Interesting...apart from the response issue, If you use a tight garbage bag you end up with the worlds biggest kazoo. There must be something that lets noise through but not wetness. M Cheesecloth? Or a wall of fire.

This is why you do not use front loaded cones outdoors.
I also have done my fair share of rain dates, but we never put tarps over the front of the PA.
Only the top and back where the power amps racks live.

The High frequency horn were fairly deep and the 15" cones were build back into the cabinets to physically time align the speaker.
Add using expanded metal and foam on the inside water from a hose never touched the 15" cone drivers.
The subs were also horn loaded.

This is a problem for any company that has only front load drivers. Rationalize as you will, if you put a tarp over the PA the system should be off. The output with tarp is unacceptable.

Forgive me for being out of touch, I just remembered that many line array boxes have front loaded low-mid and they are everywhere.

OUCH!!!

how many drivers are lost to rain?

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