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Re: Hissing from Quad 63s - reason?

Posted by kentaja@yahoo.com (M) on April 16, 2007 at 10:26:18

In Reply to: Hissing from Quad 63s - reason? posted by copydex on April 16, 2007 at 09:50:56:

You have identified the most likely problem. High humidity conditions will make the 63 panels produce some hiss. The higher the humidity, the worse the hiss. High temps alone will not produce hiss. This does vary quit a bit from speaker-to-speaker. Some are worse than others. When the humidity drops, the hiss should disappear.

Generally the hiss will come from the ends of the panel where the conductive coating stops on the film. This is the typical leak point. As the humidity goes higher and the hiss becomes worse, it will sound like the entire panel(s) is hissing. The hiss is audible evidence of excessive panel leakage.

Try to keep your RH levels below 60%. This should stop the hissing.

This is not hard to do for most folks. Cold winters and forced air heat will keep inside RH levels well below 60% even with a humidifier is most cases. And high summer heat and central AC will generally keep the RH levels low enough as well. Spring and fall can be tough with more precipitation and the tendency to want to throw open the windows!

This post is made possible by the generous support of people like you and our sponsors:

Analog Engineering Associates

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