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<blockquote data-quote="Eric Cagle" data-source="post: 81438" data-attributes="member: 277">Re: Temperature compensationAre we talking about setting up delay stacks and delaying to the backline or are we talking about the phase and frequency things that happen with the climate conditions? In my experience there is a wide range of times that will work with backline and speaker stack delay. I am familiar with the rane paper Arthur mentioned and it has more to do with phase and frequency changes due to absorbtion and speed of sound changes if I remember correctly. It is more of an EQ thing rather than a case of cabinets drifting out of alignment with the backline.As far as delaying to backline the reality of the beast is not near as complicated to set up as many people think. Calculations will get you in the ball park but actual listening is really easy and there is a range of several milliseconds that works just fine. In the case of delaying to the backline you are listening for the speakers to disappear. A drum kit works wonders to set up the delay time. It is almost like focusing a camera lens. As you change the delay time the sound will appear to stop coming out of the speakers and seem to all emanate from the kit itself. There is a range of over 10 milliseconds or more that is ideal. I have never tried to see how far that range is but I can promise it is over 10 milliseconds. When setting up delay stacks it is the same thing. When you no longer hear the delay speakers and only appear to hear the source you are done.Temperature and humidity do change things but I have never had the cabinets come out of the useable delay range. The big thing I have always noticed is the frequency change which is not subtle.</blockquote>

[QUOTE="Eric Cagle, post: 81438, member: 277"] Re: Temperature compensation Are we talking about setting up delay stacks and delaying to the backline or are we talking about the phase and frequency things that happen with the climate conditions? In my experience there is a wide range of times that will work with backline and speaker stack delay. I am familiar with the rane paper Arthur mentioned and it has more to do with phase and frequency changes due to absorbtion and speed of sound changes if I remember correctly. It is more of an EQ thing rather than a case of cabinets drifting out of alignment with the backline. As far as delaying to backline the reality of the beast is not near as complicated to set up as many people think. Calculations will get you in the ball park but actual listening is really easy and there is a range of several milliseconds that works just fine. In the case of delaying to the backline you are listening for the speakers to disappear. A drum kit works wonders to set up the delay time. It is almost like focusing a camera lens. As you change the delay time the sound will appear to stop coming out of the speakers and seem to all emanate from the kit itself. There is a range of over 10 milliseconds or more that is ideal. I have never tried to see how far that range is but I can promise it is over 10 milliseconds. When setting up delay stacks it is the same thing. When you no longer hear the delay speakers and only appear to hear the source you are done. Temperature and humidity do change things but I have never had the cabinets come out of the useable delay range. The big thing I have always noticed is the frequency change which is not subtle. [/QUOTE]

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