IEC Loudspeaker Rating |
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Conanski
Old Croc Joined: 26 January 2006 Location: Ottawa, Canada Status: Offline Points: 2515 |
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Posted: 15 November 2017 at 11:48pm |
All you have to do is look at the drivers in this box, they aren't highend so this box won't tolerate a lot of power or abuse. I suggest treating they have a 350w program rating where one could use a 500w amp but only with dynamic program material. |
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DMorison
Old Croc Joined: 14 March 2007 Location: Aberdeen Status: Offline Points: 1647 |
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Depends which version of AES you're referring to? The original 1984 version used the same crest factor and HPF/LPF slopes as IEC, but only one decade rather than the "decade and a little bit" of the IEC. It's also only run for 2 hrs rather than the 8hrs JBL talk about. It also starts at the LF limit of the box, rather than at a standardised 40Hz, so the IEC may apply much more stress to drivers that are in boxes tuned higher than this. The 2012 update of AES increases the crest factor, and also uses steeper slopes. That means a driver rated with this procedure can withstand higher peaks (along with the stated average), but has had more protection from overexcursion during the test. Therefore, it doesn't necessarily tell you how well the box will handle mis-use eg if you were to hook it up to an amp without an HPF etc. The nice thing about standards is there are just soo many to choose from (© Ivan Beaver, 1903) Edited by DMorison - 14 November 2017 at 3:20pm |
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AJ113
Registered User Joined: 11 March 2016 Location: Hull UK Status: Offline Points: 123 |
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Yes I've read that already thank you. On that basis do you think that 350 watts AES is equivalent to 350 watts IEC?
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DMorison
Old Croc Joined: 14 March 2007 Location: Aberdeen Status: Offline Points: 1647 |
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AJ113
Registered User Joined: 11 March 2016 Location: Hull UK Status: Offline Points: 123 |
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I have a pair of JBL M350s which are in good working order. They are rated at 350 watts IEC. Bearing in mind the rigorous standards of IEC testing I assume the IEC rating is equivalent to a higher AES rating. I'm just wondering how much power to deliver, I don't want to wreck them.
Is there an accepted rule of thumb for comparing IEC to AES/RMS? |
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