device to protect subs at speaker level

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Ok, i saw this just now, but apparently someone had posted in another section of DIY forum on 02/12 and nobody chimed in
and this was posted on June 2011
http://www.fohonline.com/home/72-product-focus/5273-eminence-d-fend-for-loudspeaker-protection.html

I am talking about this
D-fend? Loudspeaker Protection Technology | Eminence Speaker

these guys uses MOSFET transistor to do some kind of PWM
it is microprocessor controlled and power itself from the speaker voltage :)

looks very good, i dont know how much it cost or if eminence can sold to end users


Max.
 
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