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Old 05-11-2008   #25
Join Date: May 2008
Location: Delhi, India
Posts: 26
Default Re: Pairing Amps with Speakers

Originally Posted by CharlyD View Post
The interaction between an amplifier and a speaker can be quite complex. While speaker sensitivity is the most critical factor, parameters such as speaker impedance and phase can also be critical. The JBL's you're considering, however, have very well-behaved impedance and are easy to drive. If the speaker sensitivity is rated at 90dB/1W/1m, and you'd like to achieve a volume level of 110dB (quite loud) you'll need at least 100WPC. The easy calculation is:

Pout = 10 ^ ((dBmax - dBsens) / 10)

If dBsens (dB out at 1W) = 90dB and dBmax (SPL goal) = 110dB

Pout = 10 ^ ((110 - 90) / 10) = 100Watts
Wow! That's a great response! Thanks! Now I can do a maths while looking at various amp/ receivers.
Question - if I buy an AVR with 40WPC for now, could my speakers fry the AVR? Or vice versa?

Can someone also advice me on how to reuse an old AVR when upgrading with a new one? Here is the post -
thanks and regards

Last edited by anm; 05-11-2008 at 11:19 PM..
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