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In Reply to: Re: How much power do you really need?? Honestly? posted by Time_Stands_Still on March 24, 2007 at 13:23:16:
doubting that your listening position is about 40" from the speaker let le alude to the fact that the volume you are speaking of is an inverse proportional square the further you are from the face of the speaker. In other words to hear 100db at one meter you might need twenty watts, but at three meters you might need 200 watts (just pulling numbers out of the air for an example).
As for how much power do you really need, I'd like to say as much as it takes to make your speakers play their rated spectrum plus maybe 25%. An example of this is that right now I'm playing Kinda Blue thru a pair of Soliloquy 5.0 monitors being driven by a pair eight watt amps. Think they'd sound better with a 25 watt amp, but see absolutly no need for a 50 watt amp.
gary
Follow Ups:
And most of our listening rooms form a reverberant field. So the SPL decreases less than the inverse square of the distance. You should take your RS SPL meter and measure this some time--FM hiss will do fine.
____________________________________________________
"Opposition brings concord. Out of discord comes the fairest harmony."
------Heraclitus of Ephesis (fl. 504-500 BC), trans. Wheelwright.
87DB speakers in a pair at 6.6 ft and a 100WPC amp the calculated reading was 106.9 factoring the speakers would typically be near a wall. So my basic listing matches pretty closely what a person sitting about 7 ft away from a pair of speakers may get in terms of watts and SPL in DB.
Interesting! I bookmark it thanks
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