Originally Posted by Feregorn
But having more power doesn't mean better control over the sound on lower listening levels too? Plus when you invite people over, more power is important in order to fill the room with sound at similar listening levels... Isn't that right?
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When you say fill the room with sound at similar listening levels, what level would that be?
To help determine this, the reference level in movies is mixed around 85dB on average with +20dB headroom to taken into account the dynamics in the movie soundtrack. That means peak of 105dB at the Main Listening Position (MLP). Most people would consider reference level to be too loud and turn it down a bit, i.e. -10dB based on the reference scale.
To check if your Klipsch RP-280f can reach reference level, use the following online calculator: http://myhometheater.homestead.com/splcalculator.html
. Based on Klipsch's datasheet
, the RP-280f has a sensitivity of 98db/W/m. Just plug in the parameters of
(a) power requirement;
(b) the number speakers;
(c) the distance between the speakers and MLP; and
(d) placement within the room.
It will work out the SPL. Target is to reach 105dB.
Using the following parameters of (a) = 25W, (b) = 2, (c)=10 feet and (d)= away from walls, the Klipsch RP-280f gets to 105dB. Which means it can reach reference level without much power. Based on your room and speaker placement, how much power is needed?
Another thing to consider is when implementing bass management. By diverting the power hunger low frequencies to the more capable sub(s) with it's own built in amplifier (i.e. with a crossover frequency of say 80Hz), one can effectively reduce the power requirement by 50%.
Please note that music has generally a lower dynamic range compared to a movie soundtrack. I.e. most of the time the song is well within +20dB of the average level. To check the dynamic range of a song, put the tune through the dynamic range meter of an app such as Foobar2000. It's surprising what the results are.