Alright, let's check the numbers.
Shinyav (to whom I was replying), says he's sitting 7ft from his fs52s. Let's be extra generous and call that 2m.
The fs52 has a rated sensitivity of 87dB at 2.83V. We'll assume they used the standard 1m for that.
2.83V into a 6Ohm load (again from the speaker's spec sheet) is 1.33W
So at 1.33W input power, applying 6dB drop for doubling the distance to 2m, the speaker should put out 81dB to his listening position.
From here we'll start cranking up the power. Apply 10X the power for 10dB increase, 2x the power for 3dB increase, or 1.26x the power for 1dB increase.
Our goal is to hit reference level output, defined as 105dB peaks.
1.33W -> 81dB
13.3W -> 91dB
133W -> 101dB (Uh oh, we just blew past the speaker's rated power.)
266W -> 104dB
335W -> 105dB
So there you have it. It takes an estimated 335W to hit reference peaks with a fs52 at Shinyav's relatively close listening position. That's assuming that you're fine with ZERO headroom. What amplification are you using to provide 335 clean Watts per channel? That kind of power is hard to come by. How do the speakers like being driven at nearly 3X their rated power handling (130W)? The surround channels, with their lower sensitivity AND longer listening distance, end up needing well more than double the power for the floor standers to hit reference. Keep in mind that they're rated for much less power.
Yes I realize that there are a lot of unknowns related to listening environment, program material, real impedance curves, etc. But the main point still stands. These speakers have sensitivity way too low to play reference levels. It's just not realistic, and it's not what they were made to do.
Look I own a set of the Pioneer speakers and still use them in one of my setups. They're great at what they do and at what they cost. But sometimes this discussion gets a bit carried away. There's nothing wrong with having some pride in the purchase decisions you made. You did make a great choice for how to spend your money. But these speakers are not the greatest speakers out there. They're a compromise, just like everything else. Part of that compromise is not hitting reference.
Edited by pitviper33 - 11/12/12 at 6:58am