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Is there any reliable evidence to show that IM in modern receivers is an audible problem? I'm not trying to be difficult, I'm actually curious if there is data to support that claim.

You can switch instantaneously between receiver and power amp, can you? :D If the pre-out/power amp combination results in a louder and therefore fuller sound, it's possible the gain was simply higher.

This article goes some distance in explaining the truth that people with excellent hearing acuity and training can discern audible differences that other people cannot even dream of. Like in electronics. Like amplifiers, source components and cables. Except it doesn't. People still can't...

Sure, how accurate are these clipping indicators really?

If the speakers were high-passed at some frequency and a subwoofer was used then I can believe it. Bass management FTW! :D However if the speakers were run full-range, listening to "Bass I love you", at high SPL levels, then I can imagine that 60 watts probably wouldn't be ideal to handle the...

I think you have misunderstood. His speakers have reached a peak SPL of 87 dB, so his amplifiers are probably only delivering a handful of watts. His subwoofers are providing the rest of the juice, as it were. An extra 20 dB louder, so he probably likes his bass a tad bit hot. :D His main...

I don't think anyone is disputing that clean power is preferable over distorted power. But there is a limit to how much clean power you need before it turns into a redundant numbers game. Headroom can make a difference assuming you push a system beyond the norm. Or it could be redundant, if...

Sure, but what if the levels aren't matched? If you don't account for that, then a louder gain will sound louder and you may not perceive a louder sound as just that - given the equal loudness curves and our sensitivity to loudness across the frequency range it may be that the sound takes on a...

I know it sounds rude, but I find it very difficult to believe people who routinely clip their amplifiers especially those who use bass management and subwoofers. There are so many things that could appear to be clipping but unrelated - it could have been the program material, or something...

I've read plenty of those threads. It could be due to people abusing their amplifiers. It could also be due to people shorting out their amplifiers. Who actually knows. I can't say that all receivers run hot. I used to own an Onkyo SR-876 receiver which got very hot to the touch, but never shut...

No offense but that's a very poor method of determining amplifier power. Given the unreliable nature of sighted comparisons one could draw several conclusions that are unrelated to the actual amplifier. One could misdiagnose the cause of the change in sound due to the gain structure of the...

If you clipped your receiver, as in actually clipped it into gross distortion, then your conditions are most likely atypical - not representative of how most reasonable people use their systems. How much power is "enough" is really dependent on listening habits, for the most part, and since...

I agree that 3 dB is noticeable. I guess I just don't think it's that much of a big deal.

In my opinion a peak SPL of 87 dB is not ridiculously loud, at least not for me. :) But you if measure 87 dB peaks, then I think your average level could be anywhere from 6-20 dB below that. Program material can vary so dramatically in level, so I'm really just speculating.

Sorry, not AcuDef... but if your speakers have a reasonable sensitivity (87 dB) and you are seated at a reasonable distance (3 meters) then you probably would need 1W or less once you factor in additional reinforcement from room gain and speakers placed in close proximity to wall boundaries. If...

I think a crest factor of 20 dB represents the extreme end of the dynamic range of recorded music.

Just going from 125 to 250WPC gains you nothing - if you haven't reached the full rated output of that amplifier and your speakers can output additional SPL without compression then yes, you're going to gain a whopping 3 dB. :D One could quadruple their amplifier power and the voltage swings...

3 dB sensitivity gain/loss would be a halving or doubling of amplifier power to maintain the same SPL. It's still not a significant difference. Yes, a doubling of voltage equates to a 6 dB increase, so 3 dB would be 50% of the measured level, but so what? All we care about is perceived volume -...

Nope. 100 times the average power!

Can you show me how you worked out your calculations?