Onkyo TX-NR 646 clipping?

[curtis]

I am going to add one confusing fact, amplifier WPC ratings on receivers tend to be overstated...sometimes by a huge amount. There are no real regulations in place on how and manufacturer can state output, and some are more honest than others.

[Pogre]

I wouldn't use this as the gold standard, and keep in mind it assumes 8 ohm speakers (I subtract 3 dB sensitivity for 4 ohm speakers), but it can give you a rough idea of the power required to hit desired spl at your seat. Just fill in the boxes and click calculate.

http://myhometheater.homestead.com/splcalculator.html

[racrawford65]

Curtis is absolutely spot-on in his comment about manufacturers stretching the truth, some much more so than others.

[Pogre]

Curtis is absolutely spot-on in his comment about manufacturers stretching the truth, some much more so than others.

Yes, unfortunately there isn't much of a standard and another trend lately seems to be burying useful specs by including a bunch of useless specs for 1 channel driven, 6 ohm, with 1 kHz, etc. To me the 2 channel driven at full bandwidth spec is what matters most, but finding it can be a chore.

[racrawford65]

I wouldn't use this as the gold standard, and keep in mind it assumes 8 ohm speakers (I subtract 3 dB sensitivity for 4 ohm speakers), but it can give you a rough idea of the power required to hit desired spl at your seat. Just fill in the boxes and click calculate.

http://myhometheater.homestead.com/splcalculator.html

nice calculator... I can do roughly 110 db but don't think I'll try...at least until next time Ace of Spades is on the TT.

[Pogre]

nice calculator... I can do roughly 110 db but don't think I'll try...at least until next time Ace of Spades is on the TT.

I wouldn't count on hitting 110 dB or try to tho!

That's just gonna give you a rough estimate. It's not a perfect calculator as it doesn't allow for different impedances and uses 1 watt/meter instead of 2.83 V. Like I said, I cheat it a little by subtracting 3 dB from sensitivity for 4 ohm speakers. I usually click "away from walls" too, just to be safe.

[racrawford65]

not planning on it..just kidding. I value what's left of my hearing

[Qman]

An amplifier's job is to multiply the signal provided to it by the gain factor set by the volume control. You simply cannot say that one setting will yield no clipping and another will. The amplifier will *try* to amplify the input signal, no matter what it is, within some established range. An amplifier will clip based on the current drawn and the voltage limits at the power supply. The current drawn will depend on the load (speaker) Every speaker is different and will present a different load. You just have to listen for clipping, and back off for some headroom. That said, Pandora will be fairly compressed source.

[audiohead]

I wouldn't use this as the gold standard, and keep in mind it assumes 8 ohm speakers (I subtract 3 dB sensitivity for 4 ohm speakers), but it can give you a rough idea of the power required to hit desired spl at your seat. Just fill in the boxes and click calculate.

http://myhometheater.homestead.com/splcalculator.html

i cant upload a pic again?

inputs:
92db tower sensitivity
100 WPC
2 channel 2-4ft from wall + 106.7 ??? fine with me if that is true?

i screen shot my phone app SPL meter and Never get over 80db BUT it really is pretty loud and clean. I am certain i can hear if i am over driving them and it seems just fine?

calculating 106.7 and reading 80 is way off

[audiohead]

Agreed, plenty loud w/ good clean power. Although, I think audiohead was saying 80 db was loud enough for him... (well, it it's too loud, you're too old... JK). I, too, tend to listen at more sane volumes now-a-days unlike my youth...

ill pull this over here. lol, not too loud but do feel old lol

to clarify the 80db is the reading on my phone SPL meter! cant be near accurate with calculated at 106.7db.

when i stand in my listening position i am believing the 106!