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post #256 of 14477

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post #257 of 14477
Quote:
Originally Posted by davidsh View Post
 

2 watts into 94 db/mW will yield 127 dB :o

 

SPL is 20log10(p/pref) dB.

20log10(2048/1) = +66 DB.

94 +66 = 160 dB, so we were both wrong. :normal_smile :


Edited by Don Hills - 2/13/14 at 4:02pm
post #258 of 14477
Quote:
Originally Posted by Don Hills View Post
 

 

SPL is 20log10(p/pref) dB.

20log10(2048/1) = +66 DB.

94 +66 = 160 dB, so we were both wrong. :normal_smile :

 

I get 127 dB as well.  Power is 10 times the log of the gain, not 20 (that's voltage).

 

(10 log 2000) + 94 = 133 dB.

post #259 of 14477
Quote:
Originally Posted by Don Hills View Post
 

 

SPL is 20log10(p/pref) dB.

20log10(2048/1) = +66 DB.

94 +66 = 160 dB, so we were both wrong. :normal_smile :

 

Originally Posted by JohnnyCanuck View Post
 

 

I get 127 dB as well.  Power is 10 times the log of the gain, not 20 (that's voltage).

 

(10 log 2000) + 94 = 133 dB.

That's gonna hurt a lot :eek: Does that mean that 1 W is enough?


Edited by StanD - 2/13/14 at 4:24pm
post #260 of 14477
Quote:
Originally Posted by StanD View Post
 

That's gonna hurt a lot :eek: Does that mean that 1 W is enough?

 

Nah.  You don't want to compress the peaks -- go for the 2 W.  Just don't turn the volume control to 11.

post #261 of 14477
Quote:
Originally Posted by JohnnyCanuck View Post
 

 

I get 127 dB as well.  Power is 10 times the log of the gain, not 20 (that's voltage).

 

(10 log 2000) + 94 = 133 dB.

10*log(2000) = 33 if my mind don't fail me.

(33+94) dB = 127dB :) 

 

If we were talking these numbers for speakers we would be dubbed insanse, lol. For a 90 dB/W speaker we would be talking 8500 watts to reach 127 dB.


Edited by davidsh - 2/13/14 at 4:55pm
post #262 of 14477
Quote:
Originally Posted by JohnnyCanuck View Post
 

 

I get 127 dB as well.  Power is 10 times the log of the gain, not 20 (that's voltage).

 

(10 log 2000) + 94 = 133 dB.

 

 

Quote:
Originally Posted by StanD View Post
 

That's gonna hurt a lot :eek: Does that mean that 1 W is enough?

 

 

Quote:
Originally Posted by JohnnyCanuck View Post
 

 

Nah.  You don't want to compress the peaks -- go for the 2 W.  Just don't turn the volume control to 11.

So who's got an audio chain with an SNR that's that good? Who's got a compressor or limiter in their chain? I've got a toenail clipper handy.

post #263 of 14477
Quote:
Originally Posted by StanD View Post
 
 
Warning: Spoiler! (Click to show)
Quote:
Originally Posted by JohnnyCanuck View Post
 

 

I get 127 dB as well.  Power is 10 times the log of the gain, not 20 (that's voltage).

 

(10 log 2000) + 94 = 133 dB.

 

 

Quote:
Originally Posted by StanD View Post
 

That's gonna hurt a lot :eek: Does that mean that 1 W is enough?

 

 

Quote:
Originally Posted by JohnnyCanuck View Post
 

 

Nah.  You don't want to compress the peaks -- go for the 2 W.  Just don't turn the volume control to 11.

 

So who's got an audio chain with an SNR that's that good? Who's got a compressor or limiter in their chain? I've got a toenail clipper handy.

It's all about headroom :rolleyes:

Really, the 1-2W thing is just a guide line, as with most specs that manufacturers give us, we don't know what the distortion is at the specified output level, nor how it behaves relative to output level.

post #264 of 14477
Quote:
Originally Posted by davidsh View Post
 

10*log(2000) = 33 if my mind don't fail me.

(33+94) dB = 127dB :) 

 

If we were talking these numbers for speakers we would be dubbed insanse, lol. For a 90 dB/W speaker we would be talking 8500 watts to reach 127 dB.

 

You're correct.  I calculated the numbers correctly but my fingers screwed me up when I typed my reply.

post #265 of 14477
Quote:
Originally Posted by StanD View Post
 

 

 

 

 

So who's got an audio chain with an SNR that's that good? Who's got a compressor or limiter in their chain? I've got a toenail clipper handy.

 

 

Quote:
Originally Posted by davidsh View Post
 

It's all about headroom :rolleyes:

Really, the 1-2W thing is just a guide line, as with most specs that manufacturers give us, we don't know what the distortion is at the specified output level, nor how it behaves relative to output level.

Let's see, I plug my HE-500's into my Asgard 2 (1 W), I turn it up real loud and I don't hear clipping on the peaks. I can turn it up much louder ans still not hear any clipping but I don't want to get hearing loss or feel uncomfortable. 1 Watt is plenty. How many audio chains have an SNR of 120 dB, how many recordings have such a SNR or usable dynamic range? Most of the crap we listen to is compressed and limited. If I'm listening to classical music must I turn it up so loud as to hear some guy in back of the orchestra cut a fart while the orchestra is playing? IMO, this is where everyone starts dreaming of things that have little practical value.

OK fellas, it's time to cut the Schiit and let this thread return to normal. :D


Edited by StanD - 2/13/14 at 5:28pm
post #266 of 14477
Quote:
Originally Posted by StanD View Post
 
 
Warning: Spoiler! (Click to show)
Quote:
Originally Posted by StanD View Post
 

 

 

 

 

So who's got an audio chain with an SNR that's that good? Who's got a compressor or limiter in their chain? I've got a toenail clipper handy.

 

 

Quote:
Originally Posted by davidsh View Post
 

It's all about headroom :rolleyes:

Really, the 1-2W thing is just a guide line, as with most specs that manufacturers give us, we don't know what the distortion is at the specified output level, nor how it behaves relative to output level.

Let's see, I plug my HE-500's into my Asgard 2 (1 W), I turn it up real loud and I don't hear clipping on the peaks. I can turn it up much louder ans still not hear any clipping but I don't want to get hearing loss or feel uncomfortable. 1 Watt is plenty. How many audio chains have an SNR of 120 dB, how many recordings have such a SNR or usable dynamic range? Most of the crap we listen to is compressed and limited. If I'm listening to classical music must I turn it up so loud as to hear some guy in back of the orchestra cut a fart while the orchestra is playing? IMO, this is where everyone starts dreaming of things that have little practical value.

 

Distortion rises with output generally speaking.. So it might not be clipping but the distortion figures would probably increase. Whether that is something the human ear can perceive... I don't really know.

post #267 of 14477
Quote:
Originally Posted by davidsh View Post
 

Distortion rises with output generally speaking.. So it might not be clipping but the distortion figures would probably increase. Whether that is something the human ear can perceive... I don't really know.

Yes I'm sure that I'll notice the slight rise from 0.008% to 0.05% THD while I'm clutching my nutz in pain. :eek:

Enough already.


Edited by StanD - 2/13/14 at 5:38pm
post #268 of 14477
Quote:
Originally Posted by madwolfa View Post
 

My hybrid X-CAN V3 output is rated 1W (not sure @ which impedance). With my HD600 (300 Ohm) I'm only using 1/8 of a volume pot (-54 dB)... otherwise my cans turn into a pair of small loudspeakers.

 

My HD650s used to sound harsh and lean when I cranked it up.  I thought it was how this headphone behaved.  It did it on my XcanV3 and Lehmann BCL.  It's not the headphone, it's the amps.  Once I got a headphone amp capable of massive power...the HD650 was capable of much more.  Ditto my K701s.

post #269 of 14477

To everyone calculating the SPL: Remember it's Sound Pressure, not Sound Power. 20 log10, not 10 log10.

So 160 dB, not 127 dB.  http://en.wikipedia.org/wiki/Sound_pressure

Feel free to PM any replies to me rather than clutter the thread.

 

As has been pointed out to me, I forgot to convert voltage ratio to power ratio. 127 dB it is. Sorry about that. Shutting up now...


Edited by Don Hills - 2/15/14 at 1:18am
post #270 of 14477
Quote:
Originally Posted by TK277 View Post
 

 

 

I can also see hip types wearing a 5-panel

 

 

 

Do you know the name of the font used?

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