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Sennheiser HD 600 Impressions Thread - Page 565

post #8461 of 8606
Quote:
Originally Posted by StanD View Post
 

That's right they are more sensitive than most people realize, The HD600's SPL is 112dB per Volt or 106.8 dB per mW.

So one can get to 120 dB SPL with 21 mW using an amp that can reach 2.5 V RMS.

 

 

Quote:
Originally Posted by HaVoC-28 View Post
 

 

Hum i think you picked up HD598 sensitivity .

HD600 => 97 mW/dB   //   102 dB/V .    

For reaching 120 dB it needs something around 200mw  and 7.95v .

Nope, I'm correct, the below is copied and pasted directly from the HD600's specification taken from the Product Sheet (PDF) from Sennheiser's website. You can get that yourself if you wish.

http://en-us.sennheiser.com/downloads/92eb813de08987eaedf66b9777bd6bdc.pdf

Characteristic SPL .....................................112 dB (at 1 kHz, 1 Vrms)

Edit: The HD598 happens to have the same sensitivity but at a different impedance, 50 Ohms.


Edited by StanD - 8/29/14 at 7:32am
post #8462 of 8606
Quote:
Originally Posted by HaVoC-28 View Post
 

 

Hum i think you picked up HD598 sensitivity .

HD600 => 97 mW/dB   //   102 dB/V .    

For reaching 120 dB it needs something around 200mw  and 7.95v .

 

 

Quote:
Originally Posted by Tuco1965 View Post
 

That sounds about right for the sensitivity.

Nope. See my my response, just prior to this post.

post #8463 of 8606
Quote:
Originally Posted by StanD View Post
 

 

 

Nope. See my my response, just prior to this post.

http://en-uk.sennheiser.com/best-audio-headphones-high-end-stereo-hifi-hd-600

 

Check the Technical data

post #8464 of 8606
Quote:
Originally Posted by Tuco1965 View Post
 

http://en-uk.sennheiser.com/best-audio-headphones-high-end-stereo-hifi-hd-600

 

Check the Technical data

I got my information directly from the product sheet, not from a web page that someone non technical simply typed in. One of the two has to be wrong. In either case even if at 97 dB/mW the HD600's are not insensitive as some may say.

Let's say that it is 97 dB/mW, which would be 102.2 dB/V or 200mW for 120 dB SPL at 7.7V RMS. I believe a  FiiO E12 can do that, a Schiit Magni at $99 USD can do that. Few people listen at average levels that require headroom that reaches 120 dB, especially if one listens to contemporary music that has moderate levels of compression (volume). If Sennheiser's product sheet is correct, you can download that using the link I previously provided, then it's pretty easy to drive. I've had an easier time driving my HD600's from numerous amps than I expected from reading all the posts saying that it is particularly hard to drive.

In any case you have to admit, these are great headphones.


Edited by StanD - 8/29/14 at 8:13am
post #8465 of 8606

I posted the link because that was the spl spec that I always knew.  

 

They are great headphones.  :bigsmile_face:

post #8466 of 8606
Quote:
Originally Posted by Tuco1965 View Post
 

I posted the link because that was the spl spec that I always knew.  

 

They are great headphones.  :bigsmile_face:

That's a biggie that's not contestable, great headphones.

post #8467 of 8606

And i am almost sure that The booklet of my HD600 say : 97dB/mW :blink: , but it's at my friend house so i should cheak it with him later , futhermore when i had  DT-880 250 ohms i didn't have to ajust the volume pot , it was close enough volume wise) so i think that the HD600 sensitivty is something around 97 dB/mW or 102 dB/V as i posted before .

 

I think that the product sheet is wrong :redface: .

 

Let's look at innerfidelity numbers :

 

http://www.innerfidelity.com/images/SennheiserHD600.pdf

http://www.innerfidelity.com/images/SennheiserHD598.pdf

 

 

If HD600 sensitivity was 112 dB /V to reach 90 dB we should need something like : 0.08v 

With 102 dB/V for 90 dB we get about : 0.25v

 

(wich is much closer to innerfidelity numbers) .

 

 

 

Anyway even with 97 dB/mW of sensitivity my HD600 is easy to get loud (and sound good with any sources that i have) .

 

At least everyone agree here that HD600 is awesome :bigsmile_face: 


Edited by HaVoC-28 - 8/29/14 at 8:50am
post #8468 of 8606
Quote:
Originally Posted by StanD View Post
 

That's a biggie that's not contestable, great headphones.

 

Mine are going to get a workout tonight. New Tom Petty and New Eric Clapton and Friends.  Damn good!

post #8469 of 8606
Quote:
Originally Posted by HaVoC-28 View Post
 

And i am almost sure that The booklet of my HD600 say : 97dB/mW :blink: , but it's at my friend house so i should cheak it with him later , futhermore when i had  DT-880 250 ohms i didn't have to ajust the volume pot , it was very close volume wise) so i think that the HD600 sensitivty is something around 97 dB/mW or 102 dB/V as i posted before .

 

I think that the product sheet is wrong :redface: .

 

Let's look at innerfidelity numbers :

 

http://www.innerfidelity.com/images/SennheiserHD600.pdf

 

http://www.innerfidelity.com/images/SennheiserHD598.pdf

 

 

Anyway even with 97 dB/mW of sensitivity my HD600 is easy to get loud (and sound good with any sources that i have) .

 

 

At least everyone agree here that HD600 is awesome :bigsmile_face: 

So either way it's loud or even louder. I can go with that. :wink_face:

post #8470 of 8606
Hmmm i opened my HD600 manual and the specs say sensitivity at 1 kHz is 97dB...

So the manual is wrong I guess?
post #8471 of 8606
Quote:
Originally Posted by kaixax555 View Post

Hmmm i opened my HD600 manual and the specs say sensitivity at 1 kHz is 97dB...

So the manual is wrong I guess?

 

HD650 are at 102dB, according to spec sheet. And it's a known fact, they're slightly more sensitive, than HD600. So 97dB looks like a right number.

post #8472 of 8606

Interesting is that with my LCD-2 while being much less sensitive (93dB), I'm using the same volume pot range on my Asgard 2 (in low gain) as with HD650.

Probably it has something to do with much lower impedance as well (70 Ohm vs 300 Ohm).

post #8473 of 8606
Quote:
Originally Posted by kaixax555 View Post

Hmmm i opened my HD600 manual and the specs say sensitivity at 1 kHz is 97dB...

So the manual is wrong I guess?

Look at this link. http://en-us.sennheiser.com/downloads/92eb813de08987eaedf66b9777bd6bdc.pdf

I might call Sennheiser and ask them about it.


Edited by StanD - 8/29/14 at 9:49pm
post #8474 of 8606

97dB/mW is the important qualifier

 

Although unless I'm mistaken voltage sensitivity is closer to 102dB/V. Not sure where the discrepancy is coming from

post #8475 of 8606

I have sent the below message to Sennheiser at their USA website. Let's see how they respond. Since all other information on their websites say otherwise, perhaps their product sheet is in error.

 

The product sheet at http://en-us.sennheiser.com/downloads/92eb813de08987eaedf66b9777bd6bdc.pdf indicates the the HD600's sensitivity is 112 dB (at 1 kHz, 1 Vrms). Other parts of Sennheiser's web sites worldwide indicate a lower sensitivity of 97 dB/mW which is 102 dB/V. What is the correct specification? Please correct whatever information you have made available on Sennheiser's web sites. Thank you.

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