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= HiFiMAN HE-560 Impressions & Discussion Thread = - Page 799

post #11971 of 11977
Quote:
Originally Posted by headwhacker View Post
 

 

You can't just derive the amount of current a headphone needs just by their load resistance/impedance. Sensitivity plays a bigger role than impedance alone which will determine how much power is required to drive a phone at a given SPL. 

 

Higher impedance load requires less current and more voltage. The opposite is true for low impedance phone, current becomes important than voltage. Either way you should check the sensitivity of the headphone first . HE-560 at 90dB/mW is considered low sensitivity. I bet your vintage HP is just more sensitive than HE-560 that is why it is louder.

 

 

EDIT: 

 

AKG 340 Hybrid - Sensitivity: 94 dB / mW

 

Hifiman HE-560 - Sensitivity: 90 dB /mW

Good point! V=IR

post #11972 of 11977
 

 

Quote:
Originally Posted by ModMax View Post


HiFiMAN specs the HE-560 at 50 +/-8 ohms

 

All the sources I find, including Hifiman here: 

 

say 35 ohms. I know the actual product page says 50 +/-8 ohms but I don't know why that page shows that and none of the other sources do.

 

 

Quote:
Originally Posted by headwhacker View Post
 

 

You can't just derive the amount of current a headphone needs just by their load resistance/impedance. Sensitivity plays a bigger role than impedance alone which will determine how much power is required to drive a phone at a given SPL. 

 

Higher impedance load requires less current and more voltage. The opposite is true for low impedance phone, current becomes important than voltage. Either way you should check the sensitivity of the headphone first . HE-560 at 90dB/mW is considered low sensitivity. I bet your vintage HP is just more sensitive than HE-560 that is why it is louder.

 

I will add to this point by saying I recently found out impedance has a nothing to do with amping requirements for orthodynamic headphones compared to dynamic headphones. Because they are a purely resistive load, they have a flat impedance curve and thus, are unaffected by the damping factor. So like the previous post says, sensitivity plays a bigger part in amping needs for orthos.

 

http://www.head-fi.org/t/617902/effects-of-damping-factor-on-planar-magnetics-orthodynamics#post_8520457


Edited by DreamKing - Yesterday at 11:53 pm
post #11973 of 11977
Quote:
Originally Posted by DreamKing View Post

All the sources I find, including Hifiman here: 



say 35 ohms. I know the actual product page says 50 +/-8 ohms but I don't know why that page shows that and none of the other sources do.



I will add to this point by saying I recently found out impedance has a nothing to do with amping requirements for orthodynamic headphones compared to dynamic headphones. Because they are a purely resistive load, they have a flat impedance curve and thus, are unaffected by the damping factor. So like the previous post says, sensitivity plays a bigger part in amping needs for orthos.

http://www.head-fi.org/t/617902/effects-of-damping-factor-on-planar-magnetics-orthodynamics#post_8520457

HE-560 is 50 ohm +/- 8 ohms. Look at innerfidelity's measurements. The unit measured 43 ohms.
post #11974 of 11977
Quote:
Originally Posted by DreamKing View Post
 

 

 

I will add to this point by saying I recently found out impedance has a nothing to do with amping requirements for orthodynamic headphones compared to dynamic headphones. Because they are a purely resistive load, they have a flat impedance curve and thus, are unaffected by the damping factor. So like the previous post says, sensitivity plays a bigger part in amping needs for orthos.

 

http://www.head-fi.org/t/617902/effects-of-damping-factor-on-planar-magnetics-orthodynamics#post_8520457

Yes, but note that a 42 Ohm HE560 will likely be significantly louder from a 58 Ohm HE560

post #11975 of 11977
Quote:
Originally Posted by DreamKing View Post
 

 

All the sources I find, including Hifiman here: 

 

say 35 ohms. I know the actual product page says 50 +/-8 ohms but I don't know why that page shows that and none of the other sources do.

 

 

IIRC, they were first advertised as 35 ohms, and listed that way on head-direct, then the head-direct listing changed.  So all those other places that went with the original spec never changed their listings.  Hardly surprising.  Most people are slackers at heart, even if they're running a business.

post #11976 of 11977
Quote:
Originally Posted by ThurstonX View Post
 

 

IIRC, they were first advertised as 35 ohms, and listed that way on head-direct, then the head-direct listing changed.  So all those other places that went with the original spec never changed their listings.  Hardly surprising.  Most people are slackers at heart, even if they're running a business.


So very true. I hate finding a site that puts the absolute least possible effort into describing an item. A web page is a sales presentation and should be treated as such. I'm always glad for the lazy out there as the actually help increase business for those willing to put in some effort.

post #11977 of 11977
^Found an incredible "bass test track" on TIDAL's Texas Playlist. Not really my type of music, but it will rattle your head on the 560's, Stars of the Lid, " Austin Texas Mental Hospital, Part. 3", turn the volume down!!!
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