Target values for a headphone amp? - diyAudio
Go Back   Home > Forums > Amplifiers > Headphone Systems

Headphone Systems Everything to do with Headphones

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 17th August 2006, 04:40 AM   #1
GD3 is offline GD3  United States
diyAudio Member
 
Join Date: Jan 2006
Location: Florida
Default Target values for a headphone amp?

I reposted my question from another forum, hope this is OK,

I'm designing an amp and I'm trying to gage the voltages I will need to drive different brands of 'phones to respecatble levels.

Grado (all) are 98dB at 1mv. At 32 ohms thats 31.2 nanowatts.??

Senn and AKG make 120 ohm models ranging from 101-104 dB at 1V. Thats 8.33 miliwatts.

Senn makes several at 300 ohms. Claiming 97dB at 1 volt. Thats 3.33 miliwatts.

So how is 31 nanowatts supposed to create a SPL in the same neighborhood as 3.3 miliwatts?

Thats a difference of a million to one. What I suspect is Grado is on crack.

But what I really want to know is how many (peak or RMS values, please) volts should an amp need to drive the 300 ohm Senns to raucous levels? What amps are you Sennheiser users listening to?
  Reply With Quote
Old 17th August 2006, 06:11 AM   #2
diyAudio Member
 
ifrythings's Avatar
 
Join Date: Oct 2005
You can probly get down to 1.5V battery cell to get the wattages you want, or 3V (2 battery cells).

I don't know a hole lot about headphone ratings but the power ratings you want can easily come from 1.5-5V supplies and give you more than enough power to make you loose your hearing.
  Reply With Quote
Old 17th August 2006, 08:06 AM   #3
jcx is offline jcx  United States
diyAudio Member
 
Join Date: Feb 2003
Location: ..
for headphones the usual unit is dB/mW, a few are rated in dB@ 1 V rms; but I have seen the obviously wrong dB/mV nonsense a couple of places

I posted this example calc on head-fi:

http://www6.head-fi.org/forums/showp...1&postcount=13

which also points to Headwize - giving you pretty much the best sources for headphone info on the web
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Laser target NinjaKitten Everything Else 16 4th January 2009 06:29 PM
Target Frequency Respons to design to arc2v Multi-Way 2 29th May 2007 12:38 PM
Target SD-2800 enter Solid State 2 21st January 2006 11:45 PM
Target SPL? MethMan Multi-Way 2 6th January 2006 04:32 PM


New To Site? Need Help?

All times are GMT. The time now is 03:41 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2