The Objective2 (O2) Headphone Amp DIY Project - Page 94 - 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 28th November 2011, 05:03 PM   #931
Turbon is offline Turbon  Sweden
diyAudio Member
 
Turbon's Avatar
 
Join Date: Aug 2011
Location: South
Actually I have no idea of who that might be... ;-)

Now, I hope this OT didn't bother you to much RS.
  Reply With Quote
Old 28th November 2011, 05:34 PM   #932
diyAudio Member
 
RocketScientist's Avatar
 
Join Date: Mar 2008
Location: Northwest
Quote:
Originally Posted by qusp View Post
ii have the correct hiface OEM usb-i2s module to drop on it already, so its an easy simple solution at less than 100 for a compact hires 2 channel USB dac
Is that module generally available in single piece quantities to DIYers? What USB chip is it based on? Does it provide MCLK for the DAC? And does it require a proprietary driver or is it fully UAC1 compliant?
__________________
http://nwavguy.com - Personal non-commercial audio blog
  Reply With Quote
Old 28th November 2011, 06:33 PM   #933
diyAudio Member
 
Join Date: Nov 2011
Location: http://binged.it/ukmr5Y
Is it the M2Tech hiface? I think that has its own drivers instead of UAC and I think they no longer supply the modules. Is that right?
  Reply With Quote
Old 28th November 2011, 06:53 PM   #934
Turbon is offline Turbon  Sweden
diyAudio Member
 
Turbon's Avatar
 
Join Date: Aug 2011
Location: South
M2Tech Hiface - "Internal very low jitter oscillators and proprietary drivers allow for playing 192kHz/24bits audio files that feature the best signal quality."

M2Tech Hiface EVO - "Asynchronous operation up to 192kHz is used in conjunction with proprietary drivers which allow for Kernel Streaming, Direct Sound and WASAPI operation (the latter under Windows vista and 7)."
__________________
These are my principles, and if you don't like them... well, I have others.
  Reply With Quote
Old 29th November 2011, 12:48 AM   #935
qusp is offline qusp  Australia
diyAudio Member
 
qusp's Avatar
 
Join Date: Oct 2009
Location: Brisbane, Australia
Turbon is correct, its an OEM module based on tyhe same chipset and basic design as the Hiface. A while back a GB on here for it was stopped in its tracks because the datasheet was made public and they were made aware of it, so they never supplied it to the general public. i went ahead bought them legit as an industry professional, but i think you would struggle to get them to come to the party with licensing and the lack of a UAC2 driver is probably another deal breaker for you. it does expose all the power supplies, i2c and control pins as well as i2s.

so because i have them already the 98 dollar ES9023 dac deal is a screaming winner for this dac/amp i'm making for my friend.
  Reply With Quote
Old 29th November 2011, 01:03 AM   #936
diyAudio Member
 
Join Date: Nov 2011
Location: http://binged.it/ukmr5Y
ES9023? Interesting. I'd love an ES9012 DAC running UAC2 (& UAC1) feeding an ODA or "The Wire" tuned specifically for my AKG's power range.
  Reply With Quote
Old 29th November 2011, 01:21 AM   #937
qusp is offline qusp  Australia
diyAudio Member
 
qusp's Avatar
 
Join Date: Oct 2009
Location: Brisbane, Australia
Quote:
Originally Posted by ethanolson View Post
ES9023? Interesting. I'd love an ES9012 DAC running UAC2 (& UAC1) feeding an ODA or "The Wire" tuned specifically for my AKG's power range.
yes es9023 for my mate; me i'm running UAC2->multichannel i2s-> AKD12 into NTD1 IV (with the bal-SE wire and soon bal-bal wire) but i'm also running a second akd12 and these 4 channels with 4 matching power amps using a digital crossover power my soon to be finished 2 way speakers

no need for tuning for AKG, unity gain is perfect for ~60ohms but that assumes you are running regular AKG. i cant remember if you had 240's or k1000 or something nuts =)

kids run away before the DIY bug gets you!!

Last edited by qusp; 29th November 2011 at 01:24 AM.
  Reply With Quote
Old 29th November 2011, 03:33 AM   #938
diyAudio Member
 
Join Date: Nov 2011
Location: http://binged.it/ukmr5Y
Wow... your setup is pretty much my persuit. Anyway, I'm rolling with the K 171 Mk II headphones, so unity is probably fine because a gain of ~1.6 would be my max from 2V feed and I would want to use more than the first 1/3 of the volume pot.

It's amazing how much better they sound amped... and I'm a quiet listener.

Last edited by ethanolson; 29th November 2011 at 03:38 AM. Reason: Omitted first line by accident
  Reply With Quote
Old 29th November 2011, 03:55 AM   #939
diyAudio Member
 
Join Date: Nov 2011
Location: http://binged.it/ukmr5Y
@qusp,

Why does everyone have I/V stages for their ESS DACs? Don't they have a voltage output option? TPA does it. AckoDAC does it. And others, as well. Does current mode sound better even with the I/V circuit?
  Reply With Quote
Old 29th November 2011, 04:24 AM   #940
diyAudio Member
 
RocketScientist's Avatar
 
Join Date: Mar 2008
Location: Northwest
@ethanolson, the short answer to that question is most DIYers design "blind" without proper test equipment and using only heavily biased sighted listening as their guide. They very often think they hear things that don't really exist as has been demonstrated countless times in blind listening tests. if you throw a bed sheet over the equipment, without changing anything else, the benefits they think they hear magically disappear. So it's easy to see how they think adding an op amp stage to a DAC chip improves the sound when in reality it might make the performance a bit worse.
__________________
http://nwavguy.com - Personal non-commercial audio blog
  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
Headphone amp project grahamfocal Headphone Systems 7 21st June 2011 05:28 PM
My latest project - DAC + headphone amp gmarsh Digital Line Level 105 13th December 2010 02:31 PM
My headphone amp project trifidmaster Headphone Systems 2 22nd December 2008 03:52 PM
Mini Ipod headphone amp DIY project Nordic Headphone Systems 14 11th March 2007 02:35 PM
Need help for a battery headphone amp project dismalonyx Headphone Systems 1 15th April 2004 11:22 PM


New To Site? Need Help?

All times are GMT. The time now is 09:53 AM.


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