Looking to hire someone to help with simple headphone amplifier design - diyAudio
Go Back   Home > Forums > Amplifiers > Chip Amps
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Chip Amps Amplifiers based on integrated circuits

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
Thread Tools Search this Thread
Old 17th May 2011, 04:52 PM   #1
diyAudio Member
Join Date: May 2011
Default Looking to hire someone to help with simple headphone amplifier design

Hi All;

I have a few small projects in mind that are over my head. I'm trying to find someone that would be willing to help me finish and draft the idea out so I can have it produced!

In short, I want to recreate the headphone amplifier stages from various older portable cd/cassette/dat players (nak 550, sony d8, sony dd9) in modular amplifier form for the Hifiman 801. It would entail taking the amp stage from the schematic, adjusting the power input (the power from the Hifiman is 5V and 7.4V, most of these portable units require much lower voltage), and plotting these in a program which I can then submit for production (I was thinking aapcb.com but am open to any suggestions!).

It's pretty straightforward, but I'm more interested in the final project than the trial and error of where I go wrong in the design, or trying to get Eagle working right for the required files.

If anyone would be willing to help with this, I would happily compensate for your time. Just drop me a PM and we'll go from there. I'd happily provide more info here if there's any interest.


  Reply With Quote
Old 17th May 2011, 07:02 PM   #2
diyAudio Member
Join Date: Feb 2011
copy the chematic from the exsisting board, and use a simple LDO to get the required voltage for them from the modular amp.
  Reply With Quote
Old 17th May 2011, 07:15 PM   #3
diyAudio Member
Join Date: May 2011
Thanks Arty; the issue is that the board this has to fit on is very specific; I'd need to have it laid out nicely on there; I'm also concerned there'd be some things I'm missing. To someone that has some experience in simple construction these are no big deal; but to me, I'd likely bungle a good amount of it up!
  Reply With Quote
Old 17th May 2011, 07:42 PM   #4
qusp is offline qusp  Australia
diyAudio Member
qusp's Avatar
Join Date: Oct 2009
Location: Brisbane, Australia
are you sure it was the amplifier design that made these headphone outputs sound so good? most will have used fairly old, standard low voltage opamps
  Reply With Quote
Old 17th May 2011, 07:45 PM   #5
diyAudio Member
Join Date: May 2011
qusp, you're correct. We can use "good" as a relative term, but yes, opamps played a large part (for analog sources) and i'm sure the early 90's tech D/A converters played a large part as well; there's people on both sides for the SQ of those, but one thing we can agree on is that they're "unique."

There's definitely a lot more that contributed to the sound signature of the units; this is, like most projects, just an exercise and an experiment!
  Reply With Quote


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
Looking to hire someone to help with IC amp design! FasterHorses Chip Amps 1 21st May 2011 05:32 PM
Simple Headphone Distribution Amplifier TheSeekerr Headphone Systems 7 28th November 2010 11:08 AM
This happens when you hire a good designer. Cassiel Tubes / Valves 129 25th November 2009 03:12 AM
A simple Headphone amplifier. Kapibara Headphone Systems 3 20th July 2007 08:55 AM
My DIY headphone amplifier design cetoole Headphone Systems 26 9th December 2005 01:39 PM

New To Site? Need Help?

All times are GMT. The time now is 10:10 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2