Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

need comments on amp design
need comments on amp design
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 10th September 2006, 08:03 PM   #1
metebalci is offline metebalci  Turkey
diyAudio Member
Join Date: Feb 2004
Location: Istanbul/TURKEY
Default need comments on amp design

I have recently built a millett hybrid headphone amp, and that has caused me to think about how to design an amp.

I have an AKG K501. It is 120ohm with rated max input power 200mW.

To design an amp for it:

1) To drive it, I need something like 5V/40mA

2) I need;
a) preamp stage (maybe simply a volume pot)
b) voltage amp stage (since cd output is 2V, with gain like 2.5 = 5/2)
c) power amp or buffer stage if voltage amp cannot provide 40mA

3) I need impedance matching of output impedance to 120ohm, if it is quite different. We need as close as possible to transfer maximum power, right ?

I am a bit lost with the gain calculations when keeping impedance matching in my mind.

In millett's hybrid, we have an output buffer with 250mA current output but something like 3V voltage output. How can such a thing drive something (120ohm) needing 5V ? Do I read spec of buffer or headphone wrong ?

If possible, you can tell me about circuit theory terms, I am familiar with it.

Thanks in advance.
  Reply With Quote


need comments on amp designHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Any comments on this design? icebear Tubes / Valves 23 19th May 2009 04:07 PM
Need comments on amp design mightydub Solid State 28 24th December 2008 01:01 AM
My first amp design - comments blueskynis Solid State 36 26th March 2008 03:38 PM
comments on this design.. GeirW Tubes / Valves 6 13th February 2004 08:24 AM
Comments on this design? G Tubes / Valves 0 16th October 2003 05:09 PM

New To Site? Need Help?

All times are GMT. The time now is 12:19 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 16.67%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio