What makes the most sound improvement? - Page 2 - diyAudio
Go Back   Home > Forums > Amplifiers > Chip Amps

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
Reply
 
Thread Tools Search this Thread
Old 25th February 2004, 07:44 AM   #11
Banned
 
Join Date: Apr 2002
Location: Germany, Clausthal
Quote:
most sound improvement
The bottle of wine you drink at the evening you test your new diy amp after its finished for the first time with real music.
  Reply With Quote
Old 25th February 2004, 10:26 AM   #12
diyAudio Member
 
Join Date: Nov 2002
Location: UK
Default Suggestions

……but where to from there???

Steve,

Some suggestions based on my own experience.

General…
Replace the volume pot with an attenuator (shunt type).
Upgrade the electrolytics.

With reference to reducing harshness.
Cheap electroylics sound congested and harsh, use film types where possible, preferably Jensen paper-in-oil.

Buffer…
I have repeatedly tried the OPA627 (and many other OPA/AD op-amps) in two different circuits (in, and not in, class A). I have consistently formed a preference for the AD797, NE5534, NJM2114 and the LM6171 due to their more natural presentation of detail. For striking dynamics, excitement and thrills the OPA627 is perhaps a better choice, along with many other FET input op-amps, though to my sensitive ears most of the FET types sound hard and edgy to some degree. The AD6810 and the AD825 are exceptions. For tonal accuracy, smoothness and fine detail try the LM6171 in class A, though fit a 500nF film cap across its supply pins, though don’t expect much in the way of ambient warmth. For that try the NE5534 which improves on all of the above with respect to fine ambient detail, or the AD797. For many I am sure the NE fails to provide excitement and it certainly sounds less dynamic than most, but it somehow manages to extract all that is good in a recording whilst removing the rest. Or should that read ‘it doesn’t add anything of its own’. For best results perhaps you could omit the NE5534 compensation capacitor and configure the circuit for some gain. The NE5532, which has the compensation capacitor built-in, sounds less good in my circuit.

Tim.
  Reply With Quote
Old 25th February 2004, 11:29 PM   #13
diyAudio Member
 
BlackDog's Avatar
 
Join Date: Feb 2004
Location: Wellington, New Zealand
Default Re: Suggestions

Quote:
Originally posted by TimA
……but where to from there???


Replace the volume pot with an attenuator (shunt type).

You mean a stepped attenuator...or something else?

Quote:

Upgrade the electrolytics.
I'll be ordering some Panasonic FC's for the supply caps soon.

With reference to reducing harshness.
Cheap electroylics sound congested and harsh, use film types where possible, preferably Jensen paper-in-oil.

Quote:

Buffer…
For best results perhaps you could omit the NE5534 compensation capacitor and configure the circuit for some gain. The NE5532, which has the compensation capacitor built-in, sounds less good in my circuit.

Tim.
I quickly built a buffer onto breadboard last night, using an NE5534 and decided to follow the circuit Nuuk has on his website, without any unity gain compensation. It worked (ie I got sound) , but I haven't had a chance to listen to it properly yet. It'll have to wait 'till I get back from my hols to play with it more.

Steve
  Reply With Quote
Old 26th February 2004, 08:07 AM   #14
diyAudio Member
 
Join Date: Nov 2002
Location: UK
Steve,

Yes, I mean a stepped attenuator.

Tim.
  Reply With Quote
Old 26th February 2004, 08:29 AM   #15
Nuuk is offline Nuuk  United Kingdom
diyAudio Member
 
Nuuk's Avatar
 
Join Date: Feb 2003
Location: Somerset, SW England
Yes, he means a shunted stepped attenuator.

Read this Steve.
__________________
The truth need not be veiled, for it veils itself from the eyes of the ignorant.
  Reply With Quote
Old 26th February 2004, 01:52 PM   #16
matjans is offline matjans  Netherlands
diyAudio Member
 
matjans's Avatar
 
Join Date: Aug 2003
Location: Utrecht, NL
Send a message via MSN to matjans
apart from the volume control and electrolytics, using quality resistors (especially in the feedback loop) improves the sound too.

Try Caddock mk132's, if you can get'em. To me they sound very natural and detailed, the soundstage is much wider than with normal metal film resistors. Expensive though...
  Reply With Quote
Old 26th February 2004, 05:13 PM   #17
maylar is offline maylar  United States
diyAudio Member
 
Join Date: Jun 2003
Location: Connecticut
Riiiiight.

Better use pure silver wire too. Doesn't distort those electrons like copper does.

__________________
dave
  Reply With Quote
Old 27th February 2004, 10:38 AM   #18
matjans is offline matjans  Netherlands
diyAudio Member
 
matjans's Avatar
 
Join Date: Aug 2003
Location: Utrecht, NL
Send a message via MSN to matjans
... and all interlinks sound the same.

you could ofcourse *try* it...
  Reply With Quote
Old 27th February 2004, 11:47 AM   #19
matjans is offline matjans  Netherlands
diyAudio Member
 
matjans's Avatar
 
Join Date: Aug 2003
Location: Utrecht, NL
Send a message via MSN to matjans
hah i found the thread i was looking for: link

people talking about the sound of caps & resistors.
  Reply With Quote
Old 29th February 2004, 07:56 PM   #20
diyAudio Member
 
BlackDog's Avatar
 
Join Date: Feb 2004
Location: Wellington, New Zealand
Default Thanks!

Thanks for all the suggestions guys.....

Can't say much more as I am holiday, and this is just a brief trip to a net cafe...

Steve
  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
Color LED adjacent to CD lens,improvement in sound??? Leolabs Digital Source 1 9th July 2009 07:21 AM
Easy Tweak for Sound Improvement! lineup Everything Else 26 14th December 2008 04:05 PM
EMM LABS Dac sound improvement!!! raju Digital Source 1 2nd November 2008 02:34 PM
Sound Improvement! Tripmaster Chip Amps 27 1st July 2008 08:48 AM


New To Site? Need Help?

All times are GMT. The time now is 06:56 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