How many capacitors do you need? - diyAudio
Go Back   Home > Forums > Amplifiers > Class D

Class D Switching Power Amplifiers and Power D/A conversion

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 February 2010, 07:01 PM   #1
Markgm is offline Markgm  United States
diyAudio Member
 
Join Date: Jan 2010
Location: VT, USA
Default How many capacitors do you need?

NuForce review page at 6moons (with pic on page).

Click the image to open in full size.

Since I am new at this, I am wondering what all these capacitors are doing for the sound of this integrated?

Cheers -
Mark
  Reply With Quote
Old 28th February 2010, 07:29 PM   #2
diyAudio Member
 
event horizon's Avatar
 
Join Date: Feb 2008
Location: East Midlands, England
Quote:
Originally Posted by Markgm View Post
Since I am new at this, I am wondering what all these capacitors are doing for the sound of this integrated?

Cheers -
Mark
It's probably more to do with fitting a certain amount of storage capacitance into a certain volume more than anything. If not that it's to seriously increase the ripple current capacity of the supply - which i can see is switchmode. Looking at that chassis it's not that big at all I have capacitors here that wouldn't fit inside that chassis (from what i can see) unless i crushed them

Also, SMPS (switchmode power supplys) tend to use much more modern caps that still have a low ESR (equivalent series resistance) & ESL (equivalent series inductance) & tend to be a lot smaller than stuff used at 100 or 120Hz which is the rectified frequency of normal mains depending on location & rectifier type.

In simplistic terms it gives the amplifier a massive power supply which will certainly aid the production of quality audio. Power supply is expensive so when you see a hefty one you know the designer is going for quality (if they know what they are doing) rather than something mediocre.

A small car engine can't respond as fast as a Ferrari engine, you want perfomance then make the engine more powerful (PSU).
__________________
"Never let your morals prevent you from doing what is right!" Salvor Hardin
  Reply With Quote
Old 1st March 2010, 12:30 PM   #3
Markgm is offline Markgm  United States
diyAudio Member
 
Join Date: Jan 2010
Location: VT, USA
Ok, so if this person is using these caps to filter out ripple from their PS, I am wondering if anyone has experimented with how many caps you can put after the bridge that will continue to improve the quality of the power?

Since I'm getting ready to try PSs for an amp (for my first time), I was curious as to what extent adding caps in series to an SMPS could improve it.

Lot's of storage, but they don't look expensive.

Cheers -
Mark
  Reply With Quote
Old 1st March 2010, 02:03 PM   #4
diyAudio Member
 
theAnonymous1's Avatar
 
Join Date: Feb 2004
Location: Anonymityville
That's not a lot of caps.

How about 160x 820uF 63v Panasonic FC (32,800uF per rail).

Click the image to open in full size.
  Reply With Quote
Old 1st March 2010, 03:37 PM   #5
msb64 is offline msb64  Canada
diyAudio Member
 
Join Date: Feb 2008
I would hate to have to swap those out later on
  Reply With Quote
Old 1st March 2010, 09:59 PM   #6
Markgm is offline Markgm  United States
diyAudio Member
 
Join Date: Jan 2010
Location: VT, USA
Quote:
Originally Posted by theAnonymous1 View Post
That's not a lot of caps.

How about 160x 820uF 63v Panasonic FC (32,800uF per rail).
That's confirming! And I'll have to start a collection of capacitors for my new power supplies.

Cheers -
Mark
  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
what is the difference between silver mica capacitors and ceramic capacitors ?? prorms Solid State 1 6th May 2008 12:38 PM
Continental Capacitors' "Type-A" oil-filled capacitors? radical Parts 0 21st October 2004 08:39 PM
Can I use these capacitors? ble0t Parts 2 23rd May 2004 04:08 PM
capacitors: panasonic FC vs elna RJH vs rubycon ZA capacitors costiss Parts 11 30th January 2003 09:32 PM
differences between computer grade capacitors and small can capacitors LBHajdu Pass Labs 0 22nd February 2002 01:29 AM


New To Site? Need Help?

All times are GMT. The time now is 04:35 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