can't get my head around PSU's, help choosing. - diyAudio
Go Back   Home > Forums > Amplifiers > Power Supplies

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 24th January 2012, 11:20 AM   #1
diyAudio Member
 
Join Date: Jan 2012
Default can't get my head around PSU's, help choosing.

can someone tell me what size power supply i would need to run these from?

Product Number
AA-AB33182
Product Name
4*100 watt @ 4ohm, TK2050 D-class Audio Amplifier Board
for subwoofers.
10-32v input

Product Number
AA-AB32181
Product Name
2*100 watt @ 4ohm TK2050 Class-D Audio Amplifier Board
speakers.
10-30v input


would this work well?

eBay - The UK's Online Marketplace

thanks for your help.
  Reply With Quote
Old 24th January 2012, 12:04 PM   #2
diyAudio Member
 
runebivrin's Avatar
 
Join Date: Jul 2003
Location: Huddinge, Sweden
Send a message via MSN to runebivrin
Should work OK. But you won't be able to drive all those amps at full power with just one PSU; there's not enough current available. For normal use with music you shouldn't have a problem.
__________________
Do wizards use spell checkers?
  Reply With Quote
Old 24th January 2012, 12:11 PM   #3
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
yes, that PSU will power the amplifiers.
You may need to add some filtering between PSU and amp PCB.

Are you aware that these are not 100W amplifiers?
Each amp is more like a 30W to 35W specification when run on 30Vdc.
On 24Vdc they will be considerably less.
__________________
regards Andrew T.
  Reply With Quote
Old 24th January 2012, 12:21 PM   #4
diyAudio Member
 
Join Date: Jan 2012
Quote:
Originally Posted by runebivrin View Post
Should work OK. But you won't be able to drive all those amps at full power with just one PSU; there's not enough current available. For normal use with music you shouldn't have a problem.
i was planning on running each module from its own power supply, i'm just completely confused as to what i'm looking for. i read a link on making your own specifically and it messed my head up for hours of reading the same article over and over again.

Quote:
Originally Posted by AndrewT View Post
yes, that PSU will power the amplifiers.
You may need to add some filtering between PSU and amp PCB.

Are you aware that these are not 100W amplifiers?
Each amp is more like a 30W to 35W specification when run on 30Vdc.
On 24Vdc they will be considerably less.
care to expand? especially the filter part?

4 Channel 100W TK2050 D class Audio Amplifier Board Assembled | eBay

as far as i was aware these were internally bridged amp modules.

thanks for the replies.
  Reply With Quote
Old 24th January 2012, 12:28 PM   #5
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
Don't try to build an SMPS.
Either buy a ready made SMPS or build a linear PSU.

Yes, the chipamps can be bridged.
I have never used an SMPS to power a chipamp, I can't tell you what might need to be added. Just a forewarning.
__________________
regards Andrew T.
  Reply With Quote
Old 24th January 2012, 06:44 PM   #6
diyAudio Member
 
Join Date: Oct 2011
Location: Tauberbischofsheim, Germany
100 watts @ 4 ohms means a voltage swing of 56.6 Vpp. Even in bridged mode you can't expect this voltage swing from only 24 Vdc, no matter if, or how you expand filtering. You will need a DC supply of at least 33-35 V for bridge mode, or 65-70 V for a single power output stage.

Best regards!
  Reply With Quote
Old 25th January 2012, 09:11 AM   #7
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
But, they are not 100W amplifiers.
The specification shows 30W @ sensible distortion.

The higher powers are shoving out squared off sinewaves.
__________________
regards Andrew T.
  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
Head to head comparison of Manger and Lowther in Acousta and Front horns David Pinnegar Full Range 3 12th January 2011 01:59 AM
motor types head to head for a TT p_ete2003 Analogue Source 20 11th January 2007 09:29 PM
PSU's for CDM PRO2 simon dart Digital Source 7 29th November 2005 06:12 PM
psu's odysseybmx414 Chip Amps 16 26th November 2005 08:13 AM


New To Site? Need Help?

All times are GMT. The time now is 03:11 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