SMPS for AMP32-PS

space-cake · 22nd November 2006, 08:28 AM

hey,

i have an AMP32-PS on the way and i was thinking to look for a power supply while i wait for it as shipping to israel could take around two weeks. i read that people like SMPS for class-D amps and i guess if it's good for most people it will do just fine powering the AMP32-PS which i'm building for a friend to power the speakers that connect to his PC.

I admit not knowing too much about SMPS past the basic operating functions, so is there anything special I should look for other than the right ratings? any makers or specific models that are better for some reason? and do i have to use any other regulation or filtering or hooking them up to the amp is good enough?

Fin · 22nd November 2006, 11:12 AM

1. If you are happy to dabble inside his PC - you could its 12V supply.

2. If you want something separate and external - you can use something like a laptop supply. You can get a universal one that lets you select the voltage output and could be handy for other uses too. Some laptop supplies like Toshiba and Sony are set at 15V and 19V respectively. You could then add extra regulation to bring this down to the required level.

3. You could get an uncased/open SMPS like the one NUUK sells - and build it into the case with the amp.

space-cake · 22nd November 2006, 11:49 AM

can you please post a link to NUUK? thanks.

space-cake · 22nd November 2006, 12:53 PM

found it, they also sell on ebay... not very cheap though. what about using them cheap notebook power supplies? i was thinking about getting one with a 12V output or one with 15V and simply use a regulator. would that work fine without any additional filtering?

theAnonymous1 · 22nd November 2006, 01:10 PM

There are countless supplies on ebay that will work. I've had good results with the SMPS LCD monitor type.

Here are just a few that will work. These are all 14v regulated.

http://cgi.ebay.com/AC-Adapter-for-D...QQcmdZViewItem
http://cgi.ebay.com/New-Compaq-AC-Ad...QQcmdZViewItem
http://cgi.ebay.com/DELL-1701FP-1702...QQcmdZViewItem
http://cgi.ebay.com/14V-AC-power-ada...QQcmdZViewItem
http://cgi.ebay.com/Dell-Monitor-Pow...QQcmdZViewItem

space-cake · 22nd November 2006, 01:58 PM

thanks for the links... i just picked up the first one. do you the LCD type is better because of improved power factor correction? as far as i know "simple" SMPS suffer this problem much more than conventional power supplies.

Fin · 22nd November 2006, 09:41 PM

Quote:

Originally posted by theAnonymous1
There are countless supplies on ebay that will work. I've had good results with the SMPS LCD monitor type.

Here are just a few that will work. These are all 14v regulated.

http://cgi.ebay.com/AC-Adapter-for-D...QQcmdZViewItem
http://cgi.ebay.com/New-Compaq-AC-Ad...QQcmdZViewItem
http://cgi.ebay.com/DELL-1701FP-1702...QQcmdZViewItem
http://cgi.ebay.com/14V-AC-power-ada...QQcmdZViewItem
http://cgi.ebay.com/Dell-Monitor-Pow...QQcmdZViewItem

Hey Anonymous1

None of these SMPS represent the value of the one that you hate me informing other DIYers about!!!!!!!!!!!!!!
Hope you are not getting commission on any of these "expensive" ones.....:-)

theAnonymous1 · 23rd November 2006, 07:36 AM

Quote:

Hey Anonymous1

None of these SMPS represent the value of the one that you hate me informing other DIYers about!!!!!!!!!!!!!!
Hope you are not getting commission on any of these "expensive" ones.....:-)

If we were both working off commission it would just mean I'm making more.

As e-Shakespeare would say..... "To sayeth once is to inform, to sayeth twice is to spam".

Not to mention I have about 8 of the supplies from the last link. They work very well and are already in a nice plastic case with an IEC socket. Pay more get more.

space-cake · 23rd November 2006, 07:53 AM

so what about additional filtering and the power factor correction for supplies that are ment for LCD monitrs?

Fin · 23rd November 2006, 07:58 AM

I actually have a couple that are just like those suggested by Anonymous1....but a bit more powerfull and with selectable output voltages (3V to 15V).

I have to agree to agree that they are very handy and neat - especially if your amp is already in a case. However - if you still have to build the amp and get a nice case for it - you might as well put an uncased SMPS in there too. That way you don't waste money on the "nice plastic case with an IEC socket". The additional $20 or so could then be spent on getting a nicer case for the amp - which is the part that will be seen - and not hidden away somewhere.

Also - having the supply and regulation closer to the amp (ie. in the same case) would have to be better than it travelling through a meter or two of unshielded cable before it reaches the protection of the metal case.

Pay less - get more.......that's my philosophy...and the reason for DIY.

22nd November 2006, 08:28 AM	#1
space-cake diyAudio Member Join Date: Apr 2006 Location: home	SMPS for AMP32-PS hey, i have an AMP32-PS on the way and i was thinking to look for a power supply while i wait for it as shipping to israel could take around two weeks. i read that people like SMPS for class-D amps and i guess if it's good for most people it will do just fine powering the AMP32-PS which i'm building for a friend to power the speakers that connect to his PC. I admit not knowing too much about SMPS past the basic operating functions, so is there anything special I should look for other than the right ratings? any makers or specific models that are better for some reason? and do i have to use any other regulation or filtering or hooking them up to the amp is good enough?

22nd November 2006, 11:12 AM	#2
Fin diyAudio Member Join Date: Dec 2003 Location: -	1. If you are happy to dabble inside his PC - you could its 12V supply. 2. If you want something separate and external - you can use something like a laptop supply. You can get a universal one that lets you select the voltage output and could be handy for other uses too. Some laptop supplies like Toshiba and Sony are set at 15V and 19V respectively. You could then add extra regulation to bring this down to the required level. 3. You could get an uncased/open SMPS like the one NUUK sells - and build it into the case with the amp. __________________ Regards Fin

23rd November 2006, 07:58 AM	#10
Fin diyAudio Member Join Date: Dec 2003 Location: -	I actually have a couple that are just like those suggested by Anonymous1....but a bit more powerfull and with selectable output voltages (3V to 15V). I have to agree to agree that they are very handy and neat - especially if your amp is already in a case. However - if you still have to build the amp and get a nice case for it - you might as well put an uncased SMPS in there too. That way you don't waste money on the "nice plastic case with an IEC socket". The additional $20 or so could then be spent on getting a nicer case for the amp - which is the part that will be seen - and not hidden away somewhere. Also - having the supply and regulation closer to the amp (ie. in the same case) would have to be better than it travelling through a meter or two of unshielded cable before it reaches the protection of the metal case. Pay less - get more.......that's my philosophy...and the reason for DIY. __________________ Regards Fin

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22nd November 2006, 11:49 AM	#3
space-cake diyAudio Member Join Date: Apr 2006 Location: home	can you please post a link to NUUK? thanks.

22nd November 2006, 12:53 PM	#4
space-cake diyAudio Member Join Date: Apr 2006 Location: home	found it, they also sell on ebay... not very cheap though. what about using them cheap notebook power supplies? i was thinking about getting one with a 12V output or one with 15V and simply use a regulator. would that work fine without any additional filtering?

22nd November 2006, 01:10 PM	#5
theAnonymous1 diyAudio Member Join Date: Feb 2004 Location: Anonymityville	There are countless supplies on ebay that will work. I've had good results with the SMPS LCD monitor type. Here are just a few that will work. These are all 14v regulated. http://cgi.ebay.com/AC-Adapter-for-D...QQcmdZViewItem http://cgi.ebay.com/New-Compaq-AC-Ad...QQcmdZViewItem http://cgi.ebay.com/DELL-1701FP-1702...QQcmdZViewItem http://cgi.ebay.com/14V-AC-power-ada...QQcmdZViewItem http://cgi.ebay.com/Dell-Monitor-Pow...QQcmdZViewItem

22nd November 2006, 01:58 PM	#6
space-cake diyAudio Member Join Date: Apr 2006 Location: home	thanks for the links... i just picked up the first one. do you the LCD type is better because of improved power factor correction? as far as i know "simple" SMPS suffer this problem much more than conventional power supplies.

23rd November 2006, 07:53 AM	#9
space-cake diyAudio Member Join Date: Apr 2006 Location: home	so what about additional filtering and the power factor correction for supplies that are ment for LCD monitrs?

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