ICE/ class d amps used for PA/musical instruments? - Page 5

phase_accurate · 19th May 2004, 06:17 AM

This is not exactly a myth. One of the main reasons for using a class-d amp is still efficiency. But I agree that class-d amps definitely profit from generously dimensioned PSU and heat-sinking.

Regards

Charles

desert rat · 28th May 2004, 08:18 AM

Is this what you guys are talking about? A buddy says that the place where he works uses these. He sent me the attached picture. He says that they work very well, but I'm a tube guy and I know nothing about them.

Nisbeth · 28th May 2004, 08:08 PM

I don't see any attachment/picture

/U.

Sheriff · 28th May 2004, 09:36 PM

Yes i believe that this is an B&o Icepower ASP series - with an SMPS integrated with the class d amp - as used by Jeff Rowland (i believe) in their model 201 power amplifier.

Cheers

Sheriff

TNT · 28th May 2004, 09:53 PM

Mr Rowland uses output transformers etc. which makes these amplifiers quite different what has yet been built using ice-power. Does JR really use SMPS ?

/

Sheriff · 29th May 2004, 08:14 AM

Yes he uses SMPS, and did in his model 10 and 12 also.

Mr Rowland may use transformers in the input / output stage of his preamps etc, but the 201 is made (certainly in part) by the ASP series from ICEpower AS in Denmark.

I am sure that the input stage will have refinements, and he would have ensured that his additional circuitry adds to the mix to ensure good performance from his amplifier.

Cheers

Sheriff

km · 26th November 2004, 08:37 PM

hi.

>Does B&O/ICE sell those modules directly yo the end user? Anyone know where to buy them in the scandinavia?>

perhaps a bit late but i can point you to a source for these

best rgds - karsten madsen - www.cadaudio.dk

janaf · 26th November 2004, 09:20 PM

I B&O asked about two years ago and got the reply "no".

I have since then made my own boards for the Tripath TA2022 chip (2x100W) and hope to have boards for the TK2350 (2x300W or more) ready in a few weeks. Located in Scandinavia....

See http://www.41hz.com

DukeNude · 3rd March 2005, 04:52 PM

Quote:

Originally posted by km
hi.

>Does B&O/ICE sell those modules directly yo the end user? Anyone know where to buy them in the scandinavia?>

perhaps a bit late but i can point you to a source for these

best rgds - karsten madsen - www.cadaudio.dk

well, you can't order them as a private person, but, if you know somebody who builds audio product, there's no problem!

I just opened the Jeff Rowland Concerto Amp... there is really an Icepower 500 ASP in the case; at the inputs they added a Lundahl transformer, that's all

the same is in the 201 without preamp
I took a lot of pics, maybe I'll build some amps to fully activate my systems for 10 % of the price of 6 Rowlands

janaf · 4th March 2005, 12:18 PM

Hi,

By now I make my own boards and also sell them as kits.
I have three models based on Tripath chipsets in the 2x25W, 2x100W and 2x300W range and more are coming.

Please see http://www.41hz.com

28th May 2004, 09:36 PM	#44
Sheriff diyAudio Member Join Date: Feb 2003 Location: England	ICEpower picture Yes i believe that this is an B&o Icepower ASP series - with an SMPS integrated with the class d amp - as used by Jeff Rowland (i believe) in their model 201 power amplifier. Cheers Sheriff

29th May 2004, 08:14 AM	#46
Sheriff diyAudio Member Join Date: Feb 2003 Location: England	Mr Rowland Yes he uses SMPS, and did in his model 10 and 12 also. Mr Rowland may use transformers in the input / output stage of his preamps etc, but the 201 is made (certainly in part) by the ASP series from ICEpower AS in Denmark. I am sure that the input stage will have refinements, and he would have ensured that his additional circuitry adds to the mix to ensure good performance from his amplifier. Cheers Sheriff

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19th May 2004, 06:17 AM	#41
phase_accurate diyAudio Member Join Date: May 2002 Location: Switzerland	This is not exactly a myth. One of the main reasons for using a class-d amp is still efficiency. But I agree that class-d amps definitely profit from generously dimensioned PSU and heat-sinking. Regards Charles

28th May 2004, 08:08 PM	#43
Nisbeth diyAudio Member Join Date: Jan 2001 Location: Denmark	I don't see any attachment/picture /U.

28th May 2004, 09:53 PM	#45
TNT diyAudio Member Join Date: Apr 2003 Location: Sweden	Mr Rowland uses output transformers etc. which makes these amplifiers quite different what has yet been built using ice-power. Does JR really use SMPS ? /

26th November 2004, 08:37 PM	#47
km diyAudio Member Join Date: May 2001 Location: dk	hi. >Does B&O/ICE sell those modules directly yo the end user? Anyone know where to buy them in the scandinavia?> perhaps a bit late but i can point you to a source for these best rgds - karsten madsen - www.cadaudio.dk

26th November 2004, 09:20 PM	#48
janaf diyAudio Member Join Date: Apr 2004 Location: Stockholm	I B&O asked about two years ago and got the reply "no". I have since then made my own boards for the Tripath TA2022 chip (2x100W) and hope to have boards for the TK2350 (2x300W or more) ready in a few weeks. Located in Scandinavia.... See http://www.41hz.com

4th March 2005, 12:18 PM	#50
janaf diyAudio Member Join Date: Apr 2004 Location: Stockholm	Hi, By now I make my own boards and also sell them as kits. I have three models based on Tripath chipsets in the 2x25W, 2x100W and 2x300W range and more are coming. Please see http://www.41hz.com

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