N.E.W A-60 Class A heatsink

vsr123 · 17th May 2004, 10:28 PM

Hi Folks
I know this has been a sore subject in the past but I could not find the following information for this amp -

Does anyone know how many watts of heat this chassis is capable of dissipating? I could not find any measurements/size of the heatsink. Based on the wattage (60W/channel) I am assuming that it could do at least 100 W of heat with a 30C rise, hence effectively giving a .3C/W heatsink capability but I also heard that this amp ran very hot...does anyone know?

thanks
vsr

Michael Rothacher · 17th May 2004, 11:37 PM

Your estimates are very good.

I gutted an A60 (Nelson would be proud!) for my Penultimate Zen. I'm running the channels at 100W each and they run around 55 degrees C.

I bought several chassis when they went tits-up. Paid a tidy sum, but they're perfect for many of the Pass projects and I like the element of revenge / irony.

vsr123 · 18th May 2004, 12:41 AM

great! that means I should be able to run an Aleph 3 without any problems!

Nelson Pass · 18th May 2004, 09:04 PM

The NEW heat sink will be very hot at 100 watts dissipation.
I have used its equivalent for 20 watt Zens, drawing about
50 watts per channel, and that was an acceptable temperature.

Michael Rothacher · 18th May 2004, 10:22 PM

With due respect, to the Zen master...

Is it possible you are thinking of the smaller N.E.W heatsinks? I'm using the A60 sinks dissapating around 95-100 watts at 55 degrees C.

Oh, I forgot to mention the ambient in my listening room is 10 degrees C. Just kidding....

Thanks, sir.

Michael Rothacher · 19th May 2004, 02:38 AM

VSR123:

Hears my ZV4 in the A60 chassis. Oriented horizontally to show the insides - digital thermometer attached to heatsink. The "Kil-A-Watt" meter (behind) reads 230 Watts power drawn from the wall.

Michael Rothacher · 19th May 2004, 02:41 AM

Here's another view:

vsr123 · 19th May 2004, 06:24 PM

I have decided to go with a bigger heatsink chassis as I want to be able to upgrade it to an Aleph 5 or Aleph-x monoblock in time

thanks for all your help

vsr123 · 19th May 2004, 06:25 PM

.

Nelson Pass · 19th May 2004, 07:31 PM

My daughter runs one just like it, but with a selector switch
and volume control.

17th May 2004, 10:28 PM	#1
vsr123 diyAudio Member Join Date: Mar 2003 Location: california	N.E.W A-60 Class A heatsink Hi Folks I know this has been a sore subject in the past but I could not find the following information for this amp - Does anyone know how many watts of heat this chassis is capable of dissipating? I could not find any measurements/size of the heatsink. Based on the wattage (60W/channel) I am assuming that it could do at least 100 W of heat with a 30C rise, hence effectively giving a .3C/W heatsink capability but I also heard that this amp ran very hot...does anyone know? thanks vsr

18th May 2004, 12:41 AM	#3
vsr123 diyAudio Member Join Date: Mar 2003 Location: california	many thanks great! that means I should be able to run an Aleph 3 without any problems!

19th May 2004, 06:24 PM	#8
vsr123 diyAudio Member Join Date: Mar 2003 Location: california	thanks much I have decided to go with a bigger heatsink chassis as I want to be able to upgrade it to an Aleph 5 or Aleph-x monoblock in time thanks for all your help

19th May 2004, 06:25 PM	#9
vsr123 diyAudio Member Join Date: Mar 2003 Location: california	Very neatly done, nice wiring work .

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17th May 2004, 11:37 PM	#2
Michael Rothacher www.audiohobby.com diyAudio Member Join Date: May 2001 Blog Entries: 3	Your estimates are very good. I gutted an A60 (Nelson would be proud!) for my Penultimate Zen. I'm running the channels at 100W each and they run around 55 degrees C. I bought several chassis when they went tits-up. Paid a tidy sum, but they're perfect for many of the Pass projects and I like the element of revenge / irony.

18th May 2004, 09:04 PM	#4
Nelson Pass The one and only Join Date: Mar 2001	The NEW heat sink will be very hot at 100 watts dissipation. I have used its equivalent for 20 watt Zens, drawing about 50 watts per channel, and that was an acceptable temperature.

18th May 2004, 10:22 PM	#5
Michael Rothacher www.audiohobby.com diyAudio Member Join Date: May 2001 Blog Entries: 3	With due respect, to the Zen master... Is it possible you are thinking of the smaller N.E.W heatsinks? I'm using the A60 sinks dissapating around 95-100 watts at 55 degrees C. Oh, I forgot to mention the ambient in my listening room is 10 degrees C. Just kidding.... Thanks, sir.

19th May 2004, 07:31 PM	#10
Nelson Pass The one and only Join Date: Mar 2001	My daughter runs one just like it, but with a selector switch and volume control.

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