class A amp wanted

paul.42 · 17th July 2007, 10:13 PM

wanted class A amp upto 200watts per channel into 8ohms w.h.y.you can email me details of anything of interest to
paul39ish@fsmail.net

paul.42 · 20th July 2007, 11:51 AM

still looking

paul.42 · 22nd July 2007, 06:42 AM

now sorted thanks for the replies

Dxvideo · 24th July 2007, 08:17 AM

I think you cannot have any answer. Because I am working on a 20W Class A project (just 20W) and I cannot handle even its thermal problems. It needs 0.2 C/W heatsink.
I cannot imagine how much heatsink does a 200W Class A need...

WALTER BURKHARD · 24th July 2007, 08:51 AM

on ebay price itÂ´s to high...

http://cgi.ebay.de/Krell-KSA-100-End...QQcmdZViewItem

He sayÂ´s weght will be 70kg

Dxvideo · 24th July 2007, 08:57 AM

And its just 2 x 50W as I know... Not 200W!

AndrewT · 24th July 2007, 09:09 AM

How much power does the KSA160 put out in ClassA?
It might be getting close.

But seriously, 200W of pushpull ClassA is some target you've set yourself.
Single ended would be even worse for heat dissipation.

The 100W of ClassA from the KSA100 dissipates about 270W per channel and probably runs at about 600 to 700W when ticking over.

A 200W amp will probably be double this. Yes, about 1400W of quiescent consumption and the same heating power pushed into the listening room.

jacco vermeulen · 24th July 2007, 09:12 AM

An Englander who desires that much heat should try to locate a duo of Musical Fidelity A570 dinos.

AndrewT · 24th July 2007, 09:28 AM

But what value of ClassA current can the MF570 put out?

MF usually went for high bias ClassAB in their more expensive amplifiers.

jacco vermeulen · 24th July 2007, 09:38 AM

The monoblock A570 can be configured to run in full Class A.
A duo weighs in at around 450lbs though.

17th July 2007, 10:13 PM	#1
paul.42 diyAudio Member Join Date: Jul 2007	class A amp wanted wanted class A amp upto 200watts per channel into 8ohms w.h.y.you can email me details of anything of interest to paul39ish@fsmail.net

24th July 2007, 08:17 AM	#4
Dxvideo diyAudio Member Join Date: Nov 2003 Location: Turkey	I think you cannot have any answer. Because I am working on a 20W Class A project (just 20W) and I cannot handle even its thermal problems. It needs 0.2 C/W heatsink. I cannot imagine how much heatsink does a 200W Class A need... __________________ Best regards, Ozgur

24th July 2007, 08:51 AM	#5
WALTER BURKHARD diyAudio Member Join Date: Dec 2002 Location: Helsinki	KRELL KSA100 on ebay price itÂ´s to high... http://cgi.ebay.de/Krell-KSA-100-End...QQcmdZViewItem He sayÂ´s weght will be 70kg

24th July 2007, 08:57 AM	#6
Dxvideo diyAudio Member Join Date: Nov 2003 Location: Turkey	And its just 2 x 50W as I know... Not 200W! __________________ Best regards, Ozgur

24th July 2007, 09:09 AM	#7
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	How much power does the KSA160 put out in ClassA? It might be getting close. But seriously, 200W of pushpull ClassA is some target you've set yourself. Single ended would be even worse for heat dissipation. The 100W of ClassA from the KSA100 dissipates about 270W per channel and probably runs at about 600 to 700W when ticking over. A 200W amp will probably be double this. Yes, about 1400W of quiescent consumption and the same heating power pushed into the listening room. __________________ regards Andrew T.


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20th July 2007, 11:51 AM	#2
paul.42 diyAudio Member Join Date: Jul 2007	still looking

22nd July 2007, 06:42 AM	#3
paul.42 diyAudio Member Join Date: Jul 2007	now sorted thanks for the replies

24th July 2007, 09:12 AM	#8
jacco vermeulen diyAudio Member Join Date: Oct 2004 Location: At the sea front, just under Rotterdam	An Englander who desires that much heat should try to locate a duo of Musical Fidelity A570 dinos. __________________ Looks like Sponge Bob has killed another thread.

24th July 2007, 09:28 AM	#9
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	But what value of ClassA current can the MF570 put out? MF usually went for high bias ClassAB in their more expensive amplifiers. __________________ regards Andrew T.

24th July 2007, 09:38 AM	#10
jacco vermeulen diyAudio Member Join Date: Oct 2004 Location: At the sea front, just under Rotterdam	The monoblock A570 can be configured to run in full Class A. A duo weighs in at around 450lbs though. __________________ Looks like Sponge Bob has killed another thread.

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