how to bias Halton Precision amps in to class A

rhythmdiy · 11th December 2008, 06:30 PM

Is there any method to bias the aussie amplifiers in class A... I think I can go with the http://www.aussieamplifiers.com/nxv500.htm module to get a generous 150watts RMS into class A mode but is there any mod to bias in class A... but sonically does it makes such difference?

rhythmdiy · 12th December 2008, 07:18 AM

please help me...

AndrewT · 12th December 2008, 09:46 AM

4pair of To264 cannot do 150W of ClassA.
It would need loaded supply rails of ~+-60Vdc and a bias current of about 3.1A. Total output dissipation ~370W, i.e. 46W/FET.

lineup · 12th December 2008, 01:07 PM

Anthony Holton's Amplifiers are good.
But they are not intended for Class A.

Now 160 W RMS in Class A is probably, in my opinion, to overdo audio.
Generally, 10-20 Watt Class A can outperform many 100-200 Watt Class AB amps.

Have a look at some of Nelson Pass classical articles/DIY projects in Class A
at
http://passdiy.com/

rhythmdiy · 12th December 2008, 02:54 PM

"""10-20 Watt Class A can outperform many 100-200 Watt Class AB amps."""

whoaaaaaaaaaaa how is that possible? what do u mean by outperform here?

rhythmdiy · 12th December 2008, 02:59 PM

are there any ready kits for class A amps?

11th December 2008, 06:30 PM	#1
rhythmdiy diyAudio Member Join Date: Dec 2006	how to bias Halton Precision amps in to class A Is there any method to bias the aussie amplifiers in class A... I think I can go with the http://www.aussieamplifiers.com/nxv500.htm module to get a generous 150watts RMS into class A mode but is there any mod to bias in class A... but sonically does it makes such difference?

12th December 2008, 09:46 AM	#3
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	4pair of To264 cannot do 150W of ClassA. It would need loaded supply rails of ~+-60Vdc and a bias current of about 3.1A. Total output dissipation ~370W, i.e. 46W/FET. __________________ regards Andrew T.

12th December 2008, 01:07 PM	#4
lineup diyAudio Member Join Date: Dec 2005 Location: the north	Anthony Holton's Amplifiers are good. But they are not intended for Class A. Now 160 W RMS in Class A is probably, in my opinion, to overdo audio. Generally, 10-20 Watt Class A can outperform many 100-200 Watt Class AB amps. Have a look at some of Nelson Pass classical articles/DIY projects in Class A at http://passdiy.com/ __________________ lineup

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12th December 2008, 07:18 AM	#2
rhythmdiy diyAudio Member Join Date: Dec 2006	please help me...

12th December 2008, 02:54 PM	#5
rhythmdiy diyAudio Member Join Date: Dec 2006	"""10-20 Watt Class A can outperform many 100-200 Watt Class AB amps.""" whoaaaaaaaaaaa how is that possible? what do u mean by outperform here?

12th December 2008, 02:59 PM	#6
rhythmdiy diyAudio Member Join Date: Dec 2006	are there any ready kits for class A amps?

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