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What is Class A anyway?
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Graham Slee View Drop Down
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Joined: 11 Jan 2008
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    Posted: 29 May 2011 at 12:27pm
I know of two amps by respected manufacturers (and I'm not saying who) that are claimed to be class A or pure class A, but only do class A for the first 1/3rd to 1 watt!

So, if two manufacturers do this then how many more?

And is this legal?

If it is, then can I claim my new Proprius mono-blocks to be class A if I wind up the bias servo so the output stage conducts 200-250mA (instead of the common 10-50mA for class AB) which will make them do the first 1/3rd watt in class A?

I would have thought this a con to be quite honest, but if some of you think this sort of specmanship is kosher....?

Your views please.
That none should be able to park up and enjoy the view without a smartphone and the knowledge in how to use apps
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mrarroyo View Drop Down
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Points: 1401 		Post Options Post Options   Thanks (0) Thanks(0)   Quote mrarroyo Quote  Post ReplyReply Direct Link To This Post Posted: 29 May 2011 at 1:31pm
It is a scam for the un-educated buyer. Sadly it has become the norm because we as buyers have allowed it!

Edited by mrarroyo - 29 May 2011 at 1:31pm
Miguel
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Points: 9695 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Fatmangolf Quote  Post ReplyReply Direct Link To This Post Posted: 29 May 2011 at 4:07pm
Graham, thanks for asking! My opinion is that your reputation is based on being honest about your products and the hard work that goes into them. I share mrarroyo's feeling that we buyers have encouraged marketing on "Class A," "upsampling," and other jargon instead of the SQ.
 
Mind you that 200-250mA would need a sizeable heatsink which could double up as a bun warmer...
Jon

Open mind and ears whilst owning GSP Genera, Accession M, Accession MC, Elevator EXP, Solo ULDE, Proprius amps, Cusat50 cables, Lautus digital cable, Spatia cables and links, and a Majestic DAC.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Guests Quote  Post ReplyReply Direct Link To This Post Posted: 29 May 2011 at 4:22pm
Where's me glasses...............
 
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Graham Slee View Drop Down
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Points: 16314 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Graham Slee Quote  Post ReplyReply Direct Link To This Post Posted: 30 May 2011 at 6:00pm
Originally posted by ABPest ABPest wrote:

Where's me glasses...............
 


Interesting reading... all those amplifiers and still very little in the region of satisfaction Wink
That none should be able to park up and enjoy the view without a smartphone and the knowledge in how to use apps
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