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Re: Hanson seems to have unlearned some of the lessons in

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Mike Currie

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In Reply to: Hanson seems to have unlearned some of the lessons in posted by bjh on April 7, 2007 at 19:15:30:

I think you may need to go back and re-read the article. Hanson freely admitted in the manufacturer's reply that he made a mistake in fuse size for the 2 ohm full power test. As I read it, the installed fuse should have and did blow. Hardly a failure of the protection circuitry.

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So once again JA is the quality engineer... - vettracer 08:43:58 04/08/07 (9)
In almost every issue lately it seems that he is finding some "error" in a piece of high end gear. In this case the wrong fuse was installed.
If they can't get something simple like this correct in their top of the line $16500 amp it makes you wonder about the rest of the line
- Once again - Rufipennis 11:33:18 04/08/07 (7)
  bjh puts up a strawman.
  JA stated that the test conditions are beyond realistic levels, so who cares that an internal fuse blew? Not me.
  My "bottom-of-the-line" Ayre components have performed just fine so far, thank you. And if I do need service, many people on this forum (and others) have said that Ayre has some of the best customer service in the business.
  - who cares that an internal fuse blew? - vettracer 12:32:42 04/08/07 (0)
    Not me either. I am sure that Ayre would go out of their way to make it right.
    The greater concern is that Charles Hansen admitted that the Wrong component was installed at the factory. That just leads to the question about how many other wrong components are installed.
    In general JA is finding a high percentage of very expensive components with various assembly defects. This should concern us all because most of us do not have the ability to test to make sure the componenet is delivering all it should.
  - If what you say is correct isn't the strawman JA's. After all - bjh 11:41:41 04/08/07 (5)
    why perform a test to measure something "...beyond realistic levels", what possible purpose would there be in that?
    Then again there are some hi-end speaker systems that apparently present a difficult load, so who knows, perhaps the measurement might have some merit when considering suitable amplifier for such systems?
    No Guru, No Method, No Teacher
    - Re: If what you say is correct isn't the strawman JA's. After all - John Atkinson 12:18:02 04/08/07 (4)
      > why perform a test to measure something "...beyond realistic levels",
      > what possible purpose would there be in that?
      
      Considering it the equivalent of subjecting a car to lateral G on a
      skid pan way in excess of what the car will experience in 99.999% of
      normal use. The object is to find out where the device's limits lie.
      
      John Atkinson
      Editor, Stereophile
      - I guess it's a good thing - bjh 12:41:46 04/08/07 (3)
        
        In Reply to: Re: If what you say is correct isn't the strawman JA's. After all posted by John Atkinson on April 8, 2007 at 12:18:02:
        
        that most amplifiers, including moderately priced and even tube designs, routinely survive such tests. After all the prospect of you having to frequently apologize to manufacturers for breaking their amplifiers performing your tests would be, IMHO, a little embarrassing.
        BTW, why didn't you test the other monoblock to get the 2 ohm clipping point?
        
        No Guru, No Method, No Teacher
        
        Obviously JA didn't test the other mono because it would likely have the same failure... - vettracer 20:23:00 04/08/07 (0)
        
        In Reply to: I guess it's a good thing posted by bjh on April 8, 2007 at 12:41:46:
        
        No point in abusing things just to smell the magic smoke.
        
        Re: I guess it's a good thing - Charles Hansen 14:55:11 04/08/07 (1)
        
        In Reply to: I guess it's a good thing posted by bjh on April 8, 2007 at 12:41:46:
        
        < < BTW, why didn't you test the other monoblock to get the 2 ohm clipping point? > >
        If I had to guess, it would be just to piss you off, bjh.
        
        Re: I guess it's a good thing - Mike Currie 16:26:38 04/08/07 (0)
        
        In Reply to: Re: I guess it's a good thing posted by Charles Hansen on April 8, 2007 at 14:55:11:
        
        Wouldn't take much, it would seem.
- Plus JA's measurement sections provide a slice of objectivity that shouldn't be ignored. nt - TomLarson 10:37:39 04/08/07 (0)
I didn't see the manufacturer response so perhaps it - bjh 19:37:18 04/07/07 (4)
wasn't the failure I surmised but a failure it most certainly was, a particularly egregious one I might add since it lead to damage of a $16,000 (for the pair... did I get that correct?) amplifier. Pretty sad showing... IMO of course.

No Guru, No Method, No Teacher
- Re: I didn't see the manufacturer response so perhaps it - Mike Currie 20:21:32 04/07/07 (3)
  I'm really not sure where you're going with this, but I suggest that you read the response. It's pretty simple. Ayre had the wrong fuse in place, which blew (at 775 watts continuous into 2 ohms, a truly ridiculous real-life scenario) and took out a driver transistor when it did so. This is a case of human error, freely admitted in the publication, and NOT a failure of the protection circuitry as you wrongly surmised. Sad showing? Well, we all make mistakes, don't we?
  - I'm not going anywhere with it, it is what it is, if there's a problem... it's yours! nt - bjh 20:39:23 04/07/07 (2)
    .
    No Guru, No Method, No Teacher
    - No problem at all - Mike Currie 21:17:56 04/07/07 (1)
      If you can't distinguish between a simple human error which caused a 'failure' under conditions not to be reached under anything but extreme test circumstances and a fundamental design flaw (which you have implied), well, I'm certainly not going to try to convince you of anything. It is wise, however, to gain all the information available before criticising. Try it next time. Bye.
      - Re: No problem at all - bjh 21:33:14 04/07/07 (0)
        
        In Reply to: No problem at all posted by Mike Currie on April 7, 2007 at 21:17:56:
        
        As I have already said the problem "... wasn't the failure I surmised but a failure it most certainly was" this indicates to me you either have a problem comprehending or you're willfully playing dense. Either way I�m afraid I can't claim to be terribly interested so � Bye.
        
        No Guru, No Method, No Teacher