Tweakers' Asylum

• RE: Best resistor for in line matching at i/p to power amp - Wally 02:58:12 08/23/07 (4)
  In Reply to: RE: Best resistor for in line matching at i/p to power amp posted by Ugly on August 22, 2007 at 12:57:26

  I'm not that bothered about measured specs, more concerned about sound quality.
  
  

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  • Since it is audio band and not aqn RF app.... - Ugly 07:36:39 08/23/07 (3)
    In Reply to: RE: Best resistor for in line matching at i/p to power amp posted by Wally on August 23, 2007 at 02:58:12

    I think realistically in this application you want to minimize noise for best sound quality. As I aluded to before CF/MF will have lowest inductance. Lowest inductance (at the levels typically found in various resistor types) is really only a concern for the RF band and very insignificant for the audio band. So on second thought may not be the absolute best sounding.
    
    Wirewound will likely exhibit the lowest contact noise. Definitely lower than a metal film or carbon comp type. The other concern would be thermal noise. My gut feel is saying maximize power rating to lower thermal noise but this is more of an intuition so be careful quoting me on that one.
    
    In summary: If you could find a wirewound in a high power rating package that had some sort of inductance minimization, I'm thinking thats about as good as you can do here with earthly materials.
    
    

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    • Forgot Shot noise but this will be low for input circuits as it's proportionl to current. - Ugly 08:50:08 08/23/07 (1)
      In Reply to: RE: Since it is audio band and not aqn RF app.... posted by Ugly on August 23, 2007 at 07:36:39

      I'm adding this just to be complete for future reference since you already made your choice.
      
      

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      • Cool link talking about resistor audibility. - Ugly 08:57:40 08/23/07 (0)
        In Reply to: RE: Forgot Shot noise but this will be low for input circuits as it's proportionl to current. posted by Ugly on August 23, 2007 at 08:50:08

        This guy explains it well, with equations.
        

        • Resistor Types, Does It Matter?   (Open in New Window)

        
        

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    • RE: Since it is audio band and not aqn RF app.... - Wally 08:16:58 08/23/07 (0)
      In Reply to: RE: Since it is audio band and not aqn RF app.... posted by Ugly on August 23, 2007 at 07:36:39

      I went for Audionote tantalums in the end. Lots of people say how good they are and they are not that expensive (well, quite expensive for a resistor I suppose).
      
      

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