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Resistor power rating analog board DAC kit 4.1

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I would like to know if 0.5 Watt is suffici�nt on all positions on the analog board. I would like to swap a few resistors for different ones.

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RE: Resistor power rating analog board DAC kit 4.1 - AstroSonic 07:30:36 02/07/12 (11)
To be safe, use resistors with equal or greater power rating. To verify, measure the voltage across them. Power equals the square of the voltage divided by the resistance (ExE/R). Then double the calculated power and pick a resistor with the next higher power rating. Don't forget that resistors need breakin time. To save time in your search for better sound, try the AN tantalum resistors first!

Good Luck,

Bob
- RE: Resistor power rating analog board DAC kit 4.1 - Mark V. 11:00:32 02/08/12 (0)
  Thanks Bob,
  
  I can measure the voltages.
  
  I already have the AN Tants, but would like to try something else!
  
  Mark.
- RE: Resistor power rating analog board DAC kit 4.1 - Bones13 11:10:08 02/07/12 (9)
  My 4.1 kit came with AN Tantalum resistors. I did up grade my 2 power supply board resistors prior to building. (I got the "M2 PSU Upgrade" kit from Parts Connexion and the 4 for the digital PSU)
  
  Hard to beat the brown AudioNote Tantalum resistors.
  - RE: Resistor power rating analog board DAC kit 4.1 - Mark V. 11:03:37 02/08/12 (8)
    Bones13,
    
    I hope I can make it better with a mix of Charcroft and Amp Ohm, but I will see. (hear)
    
    Did you try the Power Supplies with "standard" resistors first? If yes, what is the sound difference what can be expected?
    
    Mark.
    - RE: Resistor power rating analog board DAC kit 4.1 - Bones13 18:53:21 02/09/12 (1)
      Nope, not an eternal upgrader. My DAC 4.1 is still under construction.
      - RE: Resistor power rating analog board DAC kit 4.1 - Mark V. 10:45:31 02/10/12 (0)
        
        In Reply to: RE: Resistor power rating analog board DAC kit 4.1 posted by Bones13 on February 09, 2012 at 18:53:21
        
        O.K. good luck with your build! It's a REALLY nice DAC! (and I owened an original (older) AN DAC 3.1X before) I let it drive directly my power amp, as every pre-amp I had up to today did change the sound but only in a negative way.
        
        Mark.
    - RE: Resistor power rating analog board DAC kit 4.1 - Mark V. 14:26:14 02/08/12 (5)
      I measured the voltages, only R7/R8 needs to be 1W version, the others are way below 0.5W.
      - RE: Resistor power rating analog board DAC kit 4.1 - AstroSonic 12:29:01 02/09/12 (4)
        
        In Reply to: RE: Resistor power rating analog board DAC kit 4.1 posted by Mark V. on February 08, 2012 at 14:26:14
        
        Never tried Charcroft. Before you replace any tant's, be sure to give them 25 - 50 hours of play time. It's easy to react to a sound issue that would have resolved on its own in a matter of hours.
        
        In the power supply, replacement of the resistors around the regulator with AN tants, along with cap upgrades (oil caps) makes a substantial difference in sound quality. The right conmbination is up to you. It is easy to cause the sound to go overboard with detail. It comes down to personal preference, but it's not all that difficult to get a substantial audible gain in detail, bandwidth and solidity while preserving a natural level of warmth. The result depends on the total system: amplification, sources, interconnects, speakers and room acoustics.
        
        Regards,
        
        Bob
        
        RE: Resistor power rating analog board DAC kit 4.1 - Mark V. 14:41:53 02/09/12 (3)
        
        In Reply to: RE: Resistor power rating analog board DAC kit 4.1 posted by AstroSonic on February 09, 2012 at 12:29:01
        
        Thanks for your response Bob.
        
        My DAC already has quite some "milage" ;-) (few 100 of hours)
        
        It's a bit hard for me to understand that replacing the Mundorf caps in the power supply with oil caps does increase detailing. As the AN oil caps in the signal path normally warm up the sound with less detail compared to the Mundorfs.
        
        What was a great upgrade in my DAC was the swap of the coupling cap (AN copper foil mylar/oil) for a Duelund VSF-CU cap. Loads more detail, "air" and depth, but still very nice midrange with enough warmth, extremely good bass. Before the Duelund I have tried the V-Cap CuTF, that was horrible... I gave it lots of playtime, but with this cap my DAC refused to play MUSIC. Loads of detail, but no music...
        
        I will try a mix of Charcroft, Amtrans AMGR and perhaps also Shinkoh tants. I like it when the sound is a little on the warm side, so I will use the carbon Amtrans as plate load resistor, where it can shine. Charcroft in the signal path, as it seems to be the most "wire like" resistor you can get.
        
        At this moment (with the AN tants, Duelund coupling cap and Philips E182CC) my DAC is almost as neutral as it can get. When the recording is warm sounding, it sounds warm, when the recording is harsh it sounds harsh, etc. I like it a little more "rounded" but I definatly don't want to loose the loads of detail and "air" I gained with the Duelund. I "think" I can reach my goal with different resistors, as they don't have massive influence on sound, but they can smooth out a little bit.
        
        Mark.
        
        RE: Resistor power rating analog board DAC kit 4.1 - AstroSonic 09:05:18 02/13/12 (2)
        
        In Reply to: RE: Resistor power rating analog board DAC kit 4.1 posted by Mark V. on February 09, 2012 at 14:41:53
        
        "It's a bit hard for me to understand that replacing the Mundorf caps in the power supply with oil caps does increase detailing. As the AN oil caps in the signal path normally warm up the sound with less detail compared to the Mundorfs."
        
        My kit did not come with Mundorfs. I am currently running a Mundorf silver/oil and AN cu/oil. I preferred this to having both as Mundorfs.
        
        I have not tried the Deuland caps. Still using the AN cu/oils. I prefer these to various teflon caps. The latter sound (in my system) more detailed, but harmonically a little threadbare.
        
        Which output transformers are you using?
        
        IME, resistors often have a substantial impact on sound quality. Let us know how your resistor upgrades work out.
        
        Good luck,
        
        Bob
        
        RE: Resistor power rating analog board DAC kit 4.1 - Mark V. 11:59:30 02/13/12 (1)
        
        In Reply to: RE: Resistor power rating analog board DAC kit 4.1 posted by AstroSonic on February 13, 2012 at 09:05:18
        
        I have the C-core (balanced) transformers. And my power supply has one AN Cu/oil and one Mundorf (Extreme?) cap inside. (that way it came from AN kits)
        
        RE: Resistor power rating analog board DAC kit 4.1 - Nounours18200 13:31:56 10/07/12 (0)
        
        In Reply to: RE: Resistor power rating analog board DAC kit 4.1 posted by Mark V. on February 13, 2012 at 10:59:30
        
        Why do you say: "Never tried Charcroft. Before you replace any tant's, be sure to give them 25 - 50 hours of play time. It's easy to react to a sound issue that would have resolved on its own in a matter of hours." ???
        I agree that burn in can solve a lot of pbs, but have you already been disappointed by the Charcroft resistors ?
        Thanks

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