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• RE: That's OK if you are willing to accept some LF attenuation ... - Frihed89 14:26:58 02/18/15 (3)
  In Reply to: RE: That's OK if you are willing to accept some LF attenuation ... posted by Naz on February 18, 2015 at 14:15:09

  No, it's not. JA pointed it out in the review in Stereophile. The output stage is an anode follower (with 2 ECC188); that was his explanation, as I recall.

  I guess that's a cathode follower on the anode, instead of the cathode? You can tell me why that raises the impedance in the bass. I'm an economist. I can tell you what upper hemi-continuity of a utility function is!

  :)

  
  
  Observe, before you think. Think before you open your yap. Act on the basis of experience.
  
  
  

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  Edits: 02/18/15

  • Ahh, Plate Follower ... - Naz 16:44:40 02/18/15 (2)
    In Reply to: RE: That's OK if you are willing to accept some LF attenuation ... posted by Frihed89 on February 18, 2015 at 14:26:58

    That makes all the difference and starts to make some sense. In fact, depending on the amount of feedback utilised a coupling cap of 0.22uF could be quite adequate because the feedback compensates for what would normally result in reduced LF. It's even possible to design for slight LF boost.
    
    It pays to know exactly what we are dealing with and what your specific goal is. If we can see a schematic we can tell you precisely what to do to achieve your goal. This may not entail swapping OP caps at all.
    
    Naz
    

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    • RE: Ahh, Plate Follower ... - Frihed89 01:31:44 02/19/15 (1)
      In Reply to: RE: Ahh, Plate Follower ... posted by Naz on February 18, 2015 at 16:44:40

      Thanks, but there isn't one and the circuit is on a board and i can't follow it.
      
      I am wondering if you can tell me what would happen if I hooked up a TVC to this Dac, and whether I am not better off simply attenuating at the preamp output (because of high gain in the DAC and amp) with my one pair of 95dB sensitive speakers.
      Observe, before you think. Think before you open your yap. Act on the basis of experience.
      
      
      

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      • RE: Ahh, Plate Follower ... - Naz 01:48:39 02/19/15 (0)
        In Reply to: RE: Ahh, Plate Follower ... posted by Frihed89 on February 19, 2015 at 01:31:44

        Is excessive gain your only problem & is this the only reason for wanting to hook up a tvc?
        
        It would be possible but there are other cheaper & possibly better ways to accomplish the same thing. You may need some technical expertise though.
        
        Naz
        
        
        
        
        

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