Tube DIY Asylum

Tube (Lo Zin/lo gain) -buffer

165.225.68.49

pix

Hi!
I am planing to use the miniDSP 2x4 as an active pre-amp in my tube/horn system.
However the low input impedance (6K Ohm) perturb me, so I figure i should put a tube buffer (low input inpedance/ no gain) in front of it.

I prefer not going to CF-circuits as I Think they often sounds boring.
I figure a CG 6AS7/6080 or a CG 12B4A circuit could be of use.

Any sugestions for alternative cicuits?

Follow Ups:

So, you want to spend hundreds of dollars buffering a $100 DAC? - Chip647 05:02:44 06/26/15 (4)
You will get vastly better sound spending that money on a decent DAC that does not need buffering on the input or output.

If you are truly DIY, the Twisted Pear DACs are the way to go.
- Twisted Pear (Open in New Window)
- RE: So, you want to spend hundreds of dollars buffering a $100 DAC? - pix 10:37:01 06/26/15 (3)
  The buffer is needed betwean my Tube Phono amp (Zout=2K) and the miniDSP, not the DAC and miniDSP..
  - Why. . . . - Cpwill 15:11:46 06/27/15 (1)
    . . . put a DSP in your analogue phono path? Totally defeats the purpose of analogue, n'est-ce pas? Unless all you spin are digitally remastered stuff.
    - RE: Why. . . . - pix 11:46:04 06/28/15 (0)
      The DSP gives me the opotunity to easyly set up my crossover setup. And when I can�t go any futher with it, I try to copy it in a analouge dito
  - RE: So, you want to spend hundreds of dollars buffering a $100 DAC? - Chip647 17:15:43 06/26/15 (0)
    A decent DSP will have an input impedance of +25k
    
    On the flip side, your 2K to 6K interface will give you ZERO problems.

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