Recent content by MBL'er

  1. MBL'er

    Measurements of Musician Pegasus R2R DAC

    I never listened to the DX7, so I really cannot make any comment about that. When I tested the Pontus I vs my Topping D70S (level matched, both blind and sighted), the Pontus made a very poor show in every department: recessed and "cavernous" voices, weak bass, lack of details and engagement...
  2. MBL'er

    Denafrips ARES II USB R2R DAC Review

    Actually I wrote "at least" 1/10. As I said, I am no technician, I just listen to music through hi fi gear. If you would like to get more into that, please pm me your email address and I will put you in contact with a tube amp designer I sometimes co-operate with - NY born so you will not have...
  3. MBL'er

    Denafrips ARES II USB R2R DAC Review

    "in theory" does not mean that there is a formal theory, but rathe "it should be like that" Please do not get that literal path, I teached for 13 years business strategy and corporate finance at the Rome University ...
  4. MBL'er

    Denafrips ARES II USB R2R DAC Review

    I have a friend who designs and manufactures tube amps. I got the info on impedance mismatch effects from him. From what I understand on R2R designs, also having read some articles on Soekris site, it seems that the resistors rails have "voltage output", so they do not need the I/V stage. By...
  5. MBL'er

    Denafrips ARES II USB R2R DAC Review

    You are correct, best match is through unbalanced. In theory, to perfectly match the Ares II the pre should have at least 24,000 Ohm on balanced input and 12,000 Ohm on unbalanced. M
  6. MBL'er

    Denafrips ARES II USB R2R DAC Review

    In theory yes, as the preamp input impedance should be at least 10x the dac output impedance, or the bass performance deteriorates (as told by my friend amp designer). In personal practice, I connected the Musician Pegasus (same output impedance as the Ares II) to my preamp trying both the 50K...
  7. MBL'er

    Denafrips ARES II USB R2R DAC Review

    Do you know the input impedance of the Pre D90 ?
  8. MBL'er

    Denafrips ARES II USB R2R DAC Review

    That could also be. The Pegasus in NOS mode sounded compressed on the top end and muddy in anywhere else.
  9. MBL'er

    Denafrips ARES II USB R2R DAC Review

    I really do not know first hand. A friend of mine, deep in electronics, told me that R2R dacs can have sample to sample differences in the resistor rails. Based on measurements, in the audible zone both the D70S and the Pegasus should sound the same. But, then, the Pegasus somewhat smoothes...
  10. MBL'er

    Denafrips ARES II USB R2R DAC Review

    I had for almost two months both the D70S (my currently "resident" dac) and the Musician Pegasus, a close cousin of the Ares (but not identical). In my 2 channel system they did not sound the same. Not even closely. Blind, sighted, level matched, with "audio friends", with my "industry guy"...
  11. MBL'er

    Topping D70s MQA Review (DAC)

    A friend uses a 110 Ohm aes ebu cable from the music server (Bladelius Embla) to the D70S and is quite happy. He preferred the aes ebu connection over usb and spdif (all available on the Embla).
  12. MBL'er

    Topping D70s MQA Review (DAC)

    @Rinaldi Moreira I tested the Pontus, first non-updated model, not the Pontus II. System comprised Coctail Audio X50 streamer, T+A V10 tube integrated amp and ProAc monitors.
  13. MBL'er

    Measurements of Musician Pegasus R2R DAC

    I fully agree on the D70S, which I extensively tested vs Pegasus and Pontus I: former nearly made it, latter had too much no man’s land to recoup. In hi fi I see a clear trend towards the “luxury end”: higher profits per unit built and sold, more money to channel into the system (bloggers...
  14. MBL'er

    Measurements of Musician Pegasus R2R DAC

    Agree, crazy out of the world price.
Top Bottom