Preamp based on the Pass 1.7

Discussion in 'Preamps' started by Peter, Nov 16, 2018.

  1. msommers

    msommers High on Epipens

    Friend
    Joined:
    Nov 6, 2016
    Likes Received:
    2,862
    Trophy Points:
    113
    Location:
    Calgary, Alberta
    Home Page:
    Love the description:

    Sound features:

    Voices are mellow and sweet, low frequency elasticity & strong, and high frequency is slim.
     
    • Like / Agree Like / Agree x 1
    • List
  2. uncola

    uncola Friend

    Friend
    Joined:
    Sep 27, 2015
    Likes Received:
    544
    Trophy Points:
    93
    Location:
    Oahu, Hawaii
    I definitely hear an improvement when using a preamp or integrated instead of the sabre built in digital attenuation.. even with my oppo sonica which has the newest 9038pro chip. Had great results with my Hattor mini active preamp and the kinki ex-m1 integrated amp volume control
     
    • Like / Agree Like / Agree x 1
    • List
  3. Peter

    Peter Rando

    Joined:
    Jun 19, 2017
    Likes Received:
    20
    Trophy Points:
    8
    Location:
    New Zealand
    I am enjoying it very much, have everything now, cables, attenuators, etc. I just set the volume to around 12 o'clock and use the remote controlled variable volume out from my dac. I have tried a pre amp with a simple stepped attenuator instead of this but the downgrade involved in doing that is very clear.
    Plusses: Beautiful sound and flexible connectivity.
    Minus: You can hear the internal transformers hum when you are a meter or lesss away from it.
     
  4. Peter

    Peter Rando

    Joined:
    Jun 19, 2017
    Likes Received:
    20
    Trophy Points:
    8
    Location:
    New Zealand
    I experimented with using the RCA out to drive headphones. Very nice indeed ;) No need for any special headphone amplifier.
     
  5. Peter

    Peter Rando

    Joined:
    Jun 19, 2017
    Likes Received:
    20
    Trophy Points:
    8
    Location:
    New Zealand
    Currently using it to drive HD600s and it is totally addictive.
     
    • Like / Agree Like / Agree x 1
    • List
  6. Pars

    Pars Rando

    Joined:
    Jan 11, 2017
    Likes Received:
    4
    Trophy Points:
    3
    Location:
    Chicago
    A couple of years late on this, but whatever. The commercial Pass Aleph P preamp has a pair of gain controls which would have alleviated your problem with too much gain. The diy boards that I have seen (and built) also accommodate this. It uses a pair of 2K linear volume pots. Using this, you should be able to reduce the gain to a level where you no longer would need to use the digital volume on your source.
    I liked the diy raw preamp that I built so well that I just bought the commercial Aleph P1.7 after calculating what I would spend for casework, I/O, etc. to finish the diy version to match the commercial one.
     

Share This Page