Schiit Saga Thread

Discussion in 'Preamps' started by HitmanFluffy, Feb 2, 2017.

  1. Kratos

    Kratos Rando

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    Thx for your help. I usually use the tube stage. Only had time for a quick test tonight. Couldn't hear a difference between passive and tube. Not sure, because I only listened to a couple of records tonight, but i left Loki switched off this time (it makes the little bit of hum I still have louder) and for some reason the music sounded better to my ears. More natural and less fatiguing. But as I said, for now it's only a short impression. Will do some more tests these days.
     
  2. rlow

    rlow A happy woofer

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    A question about input impedance on Saga (which appears to be the same on Freya).

    I was reading a review of the BorderPatrol SE DAC and noticed they recommend a minimum of 20k ohms input impedance on the preamp - I’m wondering if the input impedance of 10k in the Schiit preamps is typical or is this considered low? Also, what does it take to raise the input impedance? Does it do any harm (sonically or otherwise) to add more input impedance (if possible)?
     
  3. Cspirou

    Cspirou They call me Sparky

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    @rlow - The input impedance is determined by the stepped attenuator since it has a tubed input. Adding additional resistance won't fix this, you would need to change the resistors in the preamp itself.

    Probably better off with something different unless you want to add an additional stage or void the warranty on the Saga.
     
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  4. rlow

    rlow A happy woofer

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    Ok thanks, thought that might be the situation. To one of my other questions, is 10k considered lower than typical? Could this present an issue for other sources paired with Saga/Freya as well?
     
    Last edited: Oct 9, 2018
  5. msommers

    msommers High on Epipens

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    10,000 ohm input doesn't seem low to me. Most DACs are going to easily be 500 ohms or less (often less) which shouldn't be an issue at all. For example when impedance matching preamps and power amps, I've often read of the minimum x10 rule, better the x20 (preamp output : power amp input)
     
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  6. Cspirou

    Cspirou They call me Sparky

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    It's typical for a lot of pro amps since it's expected that they are used with a preamp. Also as @msommers says, DAC output impedance is usually pretty low. The Border Patrol DAC has a tubed output so it messes some things up.

    For a preamp though I would say that 10k is on the low end. Using a Magni 3 as a pre would work since it has a 50k input.
     
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  7. rlow

    rlow A happy woofer

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    Awesome info thanks. I wondered why the BP DAC had such a high output impedance compared to typical. Didn’t realize tubed output drives it up.
     
  8. msommers

    msommers High on Epipens

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    You'll find that's why it can be tricky (sometimes) to match tube-pre's with SS power amps, especially older SS like Pass Labs.
     
    Last edited: Oct 9, 2018
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  9. AudioNut

    AudioNut Rando

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    I just thought I'd mention this because I've never seen it posted anywhere, but I can confirm that the opening in the Saga's chassis is wide enough to accept globe-style 6SN7 tubes like the Shuguang Treasure Series SE. It just barely fits, but there is about a millimeter (or a bit less) of spacing all around the tube... the tube doesn't make contact with the chassis.

    (Great tube, by the way. Arguably overpriced, but competitive with the better NOS tubes I've tried, though I've never managed to try a red base RCA, and as a bonus it looks kind of cool.)
     
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