Schiit Vidar Impression Thread - UPDATED WITH REVIEW (CHECK FIRST POST)

Discussion in 'Power Amps' started by Rotijon, Jul 17, 2017.

  1. dark_energy

    dark_energy Friend

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    Last edited: Feb 28, 2019
  2. dark_energy

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    Did not want to highjack the thread. Just had some questions that got answered already.

    It seems to me that big woofers are still relatively high impedance load that need enough voltage and current to drive them properly.
     
  3. Kernel Kurtz

    Kernel Kurtz Friend

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    Interesting discussion as is often the case here. From my perspective (read to the best of my hearing ability), while Vidar is certainly going to be limited in momentary output power by how much current the PSU can deliver like any amp, in long term listening mono into 4 ohms the ability to dissipate heat still seems to be the main consideration here. I've gotten really good at finding that line where it will maintain a sustainable peak temperature through hours of listening. It only takes an extra click or two on Freya's attenuator to reach the tipping point where it no longer dissipates the heat it is making and starts a long slow climb until it shuts down. I attached some temperature sensors to the heat sinks, and it's interesting to watch how responsive the thermal output is. When listening to an album with a lot of dynamic range you can see the temps starts falling when one is listening to quiet passages, and then start climbing again when the loud parts begin. Some albums have quite a few "degrees" of dynamic range.

    Anyway, even though they may not be officially rated for this use case, I LOVE my Vidars, and my Maggies. They are not going anywhere.

    [​IMG]
     
    jpelg, tranq, BenjaminBore and 7 others like this.
  4. dark_energy

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    Considering the high impedance peak of mentioned drivers it seems high voltage is needed to scale that to get enough dB at resonant freq which is efficient region to begin with. Not a lot current would be needed, but enough.(Originally was replying to @BenjaminBores linked article. )

    Naim outputs @1 Ohm: 11.4V and 11.4A
    @4 Ohm: 26.68V and 6.67A
    @8 Ohm: 28.8V and 3.6A

    Added
    Vidar @4 Ohm: 28.1V and 7.1A
    @8 Ohm: 28.3V and 3.5A
     
    Last edited: Feb 28, 2019
  5. BenjaminBore

    BenjaminBore Friend

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    This was my general understanding also, though I was unaware of the ties between resonant frequency and impedance. Thanks

    I have nothing to compare it too yet but my impression is that the Vidar has no problem handling the ATC SCM11s whatsoever, including EQing a little more bass extension. Which given their already low sensitivity is no small feat. I keep equating the little brute to the U.S.S. Defiant.
     
  6. BenjaminBore

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    Saga & Vidar Driving Planars
    I jury-rigged the LCD-2C and Abyss 1266 up to my Saga/Vidar to see what all the fuss was about. Well, the fuss is legit. More so than I expected, but with some significant trade offs.

    Gungnir Multibit A1 -> DEQ2496 (bypassed) -> Saga w/ Stock NOS -> Vidar

    Due to the cabling situation I was able to compare the LCD-2C only with the SE out of the Mjolnir 2, though a number of times. But with the Abyss it was Mjolnir 2 BAL, Saga/Vidar, then Mjolnir 2 BAL and done.

    Overall there was an immediate and powerful sense of them coming alive. Slam and overall dynamism really improved notably. There was also an improvement in clarity and tactility, and an expansion of staging with a sense of it feeling more filled out. The LCD-2 no longer sounded nearly so laid back and soft, and seemed to benefit more so than the Abyss. They really did lap up that speaker amp juice.

    Two-channel amplifiers could really be the way to go for planars. Could be because I didn’t find the Saga/Vidar to be a viable route. The presentation was raw, and in comparison to the Mjolnir 2 suffered a reduction in overall fidelity, micro-dynamics, and general nuance. The power hum/buzzing sound was pretty loud on the LCD-2C, but if you’re listening with good volume you may not notice. The Abyss faired better here as it’s much less sensitive, and the volume pot is easily maxed with these. The biggest problem I had was ear discomfort bordering on pain, from either headphone. I can only guess that there was some inaudible high frequency noise coming through to cause this.

    So listening to planars from big boy amps certainly has merit, in principle. But you’ll need something better to make it worthwhile. Though it could be that different tubes, and power conditioning could improve matters. Especially in the ear pain department.

    Even with this setup they still couldn’t keep up with the Utopia, and that was also having fudged the fenestrated Utopia pads onto the Abyss to mimic the CC ones. Which does improve performance there, though with trade offs to slam and such.
     
    Last edited: Mar 12, 2019

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