New Schiit / Preamps and Power Amp (was Putting the Schiit Signal Up)

Discussion in 'Preamps' started by purr1n, Oct 6, 2016.

  1. Madaboutaudio

    Madaboutaudio Friend

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  2. Cspirou

    Cspirou They call me Sparky

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    Heat tunnel? Is that like a heat pipe but bigger?

    I tend to think that the best practice is to keep your speaker cables short and your interconnects long rather than the other way. A stereo amp can stay on the equipment rack, but monoblocs should be placed as close to the speaker as possible. It should get much more ventilation like that.
     
  3. Clemmaster

    Clemmaster Friend

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    It's not.
    Heat tunel in this case is a high density heatsink in the middle of the amp that looks like a chimney.

    It's a much higher dissipation than the traditional -super thick - heatsink on the side of power amps, which need the be rigid so they don't bend/break when the amp is held. Those heatsinks are crap in terms of thermal efficiency... And super expensive.
     
  4. spwath

    spwath Hijinks master cum laudle

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    So like the Mac pro.
     
  5. drfindley

    drfindley Secretly lives in the Analog Room - Friend

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  6. HitmanFluffy

    HitmanFluffy Hoping to see real genitals someday!

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    Rega RP1 in there, ew.
     
  7. GoodEnoughGear

    GoodEnoughGear Evil Dr. Shultz‎

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    I'd love to see a pic of the back of that Schiit stack...
     
  8. uncola

    uncola Friend

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    here's what the old krell heat tunnels looked like.. that's where I First saw it used
    [​IMG] [​IMG]
     
  9. Xen

    Xen Friend

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    Was there a fan on this? Natural convection would not move enough air through that tight space to do hardly any cooling. Is that a fan mount on the bottom of the stack with an opening at the bottom of the case?
     
  10. uncola

    uncola Friend

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    Yup old Krells were pure class A speaker amps.. these were actively cooled with fans. The Vidal is the first I've heard of passive heat tunnels
     
  11. Madaboutaudio

    Madaboutaudio Friend

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  12. Ray

    Ray Friend

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    Seriously considering this combo for my he-6. Quite affordable considering the price of other power amps.
     
  13. Armaegis

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    Without being able to do computer analysis, my gut feeling would be to snip off the tip of the heat sinks so there's an empty central column that *might* promote faster air flow (but then you lose some conductive surface, hmm). The combined heat in the tunnel will already raise the temperature which will provide higher convection on its own, but natural convection so bloody slow.

    Hmm maybe Schiit should try some of this nifty tech...
    https://en.wikipedia.org/wiki/Electrostatic_fluid_accelerator
     
  14. Xen

    Xen Friend

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    Yeah, but if the air near the fins are nearly the same temp as the fins, very little heat will flow to the air. The deltaTemp above the heat sink would cause some convection, but 1) there is not enough air getting in and 2) the air temp inside is too high to for good conduction. The MacPro uses a fan (can't believe it's only 6.6" DIAMETER). The original Fruity iMac was fanless but didn't produce that much heat (earliest models) and had a large space with tapering to enhance air flow (Bernoulli's plus Thermo). Saw a tear down of Dyson's $500 Hairdryer. Not worth $500 but it does function very well and uses interesting engineering to produce so much air flow from such a tiny impeller.

    I would remove some lateral fins, like very other one, and that last middle ridge. Placing holes for the air get in would be an interesting challenge (where to put for most optimal influx of air and keep the inside air moving with laminar flow). Since the Krell's have a fan, that solves that. Interesting to see Schiit's design for their passive thermal convection tunnel.
     
  15. Armaegis

    Armaegis Friend

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    You've got a bit of chicken'n'egg going there though. If the heat doesn't conduct into the air, then the fins heat up, which increases deltaTemp, which increases heat flow, etc.

    I think simply having holes on the bottom and top is good enough. No need to have it sweep in from the sides or anything like that.
     
  16. Thad E Ginathom

    Thad E Ginathom Friend

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    [​IMG]

    More impressive than a mere tube sticking out of the top, eh?

    (And, to the left of that lamp post, you can just see part of the power supply.)
     
  17. ButtUglyJeff

    ButtUglyJeff Stunningly beautiful IRL

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    This might be a weird thought, but have we found out the power output of the Freya? I'm just wondering if it could drive an HE-6?

    Is it weird wondering that? I mean people use vintage receivers all the time, and the HE-6 likes tubes to tame the treble sometimes...
     
  18. Cspirou

    Cspirou They call me Sparky

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    Preamps don't really have power output because they aren't meant to power anything. You might be able to power some high impedance headphones, like the DT 880 or HD 650, but no way you'll power the HE-6. Just get a Jotunheim.

    Edit:

    Well if you really want to use tubes you can use the Freya with the Jotunheim. Just choose the tube output for the Freya and connect to the Jotunheim input. Keep the volume knob on the Jotunheim on max and control the volume with the Freya.
     
  19. Serious

    Serious Inquisitive Frequency Response Plot

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    I knew the nuclear power station pic would set off HE-6 talk.
     
  20. Thad E Ginathom

    Thad E Ginathom Friend

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    What nuclear power station? I need all that to get decent SPL out of my mere HD600s!

    But seriously: the system in my head is a pre-amp and active speakers. And I'd really like not to have to have a separate 'phones amp.

    (the system on my desk is currently a modest integrated amp, powering both passive speakers and the 'phones.)
     

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