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Bottlehead Amplifier Discussion / Comparison Thread: Crack, SEX & Mainline

Discussion in 'Headphone Amps (full-size)' started by loquah, Sep 24, 2013.
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  1. rbc3
     
    Yes, I just read that somewhere else the goal of turning the volume up as high as possible on the source device is to get the best signal to noise ratio as possible on the output.
     
  2. NightFlight
     
    Well, after months of leaving and returning to Russia (I imagine dancing/vodka/gypsies/cigars/vodka and the deep high seas) the beat up package covered in Cyrillic writing has finally showed! Initial impression is good. Gotta reel in the hype, only a few minutes in and will re-bias after break in. But I will reveal the 6S15P has ....
    nah. I'll keep this one quiet. :)
     
  3. Loquah
     
    What the? Did I miss something? Is there an alternate tube for the Mainline?
     
  4. NightFlight
    Page 97
     
  5. JamieMcC
     
     [​IMG]
     
  6. Loquah

    LOL. Turns out I even commented on it at the time...
     
  7. mcandmar
    Here is some info i posted on the Bottlehead forum which may be of interest to you Mainliners..
     
     
    IMG_1136.jpg
     
    IMG_1146.jpg
     
  8. Loquah
    You pushed me over the line! I officially bought a pair of 6S15P on eBay last night. Looking forward to trying some tweaks with my Mainline again. Hopefully it won't turn into an addiction! :wink:
     
  9. NightFlight
    I saw those. They were the same price as from Russia (and the post from the Ukraine is likely more reliable) the only dependency being the DOM differences. But I think they should still be quite close in spec.  I think that's it for rolling. I don't think there are any more drop-ins.
     
    When I biased the 6S15P to 145V (they were off by about -20V) then the differences between them and the EH tubes got smaller and it cleaned up a great deal.  But the properties that Jaime lays out are pretty much still there. I find it slightly less mid centric and more holophonic. I'm a sucker for the holophonics. Improved guitars/strings/space and slightly more punch in the bass are all welcome. Male vocals are a bit less emphasised but pretty much everything else is kicked up a notch.
     
    This is just comes from a quick listen before they've fully settled in. The impression of the difference was somewhat obvious after a swap, and then has lessened after biasing and continued listening as audio memory of the EH fades. Huge difference in audiophile terms. Reality? We're not so sure. :)
     
    Loquah likes this.
  10. Loquah
    6S15Ps turned up today. Looking forward to getting them out...
     
  11. Textfeud
    I saw that the Bottlehead S.E.X is discontinued. Will there be a successor? Wanted to buy one for planars and my Zu speakers :frowning2:
     
  12. Solarium
    My mainline is ugly, is there anyone who offer paint/sanding services? I want it to have a makeover or else I have to stash it somewhere out of sight!
     
  13. NightFlight
    Really? They say beauty is in the eye of the beholder. Just spray it gloss black and be done! :) Your listening to it, not looking at it.  Then again, I think mine turned out okay.
     
  14. Loquah

    Show us a picture and we might be able to suggest some solutions
     
  15. punit
    The Oppo PM 2 is a great match with Mainline. My bedside rig :
     
    oppoML.jpg
     
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