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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. Aeolus Kratos
    Just to let you guys know, there will be a 16% discount for nearly ALL products in Bottlehead in one day only - 29th Feb. I doubt there won't be a better time to get the fantastic budget Crack amp or the marvelous Mainline amp.
    Happy shopping!
  2. NightFlight
    So Doc,
    20% in 2020?  [​IMG] 
  3. NightFlight
  4. Doc B.
    I don't even know if I'll still be selling amps in 2020. Might be spending the hundreds of billions we've made selling kits to run against Donald Trump in his re-election bid, or maybe I'll accept the invitation to go back with the Alpha Centaurians to their gas giant home planet after they visit Earth in 2018. 
    So many decisions...
    OJNeg and jodgey4 like this.
  5. JamieMcC

    I assumed they were nos as he had 27 available mine looked in good condition for their age the pins were clean and looked unused.
  6. punit
    Used Mainline Prototype for sale. Interesting, looks quite different from a Mainline :
  7. Doc B.
    Yes, it is quite different and the use of the name Mainline is not really accurate. It uses the same output tubes and pretty much all else is different. If I thought some of the differences in there were improvements they would probably have been used in the production version of Mainline. There's a reason for making prototypes before a design is finalized, you can evaluate the prototype and improve from there. It's probably a nice sounding amp and certainly has a nice cabinet and a very good looking layout. It's just not a Mainline.
  8. theblueprint
    @Doc B.
    Is Bottlehead coming to Canjam this weekend? I would love to listen to the Neothoriator again and the Mainline with the Tape Project. [​IMG] 
  9. Doc B.
    Sorry to say we won't be there. We've had a very busy month at Bottleheadquarters with lots of new projects in the works, and we are committed to getting those finished for everyone who has been patiently waiting to see them become available. Maybe I need to come up with a DIY cloning kit so I can be in more than one place at one time.
    As regards Head-Fi meets in general, we will be hosting a meet at BHQ at the end of April. These meets have grown into truly worthy events over the past three or so years, and though not the size of a Canjam we typically see 30-40 attendees and it's pretty amazing just how much gear the local (meaning not only Seattleites but also Head-fiers from Portland to Vancouver B.C.) gang brings for everyone to try out. For those up for a little travel I think the meet could be a good opportunity to hear not only our gear but lots of other cool stuff too. Did I mention there's a craft brewery next door? 
  10. gab840
    Building sex kit for beyer t1
    At what ohm impedance output shall i configure transformer
    4,8,16 or 32
    In manual btw its mentioned 32 for headphones
  11. Doc B.
    Yup, start with 32 ohms for the Beyer T1s. Nothing is harmed by trying different output impedance settings and I would encourage experimentation to find what suits your taste. If you decide to use lower impedance cans in the future I would suggest trying the 4 ohm setting, for best signal to noise ratio and a little more range on the volume control with sensitive cans.
  12. suponaudio
    Anyone try the Mainline with the HD 800 S's yet?
  13. skeptic
    I'm running my mainline with hd800's, tweaked with a superdupont resonator and cork mods (google it!) (which replicate the changes in the hd800s, taming of the 6k peak, but have significantly less LF distortion and less of a peak at 15khz, per Innerfidelty). It is headphone audio at its finest to my ears.
  14. suponaudio
    The Mainline is next on my list, currently running a Schiit Bifrost Multibit/Modded BHC+SB with my HD 800 S's.
  15. skeptic

    Very nice! Mainline should be right up your alley - retaining that wonderful bottlehead house sound, but substantially improving on the already venerable crack + sb across the board. The resolution, transparency, speed and bass detail are all in a different league, and the beautifully refined trebles make it ideally suited for hd800(s). The build is also immensely satisfying and makes you appreciate the great sq that much more.
    JamieMcC likes this.
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