Neurochrome HP-1

Discussion in 'Headphone Amplifiers and Combo (DAC/Amp) Units' started by Cspirou, Oct 26, 2016.

  1. tomchr

    tomchr MOT - Neurochrome

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    In modern designs, there is really no benefit of a fully balanced design, at least not in terms of the listening experience. A balanced design, in theory, cancels the even order harmonic distortion components. Unfortunately those are the ones associated with a pleasing listing experience, whereas the odd order THD products (associated with harshness) are left behind. Secondly, cancellation schemes tend to work really well on paper, but not so well in reality. In some cases the cancellation circuit actually makes the THD worse.
    Also note that many "balanced designs" are actually two single-ended paths driven in opposite phase rather than a true balanced circuit. So buyer beware.

    In case of the HP-1, the distortion is so low that there's practically nothing left to cancel. Any attempt of cancellation of the remaining THD is likely to be either futile or detrimental to performance.

    The HP-1 features a balanced and an unbalanced input. From the input buffer through to the output, the HP-1 is single-ended for the reasons listed above. You will get better channel separation if you use the XLR output.

    Tom
     
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  2. tomchr

    tomchr MOT - Neurochrome

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    BTW: I have a fresh stack of professionally assembled boards in stock. I think I'm down to four enclosures, but more can be ordered.

    The boards are assembled in Calgary. I found a local place that specializes in small orders. Their work is of top notch quality.

    Tom
     
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  3. zhouharvey

    zhouharvey PayPal’s $2 Sensible Enforcer

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    Thanks!!! That really helped!
     
  4. zhouharvey

    zhouharvey PayPal’s $2 Sensible Enforcer

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    I'll get a chance to audition it soon this weekend!!!!!!!!!!!!!!!!!!!!!!!!!!!!! I love something the Objective2 wanted ever to be! Neutral and doesn't lose the timbre.
     
  5. zhouharvey

    zhouharvey PayPal’s $2 Sensible Enforcer

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    Neutral. I'll test it with a pair of HD6xx and with my coming minidsp ears.
     
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  6. tomchr

    tomchr MOT - Neurochrome

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    I gotta say that the HP-1 drives my newly acquired Massdrop Focal Elex rather well.

    Tom
     
  7. tomchr

    tomchr MOT - Neurochrome

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  8. tomchr

    tomchr MOT - Neurochrome

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    One demo unit is available. It's in Los Angeles and will ship within the US using USPS Priority Mail. This particular HP-1 is in the original blue colour scheme and was demoed at CANJAM in NYC in February. $949.

    I have one of the stealthy grey graphite HP-1s in stock with four more arriving within about a week to ten days. That'l be the last of the HP-1. They're $999 each.

    I used to sell these at $1249/each, so you're getting quite a deal here.

    I'm down to five PCBs for those who prefer the DIY option.

    All of these are available through my website: https://www.neurochrome.com/product/hp-1-ultra-high-end-headphone-amp-2/

    Thanks,

    Tom
     
  9. tomchr

    tomchr MOT - Neurochrome

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    I have two of the fully assembled HP-1s left. Their chassis are underway by FedEx and will be here tomorrow. Just in time for me to put the amps together over the weekend, test them, and ship by Monday.

    I have three PCBs left for those who are more DIY inclined.

    You can find them here: https://www.neurochrome.com/product/hp-1-ultra-high-end-headphone-amp-2/

    Tom
     

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