Burson Conductor V2

Discussion in 'Headphone Amplifiers and Combo (DAC/Amp) Units' started by TheIceman93, Jan 1, 2017.

  1. TheIceman93

    TheIceman93 El pato-zorro

    Friend
    Joined:
    Dec 17, 2016
    Likes Received:
    665
    Dislikes Received:
    27
    Trophy Points:
    93
    Location:
    SoCal
    I know some of Burson's past offerings were less than well received on this site but I figured this amp deserved its own thread anyways in case someone has had a chance to hear the new V2 version.

    The only published review I could find is in French in case anyone here speaks that: https://issuu.com/pierre-stemmelin/docs/guide_casques_2017/88

    The V2+ version has a ESS9018 so we can go ahead and ignore that.
     
  2. trl

    trl Acquaintance

    Joined:
    Apr 23, 2017
    Likes Received:
    28
    Dislikes Received:
    9
    Trophy Points:
    18
    Location:
    Iasi, Romania
    Hello,

    Just purchased a V2 few days ago and from my "domestic" RMAA and ARTA tests I got the below results:

    Frequency response (20-200000 Hz): +0.09, -0.01 dB
    Channel imbalance: ~0.1 dB
    THD: 0.007%
    Noise (A-weighted): -100 dB
    Dynamic range: 100 dB
    IMD + noise (A-weighted): 0.006%
    Crosstalk (left/right) @ 100 Hz: -85.3/-95.3 dB
    Crosstalk (left/right) @ 1 KHz: -88.8/-88.1 dB
    Crosstalk (left/right) @ 10 KHz: -69.0/-68.3 dB
    Mains hum: lower than -106 dB (50 Hz, 150 Hz, 250 Hz and 300 Hz are the only ones visible, but all are inaudible)

    Unfortunately I can't upload any pics here and I'm not willing to use Imgur and last pics I've used from my Google Drive and Google Image account couldn't be seen by some fox, so...I'm providing only text-based results for now.

    For a 2 x 8.2 Watts (11.5 V RMS/ch.) headamp with two shielded toroidal transformers inside (one for analog and the other one for digital) I find the above figures as being very good.

    Also, for a pure Class-A headamp the temps after >4h of continuous operation with HE-560 planars were not exceeding 30C on top (~22C room temp.). The low operating temperature is due to the 7 Kg weight, most of this mass being the aluminum base and case (6mm thickness).

    Worth mentioning there are no opamps inside, all discrete in there, and no caps in signal path. Also, power regulators are 2 x IRF610 MOSFET's that are taking care of the 2 x 24VAC coming from one transformer. Ripple is settled down with 4 x 8200/35V ELNA caps.
     
    slankoe and Jerry like this.
  3. Greg Brown

    Greg Brown Rando

    Joined:
    Oct 29, 2018
    Likes Received:
    3
    Dislikes Received:
    0
    Trophy Points:
    3
    Location:
    Spokane, WA
    I bought a V+ and only put a couple of days on it, and now I'm gonna eBay it. It was just underwhelming, at least to me. Its large and I didn't want to commit the space to it on my desk. Now that I'm a Gungnir Multibit user its even further down my list of keepers......
     
    slankoe likes this.
  4. trl

    trl Acquaintance

    Joined:
    Apr 23, 2017
    Likes Received:
    28
    Dislikes Received:
    9
    Trophy Points:
    18
    Location:
    Iasi, Romania
    It's big, indeed, and it also has 7 Kg of aluminium, transformers and components inside. I kinda like its weight and size, although on pair with its output power too.

    Too bad you're selling it because it's oversized. Have you tried placing your Gungnir above the V+? Or will it look like an airplane, Gungnir having it's width longer? :)
     
  5. Greg Brown

    Greg Brown Rando

    Joined:
    Oct 29, 2018
    Likes Received:
    3
    Dislikes Received:
    0
    Trophy Points:
    3
    Location:
    Spokane, WA
    I bought the Gungnir Multibit after it, and the Gungnir Multibit is my everyday rig. The V+ hasn't been taken out of its box for at least six months, and for me its simply time to move on. I do like the idea of an airplane......
     
  6. Kattefjaes

    Kattefjaes Mostly Harmless

    Friend
    Joined:
    Sep 5, 2016
    Likes Received:
    4,829
    Dislikes Received:
    41
    Trophy Points:
    113
    Location:
    London, UK
    The product page boasts:

    "The entire circuitry has been redesigned based on our new V6 SS opamp which is the best sounding audio opamp in the world."

    I'm confused.
     
    Last edited: Nov 10, 2018
    Thad E Ginathom likes this.
  7. Collusion

    Collusion Acquaintance

    Joined:
    Jul 27, 2017
    Likes Received:
    89
    Dislikes Received:
    2
    Trophy Points:
    18
    Location:
    Finland
    I had one not that long ago. The V2 model, without the optional DAC. I used it with Hifiman Sundaras and AKG K702's alongside with Genelec 8030b active monitors. Source was either a Modi MB (older gen) or an Yggdrasil A2.

    Mildly warmish sound. OK dynamics all-around. Sometimes I got a sensation it might add a tad of graininess into the mix ( especially when using it as a preamp ), but this extra ingredent was not introduced in alarming quantities. Bass reproduction was solid with some heft. I think the Conductor V2 was more balanced frequency balance wise than say, a Jotunheim. Maybe slightly more transparent too. Darker overall balance and maybe a tiny bit of warmth without Jotunheim's treble glare.

    However, compared against an SPL Phonitor 2 it was clearly inferior in almost every way. For such a small price difference I wouldn't hesitate to skip this and choose the SPL.
     
    Thad E Ginathom and Baten like this.
  8. purr1n

    purr1n Finding his inner redneck

    Staff Member Friend
    Joined:
    Sep 24, 2015
    Likes Received:
    37,942
    Dislikes Received:
    59
    Trophy Points:
    113
    Location:
    Calabasas, CA
    For the measurements above, particularly THD and IMD, at what power into what load for those figures?

    Burson is known for making discrete opamps. It's kind of dumb because a simpler circuit can probably take the opamps' place, but kind of cool because you can roll opamps like tubes, and listen to opamps instead of music.
     
    Last edited: Nov 10, 2018
  9. trl

    trl Acquaintance

    Joined:
    Apr 23, 2017
    Likes Received:
    28
    Dislikes Received:
    9
    Trophy Points:
    18
    Location:
    Iasi, Romania
    SS states from Solid-State, this is not an opamp, there're 2 small PCBs inside with SMD components: apparently perfectly matched transistors and 1% tolerance resistors. I actually like these V6 a lot when used in voltage-gain stage, but their moderate to high output DC (could get up to +/-10mV when cold, but getting lower when warm enough after few minutes from power-on) might not make them suitable for DAC output buffers unless there's DC-servo or output caps.

    However, for the external Input sources there are couple of opamps in the signal path: the ones from inside the PGA2310; the digital volume chip has a couple of opamps inside to adjust the gain. From -95.5dB up to 0dB I can't hear any additional noise increasing (with 8-Ohms IEMs there's a constant and very small amount of hiss, but totally not disturbing), but going higher than 0dB makes some noise coming out of my IEM's; tested with >100dB sensitive 8-Ohms IEM's, inputs shorted. Though, not sure how relevant this "IEM's test" would be, given the fact that nobody should actually listed to 100mW IEM's connected to a 9W amplifier (that's the max. power I got out of V2 while connected to my 8-Ohms Pioneer speakers, just before starting to clip on my scope).

    For RMAA I used resistive divider and 5V RMS headphones-out. Besides it's 3rd harmonic @ around -86dB which I'm not quite in love with, everything else seems about perfect (below -90dB with 0dB input). On my scope even the square-waves were about perfect up to 40-50KHz (at least at 20KHz phase-shift is barely invisible when zooming-in and at 20Hz phase-shift is non-existent, given the fact that V2 is DC-coupled.
     
    Last edited: Nov 11, 2018
  10. Kattefjaes

    Kattefjaes Mostly Harmless

    Friend
    Joined:
    Sep 5, 2016
    Likes Received:
    4,829
    Dislikes Received:
    41
    Trophy Points:
    113
    Location:
    London, UK
    Yeah, I've seen some of the opamp jerking-off. I ended up with an unfairly terrible stereotype of the Burson owner as a result.
     

Share This Page