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Thread: DCB1 TURBO BUILD @600Ma

  1. #181
    Join Date: Nov 2015

    Location: Wolverhampton

    Posts: 7,118
    I'm Oliver.

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    Quote Originally Posted by JohnJo View Post
    He should wrap it up and tell you you're not allowed to open it until Christmas morning
    Don't give him ideas!!!
    Analogue: Technics SP10 MK2 > Phonomac AT-1010 MK6 tonearm > Ortofon Kontrapunkt b > Bigbottle Jfet MC Valve Phonostage (Telefunken Valves)
    Digital: NONE
    Amplification: Nelson Pass DCB1 with Khozmo 48 Step Series Attenuator & Krell KSA100 MK2 Amplifier
    Cables: Fisual S-Flex Speaker Cable & SPOTFIRE IC Cables & NEW SPOTFIRE Tonearm cable
    Speakers: Pioneer CS-77A

  2. #182
    Join Date: Sep 2012

    Location: Newcastle-upon-Tyne

    Posts: 40
    I'm Keith.

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    Mine has been running with 10 ohm resistors so I think about 200ish ma output while i wait for 100 va traffo and 1.4R ish resistors to get to 600 ish ma output. In the meantime for the last 10days i have been swapping volume controllers. Started with a DACT which was very hifi, detailed, clean, open but ultimately sterile and too hifi with an emphasis on the leading edge. Khozmo shunt was tonally better and more balanced between leading edge and decay but a bit flat and uninvolving. Acoustic Dimension was detailed and open with good balance between leading edge and decay but much more involving. Have tried apps black beauty, tkd 2511 and noble (large black pot) and while they are nice i prefer the stepped attenuator clarity. The Acoustic Dimension seems to hit the spot for me so far.
    KR
    Keith
    Garrard 401, Groovemaster 2, Arche headshell, Miyajima Shilabe, Paradise Phono amp,
    Aqua La Voce dac
    Salas DCB1
    Najda active crossover and DSP.
    Crown XLi 1500 x 2 bridged, Neurochrome Mod 86 monos, Guy Sergeant Hiraga Le Monstre,
    DIY open baffle with 18" Fane Colossus XB, Beyma 12p80ND and Beyma TPL150H with BK XLS 400 sub.

  3. #183
    Join Date: Nov 2015

    Location: Wolverhampton

    Posts: 7,118
    I'm Oliver.

    Default

    Quote Originally Posted by keith1962 View Post
    Mine has been running with 10 ohm resistors so I think about 200ish ma output while i wait for 100 va traffo and 1.4R ish resistors to get to 600 ish ma output. In the meantime for the last 10days i have been swapping volume controllers. Started with a DACT which was very hifi, detailed, clean, open but ultimately sterile and too hifi with an emphasis on the leading edge. Khozmo shunt was tonally better and more balanced between leading edge and decay but a bit flat and uninvolving. Acoustic Dimension was detailed and open with good balance between leading edge and decay but much more involving. Have tried apps black beauty, tkd 2511 and noble (large black pot) and while they are nice i prefer the stepped attenuator clarity. The Acoustic Dimension seems to hit the spot for me so far.
    KR
    Keith
    Very interesting, Keith. I'll be hearing the ADSA tomorrow and am looking forward to it. Unfortunately it won't be in the DCB1 for a direct comparison.

    I'm surprised you felt the Khozmo was uninvolving because that certainly isn't what I have felt using it. However, the Acoustic Dimensions could be something rather special which would explain your findings.

    I really am excited by this and knowing Alan's KIN as well as I do, this could be very interesting
    Analogue: Technics SP10 MK2 > Phonomac AT-1010 MK6 tonearm > Ortofon Kontrapunkt b > Bigbottle Jfet MC Valve Phonostage (Telefunken Valves)
    Digital: NONE
    Amplification: Nelson Pass DCB1 with Khozmo 48 Step Series Attenuator & Krell KSA100 MK2 Amplifier
    Cables: Fisual S-Flex Speaker Cable & SPOTFIRE IC Cables & NEW SPOTFIRE Tonearm cable
    Speakers: Pioneer CS-77A

  4. #184
    Join Date: May 2017

    Location: West Sussex, UK

    Posts: 476
    I'm Steve.

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    Quote Originally Posted by keith1962 View Post
    Mine has been running with 10 ohm resistors so I think about 200ish ma output while i wait for 100 va traffo and 1.4R ish resistors to get to 600 ish ma output. In the meantime for the last 10days i have been swapping volume controllers. Started with a DACT which was very hifi, detailed, clean, open but ultimately sterile and too hifi with an emphasis on the leading edge. Khozmo shunt was tonally better and more balanced between leading edge and decay but a bit flat and uninvolving. Acoustic Dimension was detailed and open with good balance between leading edge and decay but much more involving. Have tried apps black beauty, tkd 2511 and noble (large black pot) and while they are nice i prefer the stepped attenuator clarity. The Acoustic Dimension seems to hit the spot for me so far.
    KR
    Keith
    Hi Keith

    With the 10ohm resistors in place you would be lucky if you were pushing anything more than 150 to 160mA.
    I had 8.2ohm and was only at 180 to 190ish.
    I too have the urge to try the Acoustic Dimension but could never describe the Khozmo as ( a bit flat and uninvolving) I only ever found it to be utterly transparent.

    S.
    Project 2experience sb dc, Cart: At33ptg
    Firebottle Mono Blocks
    Nelson Pass Dcb1 turbo @ 750mA. Khozmo 50k series attenuator.
    CD Player: Cyrus cd8se
    Dynaudio Emit M20
    Spotfire rca throughout - xt40 speaker cable.

  5. #185
    Join Date: Sep 2012

    Location: Newcastle-upon-Tyne

    Posts: 40
    I'm Keith.

    Default

    Ah, should get a decent step up going to 600ish ma then.
    Remember with the attenuator the Khozmo is a shunt type with Amtrans resistors in the shunt position. The Dact was very impressive in that HiFi way, too much leading edge for me. The Khozmo was better with more realistic tone to me and the AD felt like there was more depth on top of that.
    I still have them so will put the Khozmo back in again. I think the shunt arrangement might be causing the difference.and the accepted wisdom does seem to be to go for ladder or series attenuator rather than shunt.
    KR
    Keith
    Garrard 401, Groovemaster 2, Arche headshell, Miyajima Shilabe, Paradise Phono amp,
    Aqua La Voce dac
    Salas DCB1
    Najda active crossover and DSP.
    Crown XLi 1500 x 2 bridged, Neurochrome Mod 86 monos, Guy Sergeant Hiraga Le Monstre,
    DIY open baffle with 18" Fane Colossus XB, Beyma 12p80ND and Beyma TPL150H with BK XLS 400 sub.

  6. #186
    Join Date: Nov 2015

    Location: Wolverhampton

    Posts: 7,118
    I'm Oliver.

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    Its done!!!

    Still waiting for the acrylic front panel which I believe is arriving today. Fingers crossed.
    Analogue: Technics SP10 MK2 > Phonomac AT-1010 MK6 tonearm > Ortofon Kontrapunkt b > Bigbottle Jfet MC Valve Phonostage (Telefunken Valves)
    Digital: NONE
    Amplification: Nelson Pass DCB1 with Khozmo 48 Step Series Attenuator & Krell KSA100 MK2 Amplifier
    Cables: Fisual S-Flex Speaker Cable & SPOTFIRE IC Cables & NEW SPOTFIRE Tonearm cable
    Speakers: Pioneer CS-77A

  7. #187
    Join Date: Jan 2014

    Location: london se6

    Posts: 309
    I'm AndyElectroNumpty.

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    Nice ! looks really good , especially with the devilishly fiery glow of hot muzak emanating from it!

    got my bits from teabag this week so am plotting my next moves for the xmas build

  8. #188
    Join Date: Nov 2015

    Location: Wolverhampton

    Posts: 7,118
    I'm Oliver.

    Default

    Quote Originally Posted by smangus View Post
    Nice ! looks really good , especially with the devilishly fiery glow of hot muzak emanating from it!

    got my bits from teabag this week so am plotting my next moves for the xmas build
    Thanks mate. I'm plotting on how to make it visible all the time. I need a slight rearrange of the kit.

    Sound wise, already it's surpassed my expectations. Just need the front panel to finish it off.
    Analogue: Technics SP10 MK2 > Phonomac AT-1010 MK6 tonearm > Ortofon Kontrapunkt b > Bigbottle Jfet MC Valve Phonostage (Telefunken Valves)
    Digital: NONE
    Amplification: Nelson Pass DCB1 with Khozmo 48 Step Series Attenuator & Krell KSA100 MK2 Amplifier
    Cables: Fisual S-Flex Speaker Cable & SPOTFIRE IC Cables & NEW SPOTFIRE Tonearm cable
    Speakers: Pioneer CS-77A

  9. #189
    Join Date: May 2017

    Location: West Sussex, UK

    Posts: 476
    I'm Steve.

    Default

    Hi Oliver
    I did say your gonna love the turbo dcb1
    Really glad your loving it

    Now on to my dual mono DCB1 build..

    Steve
    Project 2experience sb dc, Cart: At33ptg
    Firebottle Mono Blocks
    Nelson Pass Dcb1 turbo @ 750mA. Khozmo 50k series attenuator.
    CD Player: Cyrus cd8se
    Dynaudio Emit M20
    Spotfire rca throughout - xt40 speaker cable.

  10. #190
    Join Date: Nov 2015

    Location: Wolverhampton

    Posts: 7,118
    I'm Oliver.

    Default

    Quote Originally Posted by STD305M View Post
    Hi Oliver
    I did say your gonna love the turbo dcb1
    Really glad your loving it

    Now on to my dual mono DCB1 build..

    Steve
    You did mate. I knew it though. After the 50mA, 200mA versions, I thought it was blatantly obvious that it got better as the mA went up!

    What I didn't expect was just how much of an improvement each increment would be.

    The Audionote resistors are a marvel too. So much cleaner IMO.
    Analogue: Technics SP10 MK2 > Phonomac AT-1010 MK6 tonearm > Ortofon Kontrapunkt b > Bigbottle Jfet MC Valve Phonostage (Telefunken Valves)
    Digital: NONE
    Amplification: Nelson Pass DCB1 with Khozmo 48 Step Series Attenuator & Krell KSA100 MK2 Amplifier
    Cables: Fisual S-Flex Speaker Cable & SPOTFIRE IC Cables & NEW SPOTFIRE Tonearm cable
    Speakers: Pioneer CS-77A

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