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Thread: The Khozmo Mkii Stepped attenuator

  1. #61
    Join Date: Nov 2015

    Location: Wolverhampton

    Posts: 6,573
    I'm Oliver.

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    Quote Originally Posted by anthonyTD View Post
    DACT attenuators will fit in the Croft, I have used these in my own preamps over the years with excelent results.
    DACT are well liked. Good shout!

    Sent from my VKY-L09 using Tapatalk
    Analogue: Technics SP10 MK2 > Phonomac AT-1010 MK5 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. #62
    Join Date: May 2015

    Location: Greece

    Posts: 184
    I'm Panos.

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    Anthony,
    as you know Croft preamps use dual-mono pots, so I guess that DACT would offer something similar. Is there is a specific model that you would recommend? Is it a drop-in replacements to the existing TOCOS pots? Any idea about the cost perhaps?
    Thanks
    Panos
    System1: Roksan Xerxes original (HiFi Inspire plinth) with OriginLive DC motor + Audiomods Series5 + MusicMaker III, Marantz CD6005, LAB12 DAC1 SE+, Croft Micro25RSLS + Series7R monoblocks (110W/ea), Harbeth SHL5 Plus 40th Anniv., KEF LS50, LAB12 Gordian, Mark Grant HDX1, Black Cat Red Level Triode, LAB12 Knack MkII

    System 2: Marantz CD6003, Croft SuperMicroII ('R' spec by Croft, Tesla E83CC in phono)+ Series7, Snell Type EII (with bypass caps, new internal wiring, WBT nextgen 0703Cu), Mark Grant HDX1, Atlas Hyper 3.0

  3. #63
    Join Date: Nov 2015

    Location: Wolverhampton

    Posts: 6,573
    I'm Oliver.

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    Quote Originally Posted by pankon View Post
    Anthony,
    as you know Croft preamps use dual-mono pots, so I guess that DACT would offer something similar. Is there is a specific model that you would recommend? Is it a drop-in replacements to the existing TOCOS pots? Any idea about the cost perhaps?
    Thanks
    Panos
    You don't need dual pots, can fit a stereo pot and fill the hole of the now redundant hole with a blank.

    Sent from my VKY-L09 using Tapatalk
    Analogue: Technics SP10 MK2 > Phonomac AT-1010 MK5 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. #64
    Join Date: May 2015

    Location: Greece

    Posts: 184
    I'm Panos.

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    To be honest, the dual pots actually play the role of a balance pots. So I would not like to eliminate them and substitute them with a single stereo pots -))
    System1: Roksan Xerxes original (HiFi Inspire plinth) with OriginLive DC motor + Audiomods Series5 + MusicMaker III, Marantz CD6005, LAB12 DAC1 SE+, Croft Micro25RSLS + Series7R monoblocks (110W/ea), Harbeth SHL5 Plus 40th Anniv., KEF LS50, LAB12 Gordian, Mark Grant HDX1, Black Cat Red Level Triode, LAB12 Knack MkII

    System 2: Marantz CD6003, Croft SuperMicroII ('R' spec by Croft, Tesla E83CC in phono)+ Series7, Snell Type EII (with bypass caps, new internal wiring, WBT nextgen 0703Cu), Mark Grant HDX1, Atlas Hyper 3.0

  5. #65
    Join Date: Nov 2015

    Location: Wolverhampton

    Posts: 6,573
    I'm Oliver.

    Default

    Fair enough.
    Quote Originally Posted by pankon View Post
    To be honest, the dual pots actually play the role of a balance pots. So I would not like to eliminate them and substitute them with a single stereo pots -))
    Sent from my VKY-L09 using Tapatalk
    Analogue: Technics SP10 MK2 > Phonomac AT-1010 MK5 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

  6. #66
    Join Date: May 2017

    Location: West Sussex, UK

    Posts: 334
    I'm Steve.

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    Hi
    I also use the Khizmo 50k series pot in my dcb1 turbo and would concur with Oliver.
    The transparency and bass authority is by far the best I've heard.

    Steve..
    Project 2experience sb dc, Cart: At33ptg
    Firebottle Mono Blocks
    Monarchy Audio sm70
    Nelson Pass Dcb1 turbo preamp Khozmo series attenuator.
    CD Player: Cyrus cd8se
    Dynaudio Emit M20 + Pioneer CS88a Speakers
    Spotfire rca throughout - xt40 speaker cable.

  7. #67
    Join Date: Nov 2015

    Location: Wolverhampton

    Posts: 6,573
    I'm Oliver.

    Default

    I'd drop Glenn a message and ask him if he could help you out.
    Analogue: Technics SP10 MK2 > Phonomac AT-1010 MK5 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

  8. #68
    Join Date: Feb 2008

    Location: South Wales

    Posts: 6,905
    I'm NotTakingLifeTooSeriouslyTheseDays.

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    Hi Panos,
    You used to be able to get the mono versions, I will check, and let you know which ones to go for.
    A...
    Quote Originally Posted by pankon View Post
    Anthony,
    as you know Croft preamps use dual-mono pots, so I guess that DACT would offer something similar. Is there is a specific model that you would recommend? Is it a drop-in replacements to the existing TOCOS pots? Any idea about the cost perhaps?
    Thanks
    Panos
    "Today scientists have substituted mathematics for experiments, and they wander off through equation after equation, and eventually build a structure which has no relation to reality"
    Nikola Tesla


    When wireless is perfectly applied the whole earth will be converted into a huge brain, which in fact it is, all things being particles of a real and rhythmic whole... and the instruments through which we shall be able to do this will be amazingly simple compared with our present telephone. A man will be able to carry one in his vest pocket. Nikola Tesla, 1926
    We Send our kids to school to be Educated, not Medicated!

  9. #69
    Join Date: Feb 2008

    Location: South Wales

    Posts: 6,905
    I'm NotTakingLifeTooSeriouslyTheseDays.

    Default

    Here you go!
    http://dact.com/html/attenuators.html
    Hope this helps.
    A...
    "Today scientists have substituted mathematics for experiments, and they wander off through equation after equation, and eventually build a structure which has no relation to reality"
    Nikola Tesla


    When wireless is perfectly applied the whole earth will be converted into a huge brain, which in fact it is, all things being particles of a real and rhythmic whole... and the instruments through which we shall be able to do this will be amazingly simple compared with our present telephone. A man will be able to carry one in his vest pocket. Nikola Tesla, 1926
    We Send our kids to school to be Educated, not Medicated!

  10. #70
    Join Date: Jan 2013

    Location: Durham - UK

    Posts: 1,557
    I'm Ken.

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    I don't understand, why is no one recommending the Khozmo Ladder stepped attenuators?

    Is it just cost, they are 40 t0 50% more expensive than the Shunt or Series, as you need 96 resistors per channel, not 48/49.

    The problem with the Shunt has been explained, you have different impedance for every setting.

    For me the problem with the Series type, is just that, you have 48 resistors in series with the output seeing the number of resistors dictated by the rotary control position and the remaining number going to ground, the sum of the two equaling 48. At low volume there will be many resistors in series for the signal path, is this not a bad thing?

    Surely the Ladder type is the best, where you have pairs of resistors for each volume position, one for the signal and one (matched) to maintain impedance. There is only ever one resistor in the signal path and constant impedance is maintained across the controls range.

    The only difference is that the Series uses multiples of resistors for each value, the Ladder uses a single resistor.

    I would have thought the Ladder was the better choice?
    You still get +/- 0.1dB channel matching if you want a stereo version.

    So why not the Ladder?
    Ken

    http://www.jkwynn.co.uk/
    DIY Technics/Pro-Ject based Turntable + Terminator linear tracker + AT 33PTG II / AQVOX Phono 2 CI / PS Audio Stellar DAC-Pre / ESP Active X-Over / Nord MC500 Power Amps/ Modified semi-active Yamaha NS1000M Speakers / Stello CDT100 Transport.

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