+ Reply to Thread
Page 1 of 2 12 LastLast
Results 1 to 10 of 17

Thread: Advice on Passive Pre-amp

  1. #1
    Join Date: May 2014

    Location: Solihull

    Posts: 474
    I'm Martin.

    Default Advice on Passive Pre-amp

    Hi all. I thought I would try a passive pre as my TT does not get any use.
    Totally puzzled on how I determine the log value needed
    Any ideas??
    Tangerine LP12,Naim Aro, Benz Wood
    Audiomeca Talisman Highly Modded
    Audiomeca Kreatura &,SW1X DAC1
    Hovland HP100 MC
    SiriuS D100
    Quad FM4,RWA Cassabria + LCD 3
    Wilson Benesch Actors
    Cables by Cardas, Hovland G3 and Yter

  2. #2
    Join Date: Oct 2012

    Location: The Black Country

    Posts: 4,775
    I'm Alan.

    Default

    SS amps generally have lower input impedances, perhaps 22K or 10K on some.

    Valve amps generally have higher input impedances, perhaps 100K or even going as high as 1M.

    I usually opt for something in the middle that will work with either, so 50K for me.

  3. #3
    Join Date: May 2014

    Location: Solihull

    Posts: 474
    I'm Martin.

    Default

    Thanks Alan, the Sirius is 10k so it should be OK
    Tangerine LP12,Naim Aro, Benz Wood
    Audiomeca Talisman Highly Modded
    Audiomeca Kreatura &,SW1X DAC1
    Hovland HP100 MC
    SiriuS D100
    Quad FM4,RWA Cassabria + LCD 3
    Wilson Benesch Actors
    Cables by Cardas, Hovland G3 and Yter

  4. #4
    Join Date: Sep 2009

    Location: west mids, UK

    Posts: 2,171
    I'm Phil.

    Default

    I have the marvellous freya passive which seems excellent. Be happy to pop round one day and try in your system
    1]bel canto pre 3 vbs /MSB s200 , / onkyo sacd/ bel canto fm1
    sonos, . tannoy eaton legacy 2]schiit freya pre , firebottle mono`s marantz sa8005 bel canto 3.5vbss and RFC impulse ta`us , track audio stands 3] harbeth p3esr /rotel

  5. #5
    Join Date: May 2014

    Location: Solihull

    Posts: 474
    I'm Martin.

    Default

    Quote Originally Posted by hifinutt View Post
    I have the marvellous freya passive which seems excellent. Be happy to pop round one day and try in your system
    That sounds like a good idea. I have a Khozmo arriving at some time???? so would be ideal then
    Tangerine LP12,Naim Aro, Benz Wood
    Audiomeca Talisman Highly Modded
    Audiomeca Kreatura &,SW1X DAC1
    Hovland HP100 MC
    SiriuS D100
    Quad FM4,RWA Cassabria + LCD 3
    Wilson Benesch Actors
    Cables by Cardas, Hovland G3 and Yter

  6. #6
    Join Date: Sep 2009

    Location: west mids, UK

    Posts: 2,171
    I'm Phil.

    Default

    Excellent , nearly got a khozmo recently but not enough inputs . The freya has loads and several for too. Let me know when arrives and we can compare
    1]bel canto pre 3 vbs /MSB s200 , / onkyo sacd/ bel canto fm1
    sonos, . tannoy eaton legacy 2]schiit freya pre , firebottle mono`s marantz sa8005 bel canto 3.5vbss and RFC impulse ta`us , track audio stands 3] harbeth p3esr /rotel

  7. #7
    Join Date: Jul 2017

    Location: Kent

    Posts: 194
    I'm Paul.

    Default

    Quote Originally Posted by hifinutt View Post
    Excellent , nearly got a khozmo recently but not enough inputs . The freya has loads and several for too. Let me know when arrives and we can compare
    Phil, I'm having a BTE Designs preamp made up with a Khozmo stepped attenuator and you can have as many inputs and outputs as you wish.
    Current system:
    RPi + Allo Digione
    Beresford Caiman Seg & Dorado powered by 15v Linear PSU
    BTE Designs Passive Pre with Khozmo Stepped Attenuator
    Quad 306 upgraded
    Amptastic Mini-1
    Klipsch KG4.5 Speakers with Titanium Diagphrams and Sonicap Cap upgrade

    110aH Leisure Battery powers the Mini-1 & Digione

  8. #8
    Join Date: May 2008

    Location: A Strangely Isolated Place in Suffolk with far away trains passing by...

    Posts: 14,556
    I'm David.

    Default

    Please note that when passives work well, they're transparent to the source as long as the source output impedance is low and the amp input impedance fairly high, but some power amps don't like them and response errors and HUM can become an issue. Fancy attenuators tend to look and feel nice, but I'd check with a standard film pot first before shelling out hundreds on a posh Khozmo. It's not quite as cut-n-dried as it would seem and the pot value can make a difference to either source or the amp it's used with.
    Tear down these walls; Cut the ties that held me
    Crying out at the top of my voice; Tell me now if you can hear me

  9. #9
    Join Date: Jul 2017

    Location: Kent

    Posts: 194
    I'm Paul.

    Default

    Hi David, so if enjoyed the sound of my Tisbury Passive much more than a recent active tube preamp I acquired and quickly moved on I might not necessarily enjoy the sound from my new BTE preamp? I've given Mr Cresswell details of my source and power amp equipment and he seemed to think it would work nicely. I must say I will be mightily disappointed if it doesn't at least match the Tizzy. My guess is that it will or at least I hope it will.
    Current system:
    RPi + Allo Digione
    Beresford Caiman Seg & Dorado powered by 15v Linear PSU
    BTE Designs Passive Pre with Khozmo Stepped Attenuator
    Quad 306 upgraded
    Amptastic Mini-1
    Klipsch KG4.5 Speakers with Titanium Diagphrams and Sonicap Cap upgrade

    110aH Leisure Battery powers the Mini-1 & Digione

  10. #10
    Join Date: Sep 2009

    Location: west mids, UK

    Posts: 2,171
    I'm Phil.

    Default

    Thanks for those salient bits of advice . Not had passive amps for some years while using modwright. However rather attracted by the freya as has valve and passive options . There is not huge differences but the passive is deadly silent and valve stage occassionaly gives a small bit of hiss or noise depending on which system I am using it in
    1]bel canto pre 3 vbs /MSB s200 , / onkyo sacd/ bel canto fm1
    sonos, . tannoy eaton legacy 2]schiit freya pre , firebottle mono`s marantz sa8005 bel canto 3.5vbss and RFC impulse ta`us , track audio stands 3] harbeth p3esr /rotel

+ Reply to Thread
Page 1 of 2 12 LastLast



 

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •