Official Jolida JD9 thread

Discussion in 'Turntables' started by helios660, Jan 13, 2011.

  1. helios660

    helios660 New Member

    Messages:
    49
    Location:
    Boston, MA
    Since the JD9 is considered by many as one of the best phono stages under $500 and is such a popular option among the budget minded and DIY/modders alike, I figured Id start one of these here in an attempt collect all the information we can gather on the Jolida JD9.

    Ill start by asking, what is your current JD9 setup?
    What tubes have you rolled?
    What have you found to be the best settings on the dip switches?
    and what are your overall impressions of the Jolida JD9?

    I attached the JD9 settings sheet which I have found very helpful.

    UPDATE:

    Quick reference:

    The 3 main upgrades included in this thread are(in order of sonic impact): caps, opamps, tubes

    While there are many variations in this thread, these seem to be the most popular:

    Caps: Obbligato Premium Film or Claritycaps 1.0uF / 630V
    [​IMG]
    Photo: Brett A

    Opamps: Burr-Brown / TI OPA627ap or OPA637ap in all positions
    [​IMG]
    Photo: Frank Sol

    Tubes: Remove covers - insert 12ax7 of your liking. Some have used 12au7's or 5751's for lower gain without issue.


    Invenio's awesome step-by-step guide:

    http://www.blu-ray.com/community/gallery.php?member=invenio&folderid=6855

    --

    If anyone would like me to add to the quick reference, let me know.
     

    Attached Files:

    • JD9.jpeg
      JD9.jpeg
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    Last edited: Jan 21, 2014
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  2. bsujeep

    bsujeep Go Boise State!!!

    Messages:
    1,484
    Location:
    Boise, ID
    Great idea for a thread,

    I have used two different MM carts and have found the following.

    V15 III w/Lpgear HE stylus

    68k resistance (all resistance switches to off and loading plugs).
    Both 150pF and 220pF switches on plus 100pF cables for a total of 470pF.
    All gain switches off.
    Hi output.

    AT-20SS

    47k resistance switch on.
    100pF capacitance on plus 100pF cables for a total of 200pF.
    All gain switches off.
    Hi output.

    For tubes I have rolled Telefunken's (Both types), Baldwin labeled Sylvania's, and the new Tung Sol's. The Tung Sol's won hands down for a smooth presentation from top to bottom.

    These settings on my system create a nice 3D soundstage, strong tight bass, and detail without fatigue.

    I love the ability to try different settings and turn off some to use loading plugs for values not available.

    Bill
     
    Last edited: Jan 13, 2011
  3. helios660

    helios660 New Member

    Messages:
    49
    Location:
    Boston, MA
    bump
     
    Last edited: Jan 16, 2011
  4. helios660

    helios660 New Member

    Messages:
    49
    Location:
    Boston, MA
    just put a pair of new sensor mullards in my JD9, they are not broken in yet, but WOW. they are silent compared to the jolida stock tubes. first impression i get is the highs are rolled off, although more impact. will update with more break in.

    current config is:
    1k resistance switch on
    100pF switch on
    all gain switches off
    Hi output
     
  5. Dr. Ear

    Dr. Ear Well-Known Member

    Messages:
    747
    Location:
    Austria
    Iinitially I did not like the Jolida that much, it sounded too bright to me. The brightness even got worse with Electro Harmonix Gold Pin tubes. I replaced all OP-amps with the best I could find, put Slovakian tubes from JJ in and replaced the output coupling caps with Claricaps. It sounds VERY good now.
     
  6. helios660

    helios660 New Member

    Messages:
    49
    Location:
    Boston, MA
    what are your settings? and what tubes did it come with? ive heard some ship with gold pin EH, whereas mine came with jolida branded generics.

    if you think your JD9 is too bright, the new sensor mullards are definitely a good option.
     

     

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  7. Dr. Ear

    Dr. Ear Well-Known Member

    Messages:
    747
    Location:
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    I'm still not sure which setting is better with my AT20SS Cartridge, 47 pF, low gain and low output or no gain and high output. I have
    OPA627 in the output stage and LT1128 for the rest. The JJ tubes sound very warm and smooth with good detail.
     
  8. Brett a

    Brett a ~◦●○o0o○●◦~ Subscriber

    Messages:
    10,607
    Location:
    Massachusetts-North Quabbin
    Excellent idea! Thanks for the thread.

    I run mine stock. It came with a pair of Electro Harmonix tubes that provide a larger, fuller sound than the Mullard reissues i tried for a while.

    The only thing special I've done with mine is take the hood off (yes, i run it nude) and removed the spring-loaded tube covers. Both in an effort to reduce resonance. I can get away with it b/c it's tucked under an MDF stand i threw together (see pic).

    I was running an AT150MLx when I bought mine, but soon after upgraded to an AT oc9 MLII LOMC.

    The phono stage it replaced was a Cambridge 640p.
     

    Attached Files:

  9. helios660

    helios660 New Member

    Messages:
    49
    Location:
    Boston, MA
    i have also removed the tube covers, made more of a difference than i thought it would.
     
  10. helios660

    helios660 New Member

    Messages:
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    Location:
    Boston, MA
    op-amps

    what op amps did you use, where did you get them, and does the jolida have IC sockets for easy switching? or did you have to solder it all?
     
  11. MuthaFunk

    MuthaFunk Vinyl Addict

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    Burlington, Ontario, Canada
    Last edited: Jan 18, 2011

     

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  12. braxus

    braxus FeCr Type III

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    Excellent thread. I'd like to get one of these units sometime in the next 6 months. I have someone here who deals with Jolida.
     
    Last edited: Jan 24, 2012
  13. helios660

    helios660 New Member

    Messages:
    49
    Location:
    Boston, MA
    would you mind going into more detail about replacing the op-amps? what it involves, and what are the differences you experienced by replacing them?
     
  14. Dr. Ear

    Dr. Ear Well-Known Member

    Messages:
    747
    Location:
    Austria
    The OPA627 (for the output stage, on the circuitry located on the left side when viewed from the front) is still considered as one of the best soundig op-amps, a bit on the expensive side. The sound is warm and detailed without any trace of brittleness or this forensic touch. The LT1115 or LT1128 are super low noise op-amps, you will hardly find quieter ones.
    With this combination the Jolida is dead quiet. Music appears from of a totally black background. Take the time and compare the datasheets of the different models for resudual noise.
    I cannot make an A\B comparison because I just have one JD9. All I can say is that with the original tubes and OPA37 I did not like the sound so much. It was too bright, not involving, with exaggerated sybiyllants and a lean bass. My Yamaha C4 sounded significantly better. After the modification now I prefer the Jolida to the C4.
    BTW, the opa's can easily be exchanged without soldering.
    Beware, there is a post in another forum where a guy recommends AD843 for all stages. DO NOT follow his advice! Instead of, I quote, "nasty levels of bass" you will get nasty levels of noise! The AD843 are only useable in the output section.
    Removing the covers of the tubes lets them run cooler, this may improve the sound with some tubes, e.g. the Electro Harmonix Gold which tend to sound brighter when hot.
     
  15. helios660

    helios660 New Member

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  16. Dr. Ear

    Dr. Ear Well-Known Member

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  17. bigdirty

    bigdirty High fidelity brah

    Messages:
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    Location:
    alberta
    Bump with some pics of my modified JD9.

    Im using AD843KN in the output, op627 in the middle and LT1028 in the right op sockets. Ampohm output caps. Tantalum resistors and silver mica in the loading board. Amtrans carbon film resistor in series with the valve input. Cree Silicon Carbide Schottky Diodes in the power supply.

    What fun :music:
     

    Attached Files:

  18. mhilton777

    mhilton777 Well-Known Member

    Messages:
    516
    Location:
    Rosemount, MN
    I just dot my JD9 yesterday and have been enjoying it. After break-in, I think I may try the mods.
     
  19. bigdirty

    bigdirty High fidelity brah

    Messages:
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    Location:
    alberta
    The loading board is the only really difficult work. with the right tools and some patience its possible.
     
  20. mhilton777

    mhilton777 Well-Known Member

    Messages:
    516
    Location:
    Rosemount, MN
    I am blown away at the Jolida's performance already compared to the phono stage in the Denon which was actually pretty decent. All of my vinyl listening experience done before this was on a complete Pioneer Spec setup which was unbelievable.

    Do you think the mods made a huge difference or just bring out some of the more subtle sounds?
     

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