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New Line Magnetic 508ia Integrated Amp

Discussion in 'Audio Hardware' started by GoldprintAudio, May 20, 2016.

  1. jmpsmash

    jmpsmash Forum Resident

    Location:
    Santa Clara, CA
    Since you are doing 805 tryout, try to get a pair of amperex 805 with the metal frame. For the few minutes that I had it running before one of them loss bias, they sounded quite good. I returned the bad one but not able to find matching one for the other.
     
    adamaley and thomaskong like this.
  2. thomaskong

    thomaskong Forum Resident

    Location:
    Washington State
    Amperex also have a house sound of round midrange.

    I enjoy Amperex 12au7 in Rogue Cronus Magnum II which is used to drive my Raal SR1a headphone.

    Amperex 6sn7 sound rather dull despite nice midrange.

    Thus Amperex 805 may also sound dull in my system.

    After trying National Union, I may give tryout of Amperex 805 if it is available in good condition.
     
    Last edited: Nov 21, 2020
  3. thomaskong

    thomaskong Forum Resident

    Location:
    Washington State
    Melz 1578 made in 72 (6sn7) and Acme 300b stays in my LM 508 all the time.

    It is hard to bump them in my system.

    But I take turns on 6sl7 tubes depending on 805 to be used.

    Brimar or Mullard ECC35 work well with RCA 805 made in 60's.

    Russian 6n9s or RCA 5691 work well with Acme 805, United 805 and RCA vt 143 made in 1943.
     
    Last edited: Nov 21, 2020
  4. Strat-Mangler

    Strat-Mangler Personal Survival Daily Record-Breaker

    Location:
    Toronto
    What's the logic for that? Only thing I could think of would be that fewer vibrations would benefit the tubes themselves but then again, there are tube dampeners which can be purchased and accomplish that feat.
     
  5. adamaley

    adamaley Forum Resident

    I'm also expecting an Amperex 805 pair tomorrow, which I believe is a rebranded National Union (I may be wrong here). All the same, it'll be another datapoint for the group.
     
  6. adamaley

    adamaley Forum Resident

    Both internal and external vibrations impact the sound. Getting rid of them improved imaging and presentation of detail and clarity in my system. It's definitely worth experimenting before settling on a solution. I had a Sistrum Apprentice platform initially underneath my amp but it sucked out my midrange. Moving to the Isoacoustics brought benefits without downsides. I combined the Sistrum with the Oreas as seen in the image below, but eventually preferred the sound with just the Isoacoustics Orea Bordeauxs.

     
    thomaskong likes this.
  7. adamaley

    adamaley Forum Resident

    I have a set of three Isoacoustics Orea Bordeauxs that I don't use. I can send them to whomever is willing to pay for shipping to try them out for a couple of weeks or so. If other members want to ascertain whether it's useful in their system we can have them travel around.

    I preferred using three rather than four under my amp. One in front and two in the back, but of course, experimentation is in order.
     
  8. Chris Amott

    Chris Amott Well-Known Member

    Location:
    PNW
    Mine are already on the way - they are returnable - otherwise I would have taken you up on your offer! Thanks.
     
  9. jmpsmash

    jmpsmash Forum Resident

    Location:
    Santa Clara, CA
    Followup on that post from September. I have been using a pair of Jupiter Copper between 6SL7 and 6SN7 and a pair of Miflex KCPU between 6SN7 and 300B. I actually acquired another pair of Jupiter but I ended up putting them in my DAC instead as it worked out really well there. Recently I made another capacitor purchase and I managed to swap out that pair of Jupiter from my DAC. So today I replaced the Miflex. These Jupiters are worth every penny. While the Miflex has great bass definition it sounded dark at the top, the Jupiter opened up the top end with great clarity without sacrificing much at the bottom end. Everything image better now and the tonal balance is better.

    As to compare to the Wavac. The Wavac is still better in detail. The 508IA with the Jupiter also can reproduce the same sound, but the Wavac reproduces it with smoothness and naturalness while the 508IA is a bit too aggressive and forceful, the excessive amount of dynamics makes the sound less real. I will try to tune some of the power supply capacitor to see if that can be fixed.

    So if anyone want to do some quick (but not cheap) upgrades, I highly recommend the Jupiter Copper.
     
    Last edited: Nov 22, 2020
  10. Strat-Mangler

    Strat-Mangler Personal Survival Daily Record-Breaker

    Location:
    Toronto
    Thanks for that! Which cap numbers would need to be replaced to perform the same mod and which specific caps would need to be bought?
     
    Pedro Guillemain likes this.
  11. Ontheone

    Ontheone Poorly Understood Member

    Location:
    Indianapolis
    I notice that Line Magnetic Australia really promotes use of the German ELROG 300B tubes (they make 3 types of 300B's) for highest performance. Has anyone here tried them?
     
  12. scotpagel

    scotpagel Forum Resident

    Location:
    Tucson, Az
    I'm buying this amp this spring. Been trying to find reviews or anything on it. So far nothing but sound test videos on youtube.
     
  13. Strat-Mangler

    Strat-Mangler Personal Survival Daily Record-Breaker

    Location:
    Toronto
    I'd love a pair as I've read they're terrific but the price is really high; about twice what I paid for my EML 300B-XLS.

    I believe @adamaley tried them.
     
    Ontheone likes this.
  14. AP1

    AP1 Well-Known Member

    Location:
    TX
    If you want to reduce vibrations, do NOT put amplifier on top shelf of your rack.
     
  15. jmpsmash

    jmpsmash Forum Resident

    Location:
    Santa Clara, CA
    C102 and C103. Replace with the following (you need 4 of them):

    Jupiter Copper 0.1uF - Jupiter Capacitor 0.1uF 600Vdc Copper Foil

    The caveat is that this cap need 200+ hours to burn in. I left mine in my DAC and ran it 24/7 for 1.5 weeks. If done in the 508IA, it will take months of music listening. or if you don't mind leaving 0.5kW running 24/7 for that long for burn in purpose only. It might end up burning a hole in the wallet too.
     
  16. Strat-Mangler

    Strat-Mangler Personal Survival Daily Record-Breaker

    Location:
    Toronto
    Here's his post.

    New Line Magnetic 508ia Integrated Amp
     
    Ontheone likes this.
  17. jmpsmash

    jmpsmash Forum Resident

    Location:
    Santa Clara, CA
    Over the weekend I did some more tuning. I removed one of the large Mundorf power cap that I had on before. I thought that the 22uF would be beneficial, it does make things dynamic but perhaps too much of a good thing. I replaced it with the small Miflex that I took out earlier and now the overall is smoother. There is enough dynamics without being too aggressive.

    I understand that Mundorf has good reputation, but I ended up removing more Mundorf cap than putting on. Perhaps they just don't agree with my ears.

    The amp is sounding really good now. I think soon I will be able to come with a complete upgrade recommendation list.
     
  18. Strat-Mangler

    Strat-Mangler Personal Survival Daily Record-Breaker

    Location:
    Toronto
    Can't wait for that detailed analysis and breakdown. :)
     
  19. jmpsmash

    jmpsmash Forum Resident

    Location:
    Santa Clara, CA
    lol. Don't expect any ground breaking research. It will mostly be consolidating what I have posted so far in this thread.
     
    Strat-Mangler likes this.

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