Tried a JCM900 Reissue ,........sounded better or my imagination ?

Discussion in 'Marshall Amps' started by Kelia, Oct 17, 2020.

  1. Kelia

    Kelia Well-Known Member

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    Hey guys,......I tried a mint 2008 JCM900 DR reissue yesterday at my friends house
    and the amp sounded very good compared to the 1990 I had ,...it had a nice gain
    with great punch and lots of bottom end ,...did Marshall fixed the lack of bass in this amp or because the caps are newer the amp sounds better ?...It has a quad of Tung Sol 6L6's.

    Also ,...someone was saying that the Dual reverb is all tube from 0 to 10 gain wise
    and SS from 11 to 20 ,.........is it how it works ?

    Oh ,as a side note ,..he bought the amp from a Studio but all four of the chassis screws are missing, anyone knows of a good source to get those ?...........tx
     
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  2. Marshall Boogie

    Marshall Boogie Well-Known Member

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    0-10 is the clean channel and yes it is without diodes. 11-20 is the dirty channel and that has diodes (look close it is how that amp has the channels numbered), you don't get to run the gain 1-20 without switching channels.
     
  3. Marshall Boogie

    Marshall Boogie Well-Known Member

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    and to call that solid state is underserving the amp....the diodes kick the tubes in the teeth....the gain is still all tube(change tubes and you can tell the gain changes)
     
  4. Kelia

    Kelia Well-Known Member

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    Thanks !............I tell you ,it sounded better than the one I had a few years back
    before I did the Gravenmade 900 mod.
     
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  5. Gutch220

    Gutch220 Well-Known Member

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    Here are some bolts: https://www.amprepairparts.com/marshallhardware.htm (Part MCB-4 halfway down page)
     
  6. Kutt

    Kutt Well-Known Member Gold Supporting Member

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    Congrats man. I can't speak to the original 1990's versions, but I too snagged a reissue recently. It's a 2015. Dead nuts mint. I put a quad of 6L6's in it. An EQ in the loop does give it some extra teeth but it holds well on its own. They want to be played loudly.

    Here's mine out of the cab getting ready to retube/bias. You might be hearing more low end because of the 6L6's, assuming the older one you're thinking of had EL34's.

    upload_2020-10-17_12-18-38.png
     
    Last edited: Oct 18, 2020
  7. Kelia

    Kelia Well-Known Member

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  8. Kelia

    Kelia Well-Known Member

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    Nice !!.............well I'm sure I'm not dreaming ,..the one I've tried yesterday
    was better and fatter sounding than my stock 1990 .
     
    Last edited: Oct 17, 2020
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  9. LPMarshall hack

    LPMarshall hack Well-Known Member

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    This has got to be a mistake. The internet clearly states all 900s are total garbage.

    are you sure you don’t have a DSL?
     
  10. Kelia

    Kelia Well-Known Member

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    Haha!!.................that's good !
     
  11. Gutch220

    Gutch220 Well-Known Member

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    So I guess the latest reissues came with 6L6's?
    Don't forget the bias adjustment, and speakers will have a large affect on tone no matter what knobs you turn on the amp itself. I don't think I'm telling you something new.
     
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  12. Tonz

    Tonz Member

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    Well, this post was perfect timing. I was going to post and ask if anyone has tried or bought the JCM900 reissue. My local GC has an older JCM900 and I am really digging the amp and wouldn't mind adding one to the stable at some point (as well as a few other Marshalls - these things are very addicting \m/ ) I wanted to know how the build quality was as well as the effects loop? Is it worth the extra money over the original series?
     
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  13. K2JLX

    K2JLX Well-Known Member Gold Supporting Member

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    I have a 2016 reissue with Marshall branded ‘5881’ tubes in it (they appear to be TAD 6L6WGC-STRs upon closer examination however).

    In any event the amplifier rips, esp as other posters have mentioned; putting an eq in the loop and adjusting the loop level properly.

    Built like a brick shit house, quality and wiring is excellent and what one would expect for the price they ask.
     
  14. Kelia

    Kelia Well-Known Member

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    Haven't tried the effects loop on the reissue so maybe someone could chime in on this !
     
  15. Kelia

    Kelia Well-Known Member

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    Those 6L6GC are exactly whats in the amp I've tried,.....think I saw Tung Sol iirc
     
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  16. Sg-ocaster

    Sg-ocaster Well-Known Member

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    From my understanding....read the schematic along time ago when I repaired one....and my memory sucks lol......but.....im pretty sure. On the 900 DR the guitar goes in hits SS for both clean and dirty and then into v1a which is the only tube gain stage then v1b which is the CF stage V2 is reverb send/recovery and v3 the PI then Power tubes.
    SS input stage or not,my freinds 2x12 50w el34 jcm900 DR sounds really good.....i put a vintage mullard ecc83 in v1 groove tubes ecc83s in v2 and tele flatplate ecc83 in v3 with groove el34m Power tubes and biased it up. I think they sound nice.
     
    Last edited: Oct 18, 2020
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  17. Kutt

    Kutt Well-Known Member Gold Supporting Member

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    They ship with 5881's. But as you may know 6L6's can be used in place with zero modifications. Only a routine rebias would be needed.
     
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  18. Kutt

    Kutt Well-Known Member Gold Supporting Member

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    The loop on my 2015 reissue is solid. No volume drop or other coloration that I can hear.

    As far as the value, my logic is this- I got mine used and dead mint. It may have been priced a tad higher than what a used 1990's model would have been, though I'm not sure because I haven't seen a museum piece 90s head these days. Thing is I don't have to be concerned with 30 year old wear n' tear maintenance costs. For me it was a no brainer to get a reissue.

    Here is a gut shot of mine. I haven't seen the guts of an original so I wouldn't be able to compare and contrast. On a side note, it has a physical reverb tank just like the originals. No cutting corners with weakass digital.

    upload_2020-10-18_6-28-20.png
     
  19. Tonz

    Tonz Member

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    Kurt, Thanks for the Info. Its good to hear the quality is there, which is probably worth the higher price. I'm not sure there would be enough interest but a Studio/Mini JCM900 head/combo would be pretty cool, might as well throw in a Studio JVM while I'm at it. lol
     
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  20. Kelia

    Kelia Well-Known Member

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    My friend got the reissue for the same price of a 1990 and it sounds great with
    lots of bottom end and also tight !
     
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