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Modulus TBX - Do they all not have truss rods?

Discussion in 'Basses [BG]' started by snogaws, Mar 1, 2011.

  1. snogaws


    Oct 25, 2008
    I bought a Modulus Q6 TBX on ebay today that doesn't have a truss rod in it. I know some models of the Quantums don't have truss rods and others do, but was wondering if this is true with TBX's as well, or do they all not have truss rods? I looked in the Modulus TBX photos thread and from what I could tell none of them had truss rods. can someone clarify if this is in fact true?

  2. I think the TBX basses were all Geoff Gould designs, if I am thinking of the neck-through basses. AFAIK none of Geoff's basses had truss rods, except for maybe the Genesis basses. You either have to like the neck relief or not like it. As far as stability goes, the necks without truss rods do not need them for stability. I haven't touched the adjustments on my 1992 Q5 in years.

    Rick B.
  3. Register_To_Disable

  4. ChrisPbass


    Jul 18, 2006
    Fairfax, VA
  5. Bassconbeatz

    Bassconbeatz Way down low Supporting Member

    Feb 5, 2004
    Porter Ranch, CA
  6. bassbenj


    Aug 11, 2009
    yes. My TBX 6 has no truss rod. Doesn't need it. Couldn't use it. that TBX neck is thick and heavy and strong. You could drive a UPS truck over it with no effect. Obviously the new modulus necks have to be thinner and more flexible even though graphite (We TBX owners call that "cheaper") so the relief can actually be changed. As someone noted the Truss rod necks were later. My TBX is so stable it hasn't had an adjustment in years and almost never even needs tuned. Playability in my humble opinion is nearly perfect as is...so there you go. I say "nearly" because the relief is just a tad less on the TBX than what I usually set my other basses to. But the slight difference has never given my any problems.
  7. Hoover

    Hoover Banned

    Nov 2, 2007
    New York City
    Right, the new reissue TBXs have a trussrod, the original TBXs did not.
  8. My 94 Q5 Sweetspot is a bolt on neck, no truss rod. It is currently at Modulus getting a new neck due to failure of the graphite. The new neck will have a truss. This makes me little wary of non truss models, however my bass is being repaired under warranty. So far Modulus have been pretty stand-up about it. It is just taking a long time to get it done. I have never heard of any problems with the TBX necks though.
  9. madbass6


    Jan 13, 2009
    I do not give consent to use any of my photos ! please respect that. thank you.
    I agree 100%! why mess with whats been working for years! no thrus rod! it wasnt meant to have one! and whats up with the new TBX? neckthru on back only! & yes, im a proud owner of a MODULUS TBX 6 cocobola top! very rare Beast! :rollno::bassist::bassist:all original! (93)
  10. coyoteboy

    coyoteboy easy there, Ned Supporting Member

    Mar 29, 2000
    Sactomato, CA
    Fwiw, you can now get a 19mm Q5. I'd get the 5 if only for the thumbrest.
  11. lang3735


    Mar 13, 2012
    Sydney Australia
    When I ordered my TBX5, I had the option of having exposed carbon fiber on the front, or book matched top. I chose the exposed carbon fiber as to me it defines the TBX look.
    After my dealings with Joe from Modulus, I doubt the addition of the truss rod would have been done lightly. There would have been good reasons for them to do that, and don't think for one minute anything would have been done that would negatively affect the performance of their basses.
  12. mp40smg


    Aug 11, 2010
    Worcester, Ma.
    I bought my nt6 in 91. No truss rods. No rods on any of the guitars and basses from that era. My impression, speaking to GG was pretty much a belt And suspenders argument. And after 20 years of owning it, I see no reason for rods either.
  13. lang3735


    Mar 13, 2012
    Sydney Australia
    Maybe the addition of a truss rod is to allow the player to choose other string gagues and/or tunings, rather than need to stick to a particular gague and/or standard tuning to maintain the correct neck relief. Just sayin'...
  14. bassbenj


    Aug 11, 2009
    Hardly! Those necks are so stiff you could put ANY strings on it or ANY tuning and you couldn't change it a fraction of a millimeter. It's not a matter of "correct" relief, but rather what relief the player prefers. To me they got it perfect, but there are probably those with different tastes. To me making a carbon fiber neck thinner and putting in a truss rod sort of perverts the whole idea of carbon fiber stability. Might as well go with wood. Sure I like that cold smooth feel of graphite, but that was NOT the idea for owning one. Stability was.
  15. lang3735


    Mar 13, 2012
    Sydney Australia
    I agree that stability is a good reason to own a Modulus, but the main reason is the tone.
    When I say "correct relief", I fully understand that everyone has the relief that they prefer. Keep reading and you will see what I mean.
    Much time was spent in the early days of carbon fiber necks, getting the design just right so when string tension was applied, the bass played within the "normal" parameters of average expected relief. They had to engineer the design to do that because there was no truss rod (needed or not) to adjust to fine tune the setup.
    I remember how years ago it was recomended to buy strings from Modulus direct for whatever model Modulus bass you owned as they were a known tension - the tension used to calculate the neck design - thus keeping the neck within the precalculated relief parameters. The only thing you could do to change the setup was to raise or lower the string saddles, or shim the neck.
    Changing tunings may not seem to change the neck relief, but if you look down the neck with no strings on, you will see a different curve when compared to fully strung and tuned.
    The channel needed for a truss rod is small. There wouldn't be much material left out to make room for one, and the truss adds its own stiffness inside the channel where the material has been left out.
    The necks are stiff, but there are Modulus necks that have bowed and been replaced by Modulus under warranty that are in the original non truss rod variety (and truss rod variety) so there is a certain amount of flex inherent in the original and current design.
  16. bassman10096


    Jul 30, 2004
    Not sure why he made the change himself, but Geoff's GG graphite basses all have trussrods. Not sure why he made the change, but I suspect enough people found the lack of a rod disconcerting to make it a reasonable accommodation.
  17. edwinhurwitz

    edwinhurwitz Supporting Member

    May 13, 2003
    Boulder, CO
    Endorsing Artist: DR Strings, SMS, D-TAR
    I have a 1991 Q6 and the neck changes quite a lot with different strings and gauges. It's just about perfect with a Sunbeam 30-120 set, but other strings can wreak havoc on my setup. They move quite a bit. TBX basses might be a different story.
  18. rockinrayduke

    rockinrayduke Supporting Member

    Dec 30, 2007
    Los Angeles, CA
    I use Prosteels 100-40 on this '91 TBX 4 string I have and there's a little bit of relief. My problem is the bridge is down as far as it will go on the D and G strings where I feel it needs to come down just a hair more. Afraid to try higher gauge strings, don't want to mess up the setup. Will higher gauge strings put more relief in a graphite neck?
  19. edwinhurwitz

    edwinhurwitz Supporting Member

    May 13, 2003
    Boulder, CO
    Endorsing Artist: DR Strings, SMS, D-TAR
    They should. Also you could try higher tension strings. I'm not sure of the Prosteels.
  20. madbass6


    Jan 13, 2009
    I do not give consent to use any of my photos ! please respect that. thank you.
    Hi all, its been a wile! proud to say im still the very proud owner of one of the last original Mods TBXs 6 produced back in 1993 ! and still no neck issues! I bought this beast Brand new the very same year it was produced (93) ive done numerous tours/recordings/ etc. ive gone back and fourth with different strings and gauges over the years as I play a variety styles of music! & till this day (2015) I have not had any neck issues ! there for as living proof I must stick to my original comment a few years back,.. why mess with whats been working for years! in other words, if it ant broken dont fix it! in my humble opinion, truss rods are not needed on Modulus graphite necks ! & no its not for sale or trade ! but then again, my mentor always told me never say never! will post better pics in the near future. :)

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  21. madbass6


    Jan 13, 2009
    I do not give consent to use any of my photos ! please respect that. thank you.
    ok, heres better pics. and 'NO' the Smith 6EG (7pc neck) is also not for sale or trade. but then again, never say never! not pictured are two fodera 5s

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