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Unplayable Fretless Bass

Welcome to TB. Truss rods are like braces on teeth: you don't see them moving, but they're still doing the job. Remember, the neck is made out of strong wood that has to slowly bend back into shape. Like Bill Whitehurst said in post #25, it may take a while. Be patient. Make sure you're loosening the rod and not tightening it thereby making the problem worse. Depending on these types of strings used the rod may need to be adjusted once anyway. Best to you.
 
It's not a crime to not know these adjustments, and we all had to start somewhere before we could effectively adjust our own instruments. I know, I turned mine into logs a few times. You're not there yet, so please take this to a real professional guitar tech IF it's a bass you'd like to own and play and can justify the cost, before you unwittingly add cost to the repairs . . . . . .
 
Thanks, Aidil and thank you for responding!

I just can't seem to get a decent enough picture at all, the one I've included is probably the best example I could capture. As you can see, the strings are right on the neck, there is absolutely no space between the neck and the strings. I've relieved the tension on the neck thinking that could possibly help, but it just doesn't seem to help at all.

Thanks again,
Zac

Turn the nut counterclockwise until the nut gets loose, it it won't get loose it may be cross threaded. If it's cross threaded the truss rod will not loosen and I would bring it to a pro. If that happened only from taking the old strings off and putting new ones one, the old strings must have been very high tension and the news ones must be very low tension. Nothing else makes sense of why that would happen unless you are turning the truss rod the wrong way, lefty loosy, righty tighty.
 
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I would re-examine the truss rod situation and make sure that it was indeed loosening. Mostly, it sounds like the nut slots are cut too deep and the bridge saddle set too low. Do you know if it was a conversion or originally made fretless? If it is a conversion, check to make sure the neck isn't over-shimmed.
 
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rise the action

I would re-examine the truss rod situation and make sure that it was indeed loosening. Mostly, it sounds like the nut slots are cut too deep and the bridge saddle set too low. Do you know if it was a conversion or originally made fretless? If it is a conversion, check to make sure the neck isn't over-shimmed.
Please read thoroughly before offering advice... the thread starter has already mentioned that the bridge saddles are already adjusted abnormally high. This is clearly a neck adjustment issue that could involve removing the neck in addition to a truss rod adjustment. Since it sounds like this player does not have great experience, it is much better for him to take it to a tech who can sort out the issue.
 
The truss acts as a counter to the tension of the strings which, if the t-rod was loose means that there is not enough string tension to pull the neck forward.

You can experiment first by tuning UP all the strings about two or three half steps to create more tension and pull the headstock forward. This may or not help but it’s an easy first attempt. If this helps, then higher tension strings can straighten it out.

Since your saddles or peaked, the next thing I’d try is shimming the neck (you can use a torn business card or piece of sandpaper). You will need one at the front of the neck pocket to tilt the entire neck towards the body thereby lifting the strings off of the fingerboard. You can actually just loosen the strings a bit, flip it over and unscrew all 4 screws a few turns but loosen the 2 screws closest to the headstock a bit more, enough to slip the shim in. Then, tighten all 4 down. You may also then have adjust your saddles down (which is a good thing).

Try those things and see where things end up.

Shiming the neck won't help. You do that when your saddles are too low to bring the action down. You shim the neck to raise the end of the neck so you have more adjustment on the saddles.
 
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Hi everyone! Thank you all much for the advice!
What I've done is string the bass with heavy gauge strings which seems to have improved the tension on the neck, also, by doing this, I was able to reduce the height of the saddles drastically. It's actually sounding pretty good, so I'm going to now learn all of Mick Karn's material haha. I really can't thank you all enough, I don't think I would have had the courage to try this stuff out without your responses. I'll be sure to visit this site more regularly!

Cheers and merry Christmas!
Zac
 
Hey!

Yes I have, but the saddles are pretty much as high as they can go, it looks freakish haha. I'm not too great at these things and it sort of stresses me out doing it myself honestly. Without sounding lazy, I think I'd rather someone with more experience to take a look at it. I'll take it to my local guitar shop and see what they can do

If the saddles are really high, check in the neck pocket to make sure as it hasn't been skimmed.
 
i think that neck has a 'single action' truss rod ... i'd install some heavy gauge strings , tune it up and let it sit for a bit ..

but it does sound like it might need a shim in the neck pocket ...

and i believe the fretboard is a resin compound ... not real wood , if that matters .?

If the saddles are high to clear the neck I'd suspect it is already being skimmed.

What could be the case, if the rod is stiff, or not moving, then it might need WD40, or it could have got cross-threaded. I'd suggest taking the nut off and then carefully putting it back on. I
 
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Please read thoroughly before offering advice... the thread starter has already mentioned that the bridge saddles are already adjusted abnormally high. This is clearly a neck adjustment issue that could involve removing the neck in addition to a truss rod adjustment. Since it sounds like this player does not have great experience, it is much better for him to take it to a tech who can sort out the issue.
Since the saddles are already too high this indicates that the neck has a shim on the heel toward the bridge end causing a neck tilt
 
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Since the saddles are already too high this indicates that the neck has a shim on the heel toward the bridge end causing a neck tilt
This could be the case, that's why I mentioned that the neck may need to come off... or it could be that the neck just has a terrible back-bow that may or may not be possible to solve with the truss rod.
 
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This could be the case, that's why I mentioned that the neck may need to come off... or it could be that the neck just has a terrible back-bow that may or may not be possible to solve with the truss rod.
look at the posted pic, the action is low, too low for "Fully raised saddles" (reposted below)
bass-neck-jpg.jpg