Saturday, February 22, 2025

31 thoughts on “How a Fender TBX tone control works on bass

  • Hi Oliver, I’m currently trying to get the TBX to work with a bass I’ve got, sterling intro series stingray, and I’ve changed the resistor to a 180k and 47NF capacitor – but the bass part of the TBX doesn’t work at all. Only the high end seems to work. Have you encountered this before where the darkening part doesn’t work?

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  • @asd7026
    1 minute ago
    I am sorry, i am a beginer on playing bass. I try P Bass last time. I wanna ask, is it the tone pot/knob work only full volume? Or I just can find the different?

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  • This is a very intelligent Video…sometimes little changes in small components can save big money in searching for new bass, just get the best from what you get … very well done mate.

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  • Great video, I'm customizing a TBX tone, I would like to hear more difference in tone between the capacitor part and the resistor part. Wich resistor value do you recommend? Note that in my 1988 Fender Jazz Bass Special a resistor of 4.7nF was also put together with the tone capacitor…I don't know why

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  • Excellent content! Congratulations!
    Do you know the value of the capacitor and resistor that originally comes with the models below?

    Fender Jazz Bass Special (80's made in Japan)
    Duff Signature (made in Mexico)
    Duff Signature Deluxe (made in Mexico)
    Fender Jazz Bass Special Reissue (made in Japan)

    Another question I have is whether the TBX kit that Fender currently sells for guitars can be used on a bass? It is also 250K/1Meg pot.

    Greeting from Brazil

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  • I would have liked to see how the low notes respond to the resistor. Trying to tighten up the low end of a baritone guitar.

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  • The capacitor demo was probably the clearest explanation of how they actually affect the sound of the guitar. The resistor demonstration though I am not sure how it really changed anything.

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  • Hey man, can I ask for some help?
    So I've bought a tbx bc I wanna put it into my bass. We're talking seymour duncan quarter pound p/j. How do I hook it up when I got 2 volumes? As in one volume control per pickup, and I wanna use the tbx kinda as my only tone control? Mind explaining or showing me to a wiring diagram? Thanks

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  • Got one, wired it w/100K, and I have to be honest, I don't know what the TBX side is supposed to do. It doesn't cut bass much if that's what's supposed to happen…

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  • Are used this on my 79 Precision. I think I wired it correctly but when I turn the control clockwise past the center it adds 50% more volume and a little more treble. When I turn it counter clockwise past the center it seems to lose volume and bass.

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  • Hey Oliver can you help me install this damn thing there no proper instructions for installing to a single volume control.

    Thanks.

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  • Sorry for the question a bit OT but where i can find the small size japan pot tbx for power jp bass circuitry ? Have a nice day and good music all fo you

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  • Thanks for the great video. My '85 Fender bass TBX does not respond after about half way up, it doesn't get too bright after that. My other '85, same bass, does go up all the way and gets very bright. What could be the issue? Thanks.

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  • I have a 1985 Jazz Bass Special with the tbx. I also have a 95 Strat with it too. I actually like it a lot. But on the bass, I just leave it in the detent, in the middle. I notice the high frequency filtering a little, but I just use it as is. I don’t understand the stuff you are describing about the electrical, but I enjoyed watching the video.

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  • Does the TBX control knob have a notch to let you know when you are at "flat" or the 12 o'clock position? Specifically curious about the knob on the Duff bass. I have also heard that the knob on the Duff bass would have clicks when you turn the knob clockwise from playing position, past the 12 oclock point. So basically when you are in the 1meg side of the pot you get a click at 1, 2 , 3 4, ect positions. Can you confirm any of this on the TBX pot on the fender duff bass? Thank you for the great video

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  • Thanks for the information this is a great device for passive Bass players. But does it need different capacitor for different pickups (P, J, MM)?
    Please do a longer demo with the capacitor you usually use.

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  • You my friend are amazing!! I never thought how important a tone resister is .. Fantastic! Now i must go on my journey to find my tone! Thanks

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  • Thanks, exactly what I was looking for. I am using a Single Q-Tuner Neodymium pickup on a 5 string music man clone ('Italian' MiC Eko MM-305). Does the capacitor or resistor need to be varied due to impedance of the pickup? Appreciate your input. Cracking open the guitar all the time is causing me some stress! I like the bass and don't want to ruin it.

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