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Post subject: Tbx mid boost not boosting help!
Posted: Mon Apr 14, 2014 10:41 am
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Ive installed the fender TBX mid boost to my squier/strat and I get sound, some tone, but no boost, and pickups have different levels when i use the 5 way, no buzzing, no humming, no weird noises, Ive checked grounds, and compared wires to the fender instructions, which leaves ALOT to be desired!! I found other diagrams but noting helpful..any ideas? Ive searched these forums and nothing pertaining to this problem, mostly other mods and problems..thanks in advance!


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Post subject: Re: Tbx mid boost not boosting help!
Posted: Mon Apr 14, 2014 11:48 am
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Is the TBX a mid boost? I have it on two guitars and I thought it helped shape the tone
when you rolled off the treble or some such thing, not really a boost as such.
TBX .. Treble bass expander.

... Al


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Post subject: Re: Tbx mid boost not boosting help!
Posted: Mon Apr 14, 2014 12:16 pm
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Yes it has the tone boost, tbx pot which does cut the mods or highs, and volume, volume doesn't seem to work from 1 to 10, just a slight increase from 4 to 10 or so, and the boost pot only increases on certain positions of the five way, and then not very much, it is actually louder in every way before this upgrade, wiring diagrams differs so much I was hoping to find a tried and true install of this. Thanks for your reply Al!


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Post subject: Re: Tbx mid boost not boosting help!
Posted: Mon Apr 14, 2014 12:17 pm
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TBX isn't a boost, it's a tone control and not very different to the stock tone control in that it is a passive device and doesn't boost anything. In fact all passive tone controls work by cutting frequencies.

Think about it, you can't boost a signal in any way without an amplifier. TBX controls don't have a battery. how's it going to boost anything without breaking the laws of physics?

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Post subject: Re: Tbx mid boost not boosting help!
Posted: Mon Apr 14, 2014 1:26 pm
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We must be talking about two different things, the TBX midboost, or clapton buddy guy midboost has a battery and supposed to boost output by 25db, while tbx tone pot controls which signal to cut, highs or mids, and has a circuit board attached as well. hence the no 25db boost, everything seems suppressed and about half the input to amp. I read about these and listened to videos of demostrations and it clearly boost the signal to amp and makes a nice breakup lower on the dial otherwise you would have to crank amp up to get the breakup. My biggest problem is not very clear wiring procedure from fender, and when done as per instructions, not working as advertised.


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Post subject: Re: Tbx mid boost not boosting help!
Posted: Mon Apr 14, 2014 2:55 pm
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fixed it by throwing away instructions


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Post subject: Re: Tbx mid boost not boosting help!
Posted: Mon Apr 14, 2014 6:09 pm
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It's always the instructions fault.

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Post subject: Re: Tbx mid boost not boosting help!
Posted: Mon Apr 14, 2014 7:59 pm
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GilgaFrank wrote:
TBX isn't a boost, it's a tone control and not very different to the stock tone control in that it is a passive device and doesn't boost anything. In fact all passive tone controls work by cutting frequencies.

Think about it, you can't boost a signal in any way without an amplifier. TBX controls don't have a battery. how's it going to boost anything without breaking the laws of physics?


+1

The mid boost control is called MDX which stands for MiDrange Xpansion. The MDX does require a battery in order to function properly.

Over the years a special bypass switch has been added on certain guitars in the form of a 2-way toggle or a push-push button to turn off the "Elite" preamp. In the case of the MIM Deluxe Roadhouse Fender opted for the S1 switch to bypass the circuit.

On the EC Strat this feature was shortlived as Eric prefers to remove the cable from his guitar rather than using a mid boost bypass switch.

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Post subject: Re: Tbx mid boost not boosting help!
Posted: Wed Apr 16, 2014 5:25 am
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This is an example of the Clapton Prototype which was demo'ed at the 1987 NAMM prior to the release of the model later that year. Note the 'mode' switch, between the TBX and MDX pots, which Chromeface alludes to. These guitars, including the now discontinued Powerhouse model, have bodies which are routed for a space in the lower bout area where the mother board for the MDX is housed. If you do not have components which include the pot, the board, the special jack, and battery connections, you do NOT have a midboost, but rather a TBX. If you'd like something similar, with a tad more simplicity, look at EMG's active SA's circuit, in particular, their Gilmour DG-20. You can drop the entire pre=wired pickguard into your guitar. It doesn't yield 25db as the Fender unit does but doesn't require a mother board either. You can also find variations on that theme for around $300 US at http://www.siglermusiconline.com [>guitars>guitar parts>920D custom pickguards] so as not be limited to a moto style, stock on the DG-20. You can install the required battery in the center of the trem cavity and just reset your spring arrangement. That will negate your having to remove the pickguard screws when a change out is indicated.

Yah!!! You ARE going to learn some interesting sxxt around here, aren't you. Welcome aboard :!: :wink:

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Post subject: Re: Tbx mid boost not boosting help!
Posted: Sat Apr 19, 2014 12:47 am
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EC had 2 of such guitars fitted with the mid boost bypass switch, the aforementioned Torino Red prototype and a final production Candy Green signature model (Lot #78) with the 25dB boost which was the last to sport that active/passive toggle. This Candy Green Strat was set up for slide (Motherless Children, The Spectrum, Philadelphia, PA 7/9/1988).

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Not to be confused with the Night Music Strat.



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