Jb in and too much bass

Jarrodpimentals

New member
I got a Jackson x Kelly kex and started swapping pickups. I started with a bareknuckle and it was ok but bassy, so I switched to a jb trembucker (I have a Floyd) and the guitar is still overly bassy, more so than with the bareknuckle. And I hate it. I even rewired it to be just 1 volume pot and the pick up. No switch. I tried different pots too, all 500k. I also played extensively with the pickup height. Nothing helps. People on Jackson forums assure me this guitar is very tight and not bassy at all, a little thin if anything. I have an epiphone explorer with burstbuckers that is tuned down a half step from this guitar and it sounds mid focused and tight, makes me happy. So if anyone has a guess as to what is happening or is my guitar just a dud and it’s soaking up all the tone into bass signal.
 
If you are thinking about another pickup swap, try the Full Shred. You can also look at the EQ on your amp or pedals, or try an EQ pedal. The JB isn't at all what I'd consider bassy, but some guitars have natural overbearing frequencies. My Music Man is like that...lots of mids no matter what. Are you sure your tone knob (if there is one) is wired correctly?
 
How does the guitar sound unplugged? Is it bassy as well?

I'd try a 1 Meg Pot.

Jacksons sometimes tend to have the bridge pickup further away from the bridge itself than many other brands. Even if it's a little, I find it makes a big difference. I used to have a 2000's DXMG that was unusably dark and blunt compared to my LTD's or Ibanez.
 
People on Jackson forums assure me this guitar is very tight and not bassy at all, a little thin if anything. I have an epiphone explorer with burstbuckers that is tuned down a half step from this guitar and it sounds mid focused and tight, makes me happy. So if anyone has a guess as to what is happening or is my guitar just a dud and it’s soaking up all the tone into bass signal.

As most powerful humbuckers, the JB is a high inductance pickup (in the 8 Henry range, while Burstbuckers are in the 4H range). High inductance gives more power but it also shifts down the resonant peak exhibited by any passive pickup, giving less treble and more bass/mids.

It gets worse if the guitar is played through some long and/or capacitive cable.

There are other solutions than increasing pot resistance. Mounting pickups with a lower inductance, of course. But also using a wiring with less capacitance, some buffer/preamp just at the output of the guitar, some capacitor in series with the JB, some dummy coil(s) in parallel with it...

Details on request. In the meantime, you might try the JB with its coils in parallel with each other rather than in series. its output will drop but it shouldn't sound bassy no more...


Food for thought:

1-link:
https://forum.seymourduncan.com/for...-changing-the-voicing-of-pickups…#post6244220
(The first pic of the first post, with a 500T vs the same pickup + and inductive filter, shows the same kind of difference than between a high inductance bridge humbucker and a lower inductance one. IOW, it's practically a picture of what you hear and complain about. See also the post 7 for similar comparisons)...

2-Below the frequency response of a same humbucker played in chords direct to the board through the low parasitic capacitance of a very short cable VS the high capacitance of a very long cable. Yes, the frequencies of a passive pickup are THAT flexible, just because of some factors most often overlooked... :-)
 
Last edited:
How does the guitar sound unplugged? Is it bassy as well?

I'd try a 1 Meg Pot.

Jacksons sometimes tend to have the bridge pickup further away from the bridge itself than many other brands. Even if it's a little, I find it makes a big difference. I used to have a 2000's DXMG that was unusably dark and blunt compared to my LTD's or Ibanez.

i think you nailed it. It sounds normal unplugged, and the pickup is 3/4” further from the bridge than my other explorer guitar. Now the question is do I just sell it or modify it.
 
A really bright pickup and 1meg pot as suggested above might counteract it, but unless you absolutely love the way it plays and feels, it's probably not worth the hassle.
 
I suppose that putting pickups far from the bridge is a way for Jackson to counteract the tone thinning effect of Floyd Rose units... but my acoustically thin sounding Superstrat with FR can still sound a bit too fat in the bass if I don't adapt my gain and EQ settings to its 16k/8H bridge pickup when I come from Gibson guitars, so I can see what is the problem here.

Now.... A while back, I've worked on a 1970 SG Deluxe whose bridge pickup was very far from the saddles. It sounded noticeably bassier than other guitars with the same bridge PU. But it was not TOO bassy: the onboard T-Top was just right there.

So I'd stand on the idea to try some HB with lower DCR / inductance or any other strategy allowing to have a higher pitched resonant frequency. Some guitars require almost extreme tinkering (I've worked recently on an Explorer whose acoustic resonance was bass heavy enough to need an underwound 6.6k neck humbucker with shortened screw poles)... Again, the JB in parallel might be something to try in this case. If it becomes too bright, it's always possible to put a low value capacitor between its hot and ground...
 
have you lowered the pup? as mentioned, the burstbucker and jb are very different pups
 
I got a Jackson x Kelly kex and started swapping pickups. I started with a bareknuckle and it was ok but bassy, so I switched to a jb trembucker (I have a Floyd) and the guitar is still overly bassy, more so than with the bareknuckle.

Which Bare Knuckle pickup was it? In dark guitars I've had great results with the Cold Sweat and Rebel Yell, less so with some more midrange-focused pickups like the Nailbomb, Warpig, Crawler, or Brute Force. Higher pot value or even wiring straight to the jack can sound great with the right guitar and pickup combo, too.
 
Back
Top