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Bypassing active preamp in Ibanez GSR200?

bossfrog
Posts: 3
I've been playing for about 4 years now and I started off with an Ibanez GSR200 and, well… I still haven't found a reason to get rid of it yet. But the one thing I hate about it is the so-called “Phat II” boost knob. I just have never liked what it does to the sound. I call it the mud knob and I never, EVER use it. But I still have to keep a live battery in it or it won't pass the signal from the pups at all. My question is this:

Does anyone know what I need to do to bypass that preamp so I don't have to worry about batteries anymore? I know my way around a schematic and soldering iron, but I'm not good at figuring these things out from scratch.
Sidsquishus
Posts: 1499
Eventually, you get a reply from Marko1960.

If not, send him a pm about this. Cheers.
Sidsquishus
Posts: 1499
Marko? Tech guy? Anybody home?
Marko1960
Posts: 2174
You need to use the Tech Guy search light like Batman has, then I can run into the nearest phone box and put my boxers on the outside of my trousers. Ok, I'd disconnect the wiring from the pre-amp and wire the bass as a basic series plan. Being active there will be four or five wires from each pup, you need to identify the live and ground for each pup, I'm not too familiar with the Ibanez but I have a book of diagrams which I'll have to dig out and get back to you, I'll get back to you soon. “Who was that masked man?”
I was just at the Ibanez site and looked into this specific guitar (I think it's what I just got from a pawn shop - but it's at home and I'm at work)…

And it turns out it's *not* an active bass; the “Phat II” is actually an EQ, and the pickups are passive (which explains why I only had one co-axial wire from each p/u when I took it apart, insteda of the 4 or 5 marko mentioned.

Here's the URL: http://www.ibanez.co.jp/products/u_eb_page14.php?year=2014&cat_id=2&series_id=55&data_id=113&color=CL02

Since the pickups are passive, it might be possible to wire in a switch that will bypass the EQ entirely. I'll be looking into this possibility, myself, as I put mine back together.


Marko1960
Posts: 2174
A mini toggle switch between the pickups and the EQ should sort it
Uptates on this?

Anybody figure out how to bypass the pre-amp altogether? I seem to have some sort of weird short in my wiring. I only hear tone through the amp if i put my finger on the metal parts of the PhatII pre-amp… No idea what's wrong..

I wonder if i can simply remove the pre-amp and solder the wires together. Problem is I have no idea what I'm doing lol. Help would be appreciated.
Quote:
I was just at the Ibanez site and looked into this specific guitar (I think it's what I just got from a pawn shop - but it's at home and I'm at work)…And it turns out it's *not* an active bass; the “Phat II” is actually an EQ, and the pickups are passive (which explains why I only had one co-axial wire from each p/u when I took it apart, insteda of the 4 or 5 marko mentioned.Here's the URL: http://www.ibanez.co.jp/products/u_eb_page14.php?year=2014&cat_id=2&series_id=55&data_id=113&color=CL02Since the pickups are passive, it might be possible to wire in a switch that will bypass the EQ entirely. I'll be looking into this possibility, myself, as I put mine back together.


Mostly all pickups are passive. The thing that makes this bass active is the pre-amp and a requirement of the battery.
500k pot with push-pull switch from GuitarCenter, you don't need to drill any hole for switch. Drop the DiMarzio DP126 P+J set in the thing, never look back. DiMarzio website has schematics. Either use switch to bypass Phat and disconnect battery - or throw away phat PCB, and go wild & passive! How about controls like these: pickups balance - tone - mids tone( in the phat pot hole) - master volume? After all, It's all About That Bass ))
500k pot with push-pull switch from GuitarCenter, you don't need to drill any hole for switch. Drop the DiMarzio DP126 P+J set in the thing, never look back. DiMarzio website has schematics. Either use switch to bypass Phat and disconnect battery - or throw away phat PCB, and go wild & passive! How about controls like these: pickups balance - tone - mids tone( in the phat pot hole) - master volume? After all, It's all About That Bass ))
nap
Posts: 1
i got the same bass…how did you rewire it? please tell me.

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