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Boss GE-7 & GEB-7 Plus Mod Kits

Pedal Type

WARNING! — The OPA2134PA opamp, of which are included in many of my kits, is currently extremely hard to find. Mouser and Digikey are currently out of stock with none expected until 2023. I have hundreds in stock. BE CAREFUL BUYING THE OPA2134PA ON EBAY. THE MAJORITY ARE FAKE! Manufacturers in China are rebranding cheaper opamps and selling them as OPA2134PA opamps. I test all my OPA2134PA opamps I buy. You can easily test whether a OPA2134PA has been rebranded. Do this, take some Acetone on a Q-tip and rub across the lettering of the opamp. If it is Fake the ink used to print the labeling will dissolve into the Q-tip.

This is very handy tone shaping tool to have on your pedal board. This is actually a very nice sounding EQ right off the shelf. But it suffers from excessive noise as a result of the cheaper components Boss uses. With this mod we replace the cheaper noisy op-amp chips with low noise higher quality chips.

Lower quality capacitors are also replaced reducing noise even more and also adding a more focused Hi-Fi tone to the circuit. Noise is substantially reduced and the signal is passed through preserving the original tone of your guitar. The bypass circuit is also much improved. You will not find a better mod than this anywhere for the GE-7! You’ll be shocked at the improvement this mod will make on this pedal.

TESTIMONIAL — Modified my GE-7 with your “Plus” mod yesterday, and I am blown away by the results. I did before/after comparisons with a DAW and a spectrum analyzer so I could not only hear, but see the difference. Before: hiss, hum, buzz, noise on every slider. After: nearly silent operation – I had to boost the recorded waveform significantly just to hear it. All this plus tight, defined, *musical* equalization. Kudos to you once again. I am proud to have this join my Monte Allums CS-3 Opto Plus, which continues to amaze. Will recommend your mods every chance I get! Below is a screen shot of Jeff’s spectrum analyzer results of before and after the GE-7 Plus Mod (Click on the pic to enlarge). Also click here for a mp3 that Jeff made of before and after he performed the mod. Here’s Jeff’s description of the mp3:

 

1. All sliders at 0 (centered), gain at 0.
2. Each slider boosted fully one at a time, from low to high; gain at 0.
3. Each slider cut fully one at a time, from low to high; gain at 0. It is surprising here how much hiss and noise are added to the signal when *cutting* frequencies on the unmodded pedal.
4. Gain slider maxxed, each slider additively boosted fully from low to high.
5. Unmodded sound is on the left and the modded sound is on the right.


Jeff Watt
Sherwood Park Alberta, Canada

WARNING!
There are two GE-7s and GEB-7s Boss have made. The New Version GE-7 has 3 Opamps while the Older Vintage GE-7 and GEB-7 have 4 Opamps. You must open your pedal to see which kit you need to order. Use the Pull-Down Menu to select the correct kit for your GE-7 and GEB-7. The Vintage 4-opamp GE-7 PCB will look like this. The New 3-opamp GE-7 PCB will look like this. The mod will not work with the older GEB-7. Make sure your GEB-7 pcb looks exactly like this.As of 2020 Boss are making surface mount (SMT) versions in Malaysia. The SMT versions cannot be modded. So just make sure the version you have matches one of the two pcbs listed above.

About the New! GE-7 & GEB-7 Plus Mod Kits

This is exactly the same mod as my popular GE-7 & GEB-7 mod but with my new Dual Stacked Chip Adapter Mod with two Burr Brown OPA2134PA opamps with sockets. I am also supplying sockets for the RC4559P opamps so you can swap them out if you like. Also included is a Super Bright White LED. If you thought my regular GE-7 & GEB-7 mod was quiet wait until you hear the GE-7 & GEB-7 with a pair of OPA2134PA opamps in the circuit. This pedal now passes pristine clean signal from the input to the output. This is one awesome tone-shaping tool after this mod! Clarity and focus is unbelievably good. As a clean boost it doesn’t get any better than this.

IMPORTANT! – The New GE-7 Plus Mod will only work with the newer GE-7 that has a PCB Board that looks like this. The mod will not work with the older GE-7 PCB that looks like this. I will not be able to adapt the mod to the older GE-7 because the adapter is not compatible with the inline opamp of that pedal. The mod will not work with the older GEB-7. Make sure your pcb looks exactly like thisWARNING — There is an older GEB-7 that looks almost just like the newer version. I just received an e-mail notifying me about this. It looks very similar to the newer version but has a 7-pin inline opamp instead of the 8-pin and so my adapter will not work with it. It also has a 4th DIP Opamp in the upper right corner of the pcb. The pcb looks like this. My new Plus version with the adapter will not work with this version.

Pedal Type

GE-7, GEB-7

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