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GT-500 FET Distortion + Booster and Overdrive Guitar Effects Pedal

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The GT-500 Effects Pedal from Fulltone is a discrete FET Hi-Gain Distortion and Overdrive Booster in one box. You could think of them as 2 separate pedals, or think of them as stages to be linked toge... Read More

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The GT-500 Effects Pedal from Fulltone is a discrete FET Hi-Gain Distortion and Overdrive Booster in one box. You could think of them as 2 separate pedals, or think of them as stages to be linked together for endless combinations. The Hi-Gain side has Volume, Distortion knobs, Bass, Mid, and Highs minipots. Its Booster Side has Volume, Overdrive knobs, Bass and Highs minipots.

Hard-clipped distortion-the way most guitar pedals achieve distortion-at one point in a circuit can be cool, but stage after stage of FET (GT-500) is very real, very amplike, and has ridiculous amounts of sustain even at low volume. It does the great chunky low-string rhythm stuff and cleans up incredibly well when you turn down the guitar's volume. The Fulltone GT500 contains 9 FETs, 2 Mosfets, and 1 Transistor with no opamps or clipping diodes used.

What's special about the EQ? The Hi-Gain side has a discrete Inductor-Driven Midrange circuit-never been done in a pedal before. There's a wah-wah inductor inside the pedal that gives the Midrange control its ability to drastically increase or decrease the entire Low Mid, Mid, and Hi-Mid frequencies, to comical proportions. All this is done without any opamps-this has 100% discrete matched FETs.

This Mid control mixed with a strong Bass and Treble control help give the Fulltone GT-500 the ability to dial in more variations than a simple tone control, which can only roll off the Highs.

The Series Select Switch allows you to choose which pedal comes first (allowing you to instantly change the order of the 2 circuits). For example: A clean boost slamming into the front end a Distortion sounds way different than a Distortion followed by the clean boost, and when the EQs of the respective sides come into play, it's a wide-open canvas. Regardless of which side of the effects pedal is designated as first in line, you can still use each side by itself, completely independent of the other side.

Check the drop-down menu to the right to select colors and/or other options.

  • Maximum Current Draw: 14 milliamps (all knobs cranked)
  • Weight: 2 lb.
  • Size: 5-3/4" W x 2-1/2" H x 3-7/8 D
Distortion side
  • Input impedance: 150K
  • Output impedance: 15K
Booster/OD side
  • Input impedance: 500K
  • Customer Reviews


by PowerReviews

(based on 8 reviews)

Ratings Distribution

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Reviewed by 8 customers

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(1 of 1 customers found this review helpful)


By far, best distortion pedal in the market

By Rafael Antolinez

from Raleigh, NC

I used my BOSS MT-2 Metal Zone for a while, supposedly loving it because i could change my tone so much since it had 2 equalizers. But man, after I tried the GT500 I realized that my MT-2 was nothing but a sad excuse for a distortion pedal. I also used my V2JH Jekyll and Hyde (which is basically a pedal that follows the same twin distortion & overdrive system per say) for a few months; same thing with the TS9 Ibanez Tube Screamer, which is famous for providing such a great overdrive. But wow, after I tried the Fulltone GT500 I knew it was the one. It offers you the possibility of having two different pedals in one and combine both to get an even more powerful sound. You can even choose the order in which you combine them (you either add distortion to you over drive, or drive your distortion even more). It can run either on 18v or 9v (I suggest 18v). On top of everything, the pedal just looks so classy and elegant. This is by far the best distortion pedal in the market.

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(1 of 1 customers found this review helpful)


Awesome pedal!

By Charie Gross

from olmsted falls oh

the first one i bought had a problem so i took it back, but Ive had this pedal for a year now and I use the hell out of it. This sound beats anything you put against it. Crisp, pure, solid tone. you can adjust all of the highs and lows to make it sound just the way you want. Booster works great, distortion sounds better with it turned down pretty far.. especially when youre loud. but yeah, great quality pedal, nothing wrong with it a year later.

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(1 of 3 customers found this review helpful)


Amazing tones!

By Tayler

from vancouver/ washington

Just bought this pedal a few days ago and love it.Gets really nice sounding distortion and amazing clean tones! Would highly recommend this pedal to anyone.

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(7 of 7 customers found this review helpful)


Astounding. 6 stars.

By GDubya

from VA Beach, VA

I would give it an extra star if i could. The GT-500 is easily the most outrageously awesome front end booster/distortion ever. No OpAmps or Diodes, just a chain of 9 FETs and includes a Wah Inductor for Mid Control on the Distortion side. Yup, a Wah inductor, a first. The ability to use either or both pedals independently plus change the order of of units makes this pedal super flexible. You can add some smooth EQ'd distortion into a clean boost for fatness. You can Clean Boost the distortion, pumping harmonics up. Speaking of overtones/Harmonics...they are all over this pedal. You do not lose any ringing harmonic overtones. Also, the GT cleans up like a champ with your volume knob. Just a freak of a pedal. I am able to coax perpetual feedback harmonics, at low volume, without tones of distortion, which is amazing. Use with a good Tube amp. Slam the front of it. Turn any cleaner single channel amp into 3 channel monster. Turn an old Marshall into a Firebreathing Metal machine. You can literally do it all, ESPECIALLY scooped mids with that Wah Inductor, which is really sicko. the tone controls are shelved just right. I would say the general tone of the Distortion is Plexi. The other side can do a huge clean boost with no artifacts, completely transparent. An amazing piece. An astounding buy.

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(10 of 10 customers found this review helpful)


Fulltone GT-500

By Francis Voignier

from San Francisco

I love this pedal!!! It is everything I was looking for in a OD/distortion pedal. A very realistic tone even at low volume. It's also very touch sensitive, back the attack and it sings, hit and it screams.. The lows are rich and tight, no mud here! the EQ adjustments are very responsive and there is plenty of gain on tap. It's hand-made in California, and the price is right! Just awesome!

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(14 of 15 customers found this review helpful)


Finally Found It!!

By Steve

from Dallas, TX

I just bought my first tube amp recently, an AC15. I tried all the way huge products. All sounded great thru my VT, but nothing but treble on the AC except for the Pork Loin (which I kept). Then I tried the GT500 last night. The sales guy said it was designed for a tube amp. I will go out further on a limb and say it was designed specifically for a Vox tube amp!! Very ingenius of someone to put separate bass and treble adjustments on a pedal! I can get the Frampton roar on my Les Paul from the distortion side, and the Keith Richards twang on my Tele from the boost side. The boost and distortion sound great together as well!! If you own a Vox AC, this is your pedal. Want to try something really cool? Les Paul > Pork Loin > GT500 (distortion only) > AC15. Wow........

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(16 of 17 customers found this review helpful)


Can you say marshall?

By Weslee

from CO, Springs

This is the best distortion ive ever played. The only thing that comes close is an older Jekyll & Hyde. But this distortion can be mean led zepplin or a light overdrive if you want, the boost is really a boost not much of an overdrive great for solos. This pedal just kills anything boss mxr or digitech. So dont waste you time with those.

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(24 of 24 customers found this review helpful)


Most used on my Pedalboard

By Jimmy Moran

from dallas, texas

This thing is awesome, I love it, I wouldn't dare think of selling it. I love the option it has of using 9v or 18v, with the 18v it gives more much power and better sound. It is like having a great distortion pedal, and a Fulltone OCD in one pedal, and whats even better is that you can get a clean boost out of it. I play through an orange amp and I use a Fender HSS Strat and it sound is great. I would tell anybody to get this pedal. From the jazz player to the rocker.

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