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Boss GT-100 Amp Effects Processor
Boss GT-100 Amp Effects Processor
Boss GT-100 Amp Effects Processor
Boss GT-100 Amp Effects Processor
Boss GT-100 Amp Effects Processor
Boss GT-100 Amp Effects Processor
Boss GT-100 Amp Effects Processor

Boss GT-100 Amp Effects Processor

Boss GT-100 Amp Effects Processor

$279.00

(382 reviews)

The Boss GT-1 delivers premium tones in an ultra-portable package. With a sound engine derived from the top-of-the-line GT-100, you have access to tone quality and sound-shaping ability that exceeds typical compact multi-effects. Included effects types include everything you'd expect (overdrive/distortion, chorus, delay) plus Boss' cutting-edge MDP technology and utility effects such as their Acoustic and Guitar Simulators. Numerous incredible COSM amp models are also included, as well is a looper Though light and compact, the GT-1 delivers the rugged durability that Boss is famous for. The modern design is easy to slip into your gig bag while a choice of optional AC or battery power provides mobile flexibility for performing and practicing anywhere. Up to seven hours of battery life is possible with four AA-size batteries, making the GT-1 ideal for street gigs, backstage warm-ups, hotel practice, and other on-the-go scenarios. With the GT-1’s straightforward interface it’s simple to build great tones right away. The Easy Select function allows you to quickly find patches by genre, distortion, or effect type, while Easy Edit lets them tweak drive, modulation, and echo tones to near perfection in an instant. Dedicated panel buttons provide quick on/off switches for effect groups, and also unlock deep-dive parameters for microscopic fine-tuning.

The Boss GT-1 delivers premium tones in an ultra-portable package. With a sound engine derived from the top-of-the-line GT-100, you have access to tone quality and sound-shaping ability that exceeds typical compact multi-effects. Included effects types include everything you'd expect (overdrive/distortion, chorus, delay) plus Boss' cutting-edge MDP technology and utility effects such as their Acoustic and Guitar Simulators. Numerous incredible COSM amp models are also included, as well is a looper Though light and compact, the GT-1 delivers the rugged durability that Boss is famous for. The modern design is easy to slip into your gig bag while a choice of optional AC or battery power provides mobile flexibility for performing and practicing anywhere. Up to seven hours of battery life is possible with four AA-size batteries, making the GT-1 ideal for street gigs, backstage warm-ups, hotel practice, and other on-the-go scenarios. With the GT-1’s straightforward interface it’s simple to build great tones right away. The Easy Select function allows you to quickly find patches by genre, distortion, or effect type, while Easy Edit lets them tweak drive, modulation, and echo tones to near perfection in an instant. Dedicated panel buttons provide quick on/off switches for effect groups, and also unlock deep-dive parameters for microscopic fine-tuning.

(382 reviews)

The Boss GT-1 delivers premium tones in an ultra-portable package. With a sound engine derived from the top-of-the-line GT-100, you have access to tone quality and sound-shaping ability that exceeds typical compact multi-effects. Included effects types include everything you'd expect (overdrive/distortion, chorus, delay) plus Boss' cutting-edge MDP technology and utility effects such as their Acoustic and Guitar Simulators. Numerous incredible COSM amp models are also included, as well is a looper Though light and compact, the GT-1 delivers the rugged durability that Boss is famous for. The modern design is easy to slip into your gig bag while a choice of optional AC or battery power provides mobile flexibility for performing and practicing anywhere. Up to seven hours of battery life is possible with four AA-size batteries, making the GT-1 ideal for street gigs, backstage warm-ups, hotel practice, and other on-the-go scenarios. With the GT-1’s straightforward interface it’s simple to build great tones right away. The Easy Select function allows you to quickly find patches by genre, distortion, or effect type, while Easy Edit lets them tweak drive, modulation, and echo tones to near perfection in an instant. Dedicated panel buttons provide quick on/off switches for effect groups, and also unlock deep-dive parameters for microscopic fine-tuning.

The Boss GT-1 delivers premium tones in an ultra-portable package. With a sound engine derived from the top-of-the-line GT-100, you have access to tone quality and sound-shaping ability that exceeds typical compact multi-effects. Included effects types include everything you'd expect (overdrive/distortion, chorus, delay) plus Boss' cutting-edge MDP technology and utility effects such as their Acoustic and Guitar Simulators. Numerous incredible COSM amp models are also included, as well is a looper Though light and compact, the GT-1 delivers the rugged durability that Boss is famous for. The modern design is easy to slip into your gig bag while a choice of optional AC or battery power provides mobile flexibility for performing and practicing anywhere. Up to seven hours of battery life is possible with four AA-size batteries, making the GT-1 ideal for street gigs, backstage warm-ups, hotel practice, and other on-the-go scenarios. With the GT-1’s straightforward interface it’s simple to build great tones right away. The Easy Select function allows you to quickly find patches by genre, distortion, or effect type, while Easy Edit lets them tweak drive, modulation, and echo tones to near perfection in an instant. Dedicated panel buttons provide quick on/off switches for effect groups, and also unlock deep-dive parameters for microscopic fine-tuning.

$279.00 - $1,071.08

in 42 offers

The lowest price for Boss GT-100 Amp Effects Processor right now is $279.00 at Cash Converters, compared across 20 retailers.

The all-time low was $200.00 on 10 Mar 2026 — today's price is 40% above the lowest ever. It has been notably cheaper before — worth setting a price alert.

Prices last updated 10 Sept 2026.

Price comparison

Price data powered by pricesAPI.io

Last updated at 10/09/2026 05:56:40

Please note: price history and price alerts are not available for some stores, including Amazon.com.au.
https://www.google.com/s2/favicons?domain=amazon.com.au&sz=64Amazon.com.au

$1,005.00

Boss GT-100 Guitar Multi-Effects Pedal

Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

https://www.google.com/s2/favicons?domain=cashconverters.com.au&sz=64Cash Converters

$279.00

Boss Gt-100 Black Effects Pedal

Delivery $41.45

https://www.google.com/s2/favicons?domain=reverb.com&sz=64Reverb

$279.35

Boss GT-100 Guitar Effects Processor Black

https://www.google.com/s2/favicons?domain=reverb.com&sz=64Reverb

$363.10

Boss GT-100 Amp Effects Processor

https://www.google.com/s2/favicons?domain=reverb.com&sz=64Reverb

$502.57

Boss GT-100 Version 2.0 Guitar Effects Processor

Delivery $168.08

https://www.google.com/s2/favicons?domain=banzaihobby.com&sz=64banzaihobby.com

$298.80

BOSS Multi-Effects GT-100

Delivery $79.38

https://www.google.com/s2/favicons?domain=banzaihobby.com&sz=64banzaihobby.com

$355.85

BOSS Multi-Effects GT-100

Delivery $60.44

https://www.google.com/s2/favicons?domain=coololdguitars.shop&sz=64Cool Old Guitars

$400.00

Boss GT-100 Guitar Multi Effects

Free delivery

https://www.google.com/s2/favicons?domain=ebay.com.au&sz=64eBay.com.au

$414.36

Boss Gt-100 Guitar Multi Effects Processor Pedal Cosm Amp Modeling

Free delivery

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https://www.google.com/s2/favicons?domain=ebay.com.au&sz=64eBay.com.au

$426.35

Boss Gt-100 Multi-effects Processor Guitar Effect Pedal Good Gp

Free delivery

Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

Price history

Price history

Please note: price history and price alerts are not available for some stores, including Amazon.com.au.

Reviews

Boss GT-100
22 March 2018Ginger

originally posted on musiciansfriend.com

I am pretty much a novice when it comes to effects pedals. I am an acoustic guitarist/singer, and pretty good at that, and I was pretty much overwhelmed when I unpacked the Boss GT-100, but I followed the easy to follow manual, and I was up and running in no time. I'm a girl, and I have no knowledge of effects for electric guitars; however, I am learning fast how to utilize the patches in this unit. The only thing I wish it had added was some actual songs that you can use with certain patches. A page in the manual would have been really helpful. So here I am trying to match patches to songs I know, and it's taking a lot of time for a novice like me; but I am actually catching on, and I even have found a few patches for some of the songs I know. I imagine more ... MoreI am pretty much a novice when it comes to effects pedals. I am an acoustic guitarist/singer, and pretty good at that, and I was pretty much overwhelmed when I unpacked the Boss GT-100, but I followed the easy to follow manual, and I was up and running in no time. I'm a girl, and I have no knowledge of effects for electric guitars; however, I am learning fast how to utilize the patches in this unit. The only thing I wish it had added was some actual songs that you can use with certain patches. A page in the manual would have been really helpful. So here I am trying to match patches to songs I know, and it's taking a lot of time for a novice like me; but I am actually catching on, and I even have found a few patches for some of the songs I know. I imagine more seasoned electric guitar players have an easier time of it. As for me, I love it. I am actually at the point where I am going to download a few patches made for this unit. For someone, a novice, that has had it for only two weeks, that should tell you how easy this unit is to use.

Delighted
27 February 2021John B.

originally posted on pmtonline.co.uk

After using an HD500x for a couple of years, I finally bought the unit that I had wanted in the first place, but been talked out of by a (justifiably) enthusiastic Line 6 fan in my circle of musical collaborators.The choice between that and the GT-100 is largely a matter of subjective taste. Neither is , of course, the very latest technology , yet both can yield impressive results. I have to say, though, that the Boss unit is immediately more to my liking.I will continue to use the Line 6 unit, of course, which is claimed by fans to model branded amps and effects more accurately, and gives very fine control over every sound parameter I can imagine.However, to my ears (playing through a very basic Fender Blues Jr.) the Boss sounds more open and natural. It has ... MoreAfter using an HD500x for a couple of years, I finally bought the unit that I had wanted in the first place, but been talked out of by a (justifiably) enthusiastic Line 6 fan in my circle of musical collaborators.The choice between that and the GT-100 is largely a matter of subjective taste. Neither is , of course, the very latest technology , yet both can yield impressive results. I have to say, though, that the Boss unit is immediately more to my liking.I will continue to use the Line 6 unit, of course, which is claimed by fans to model branded amps and effects more accurately, and gives very fine control over every sound parameter I can imagine.However, to my ears (playing through a very basic Fender Blues Jr.) the Boss sounds more open and natural. It has many more preset patches that I would personally be comfortable using out-of-the-box. And for when I do need to edit a patch, I find the interface clearer and more intuitive.

Don't be afraid to buy Boss GT100
7 November 2016PedalTweaker

originally posted on musiciansfriend.com

I was a Digitech RP500 user and to me that multi was so easy to set up. I sold that RP and switched to Boss GT10 to see what's the fuzz about it. I was not impressed at all. Then I met a guitarist online and he was selling his Boss GT100. We both agreed on a trade plus cash deal and so I got the GT100. As soon as I bring it home and tested, i can little agree the sound of the GT100 was warm than the GT10. But as days and months go by and try using I noticed a typical "high mid ish" of the GT100 like the Boss GT10. By the way, I'm using the GT100 directly plugged to my amp's input. Just few days ago I was looking for a reference info how to reset the GT100's preset of the few patches that I modified. I incidentally got into a forum about GT100 and it was mentioned ... MoreI was a Digitech RP500 user and to me that multi was so easy to set up. I sold that RP and switched to Boss GT10 to see what's the fuzz about it. I was not impressed at all. Then I met a guitarist online and he was selling his Boss GT100. We both agreed on a trade plus cash deal and so I got the GT100. As soon as I bring it home and tested, i can little agree the sound of the GT100 was warm than the GT10. But as days and months go by and try using I noticed a typical "high mid ish" of the GT100 like the Boss GT10. By the way, I'm using the GT100 directly plugged to my amp's input. Just few days ago I was looking for a reference info how to reset the GT100's preset of the few patches that I modified. I incidentally got into a forum about GT100 and it was mentioned there about adjusting the input level of the GT100 global setting. They said if you have a humbucking pickup the input level should -7db below. But if you have a weak single coil pickups then used -7db up. I'm using a Fender Mexico black top that I put an SD TB4 on the bridge and 2 Dimarzio 61 on neck and middle. To my suprise the -7db is already hot yet controlled sound no more clippy sound. But the -6db is what I really like. All the effect from distortions to modulations, reverbs now sound warm and less digital to somewhat organic.That's how my has perceived. Also take note of the high mid Q on the global setting. Default is 800 Hz. I backed it down to 500 Hz to lessen the high mids. Try it and thank those people who share this info on the web.

Specification

Variant
titleDefault Title

Price comparison

Updated about 9 hours ago
Please note: price history and price alerts are not available for some stores, including Amazon.com.au.
https://www.google.com/s2/favicons?domain=amazon.com.au&sz=64
Amazon.com.au

$1,005.00

Boss GT-100 Guitar Multi-Effects Pedal

Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

https://www.google.com/s2/favicons?domain=cashconverters.com.au&sz=64
Cash Converters

$279.00

Boss Gt-100 Black Effects Pedal

Delivery $41.45

https://www.google.com/s2/favicons?domain=reverb.com&sz=64
Reverb

$279.35

Out of stock

Boss GT-100 Guitar Effects Processor Black

https://www.google.com/s2/favicons?domain=reverb.com&sz=64
Reverb

$363.10

Out of stock

Boss GT-100 Amp Effects Processor

https://www.google.com/s2/favicons?domain=reverb.com&sz=64
Reverb

$502.57

Boss GT-100 Version 2.0 Guitar Effects Processor

Delivery $168.08

Price history

Price history

Please note: price history and price alerts are not available for some stores, including Amazon.com.au.

Reviews

Boss GT-100
22 March 2018

I am pretty much a novice when it comes to effects pedals. I am an acoustic guitarist/singer, and pretty good at that, and I was pretty much overwhelmed when I unpacked the Boss GT-100, but I followed the easy to follow manual, and I was up and running in no time. I'm a girl, and I have no knowledge of effects for electric guitars; however, I am learning fast how to utilize the patches in this unit. The only thing I wish it had added was some actual songs that you can use with certain patches. A page in the manual would have been really helpful. So here I am trying to match patches to songs I know, and it's taking a lot of time for a novice like me; but I am actually catching on, and I even have found a few patches for some of the songs I know. I imagine more ... MoreI am pretty much a novice when it comes to effects pedals. I am an acoustic guitarist/singer, and pretty good at that, and I was pretty much overwhelmed when I unpacked the Boss GT-100, but I followed the easy to follow manual, and I was up and running in no time. I'm a girl, and I have no knowledge of effects for electric guitars; however, I am learning fast how to utilize the patches in this unit. The only thing I wish it had added was some actual songs that you can use with certain patches. A page in the manual would have been really helpful. So here I am trying to match patches to songs I know, and it's taking a lot of time for a novice like me; but I am actually catching on, and I even have found a few patches for some of the songs I know. I imagine more seasoned electric guitar players have an easier time of it. As for me, I love it. I am actually at the point where I am going to download a few patches made for this unit. For someone, a novice, that has had it for only two weeks, that should tell you how easy this unit is to use.

Ginger originally posted on musiciansfriend.com
Delighted
27 February 2021

After using an HD500x for a couple of years, I finally bought the unit that I had wanted in the first place, but been talked out of by a (justifiably) enthusiastic Line 6 fan in my circle of musical collaborators.The choice between that and the GT-100 is largely a matter of subjective taste. Neither is , of course, the very latest technology , yet both can yield impressive results. I have to say, though, that the Boss unit is immediately more to my liking.I will continue to use the Line 6 unit, of course, which is claimed by fans to model branded amps and effects more accurately, and gives very fine control over every sound parameter I can imagine.However, to my ears (playing through a very basic Fender Blues Jr.) the Boss sounds more open and natural. It has ... MoreAfter using an HD500x for a couple of years, I finally bought the unit that I had wanted in the first place, but been talked out of by a (justifiably) enthusiastic Line 6 fan in my circle of musical collaborators.The choice between that and the GT-100 is largely a matter of subjective taste. Neither is , of course, the very latest technology , yet both can yield impressive results. I have to say, though, that the Boss unit is immediately more to my liking.I will continue to use the Line 6 unit, of course, which is claimed by fans to model branded amps and effects more accurately, and gives very fine control over every sound parameter I can imagine.However, to my ears (playing through a very basic Fender Blues Jr.) the Boss sounds more open and natural. It has many more preset patches that I would personally be comfortable using out-of-the-box. And for when I do need to edit a patch, I find the interface clearer and more intuitive.

John B. originally posted on pmtonline.co.uk
Don't be afraid to buy Boss GT100
7 November 2016

I was a Digitech RP500 user and to me that multi was so easy to set up. I sold that RP and switched to Boss GT10 to see what's the fuzz about it. I was not impressed at all. Then I met a guitarist online and he was selling his Boss GT100. We both agreed on a trade plus cash deal and so I got the GT100. As soon as I bring it home and tested, i can little agree the sound of the GT100 was warm than the GT10. But as days and months go by and try using I noticed a typical "high mid ish" of the GT100 like the Boss GT10. By the way, I'm using the GT100 directly plugged to my amp's input. Just few days ago I was looking for a reference info how to reset the GT100's preset of the few patches that I modified. I incidentally got into a forum about GT100 and it was mentioned ... MoreI was a Digitech RP500 user and to me that multi was so easy to set up. I sold that RP and switched to Boss GT10 to see what's the fuzz about it. I was not impressed at all. Then I met a guitarist online and he was selling his Boss GT100. We both agreed on a trade plus cash deal and so I got the GT100. As soon as I bring it home and tested, i can little agree the sound of the GT100 was warm than the GT10. But as days and months go by and try using I noticed a typical "high mid ish" of the GT100 like the Boss GT10. By the way, I'm using the GT100 directly plugged to my amp's input. Just few days ago I was looking for a reference info how to reset the GT100's preset of the few patches that I modified. I incidentally got into a forum about GT100 and it was mentioned there about adjusting the input level of the GT100 global setting. They said if you have a humbucking pickup the input level should -7db below. But if you have a weak single coil pickups then used -7db up. I'm using a Fender Mexico black top that I put an SD TB4 on the bridge and 2 Dimarzio 61 on neck and middle. To my suprise the -7db is already hot yet controlled sound no more clippy sound. But the -6db is what I really like. All the effect from distortions to modulations, reverbs now sound warm and less digital to somewhat organic.That's how my has perceived. Also take note of the high mid Q on the global setting. Default is 800 Hz. I backed it down to 500 Hz to lessen the high mids. Try it and thank those people who share this info on the web.

PedalTweaker originally posted on musiciansfriend.com
Easy to programme, great sounds and screens
11 January 2022

If youve use a similar product (I moved up from the previous GT8) youll know that you cant have massive functionality without a bit of a learning curve. Its for that reason Id put off upgrading to the GT-100 but after only a few hours Im really glad I did. This is a great system. You can create great sounds by just finding a patch you like and editing it and saving it as a user patch. But it is astonishingly easy to create them from scratch. Using the EZ Tones function you will be able to find something that suits the kind of music that you want to play, and then make minor edits to it. After a little bit of fiddling around you will realise that visually scanning through the effects chain, and turning on/off and tweaking patches makes it very simple to edit and save ... MoreIf youve use a similar product (I moved up from the previous GT8) youll know that you cant have massive functionality without a bit of a learning curve. Its for that reason Id put off upgrading to the GT-100 but after only a few hours Im really glad I did. This is a great system. You can create great sounds by just finding a patch you like and editing it and saving it as a user patch. But it is astonishingly easy to create them from scratch. Using the EZ Tones function you will be able to find something that suits the kind of music that you want to play, and then make minor edits to it. After a little bit of fiddling around you will realise that visually scanning through the effects chain, and turning on/off and tweaking patches makes it very simple to edit and save the sounds you want. One small criticism, as they seem to have dropped the solo function (you used to be able to step on a patch a second time I hear the louder version). You can still using this using the CTL pedal however. I have not used it to record using USB interface yet, and I do not know how it compares to them much more expensive This is a top piece of kit so do not hesitate. I have not used it to record using USB interface yet, and I do not know how it compares to them much more expensive GT1000 but.

garylikestobuyandsell originally posted on ebay.com
Excellent Effects
4 December 2019

I have had Boss and Line 6 devices and really like the sound of Boss more. This works beautifully as an audio interface for my DAW. I like the send & return and the overall flexibility in configuration options. I tend to programme from the laptop but with the two screens and many knobs, it's not too stressful to tweak directly. I like the build quality and the appearance. But all of that would be irrelevant if it didn't sound right and I love the sound. I use it for bass (active and passive) as well as guitar and I find it's great for both. To my ears, it's more natural sounding than the, admittedly older model, Line 6 I had. If this were to be lost, stolen or destroyed I would definitely get another.

neill_shenton originally posted on ebay.com
From 4 to 5 Stars
11 January 2014

I previously gave this unit 4 out of 5 stars, but I am now upgrading it to a full 5 stars, especially after playing with it some more. This unit basically replaces all of your effects pedals AND amplifiers!!! So, instead of getting that Marshall stack or Fender Twin, you can invest in a very nice PA system and mixer instead. The built-in pre-amp faithfully reproduces vintage and modern amplifier sounds (you must choose the correct output first under the "SYSTEM" menu); hook it up to your PA system or guitar amp and you can get big sounds without the big guitar amps. You can also use it like a pedal board, with a barrel load of simulated stomp boxes that you can turn on an off by stomping on them in "Manual" mode. You can turn off the pre-amp if you're actually using ... MoreI previously gave this unit 4 out of 5 stars, but I am now upgrading it to a full 5 stars, especially after playing with it some more. This unit basically replaces all of your effects pedals AND amplifiers!!! So, instead of getting that Marshall stack or Fender Twin, you can invest in a very nice PA system and mixer instead. The built-in pre-amp faithfully reproduces vintage and modern amplifier sounds (you must choose the correct output first under the "SYSTEM" menu); hook it up to your PA system or guitar amp and you can get big sounds without the big guitar amps. You can also use it like a pedal board, with a barrel load of simulated stomp boxes that you can turn on an off by stomping on them in "Manual" mode. You can turn off the pre-amp if you're actually using a very nice amp (ahem, Marshall JVM or Fender Twin class). The looper is every bit as horrible as I've described it in my previous review, but I realize that the GT-100 wasn't really designed for looping after all (they have the RC series loopers for that). That's a shame, because I really like to solo over a looping rhythm track. The menus are a breeze to navigate and the user guide is a rather thin and much appreciated booklet, instead of the typical doorstop-type book. The patches are easy to create and store and copy-and-paste and transfer and DELETE ("Initialize" will delete a patch). Because the "ACCEL/CTL" and "PHRASE/LOOP" pedals are thoroughly useless and just make the footprint of this unit 25% wider than it needs to be, you can make the pedals useful again by reassigning them--this is especially useful in "MANUAL" mode, where the pedals act like stomp boxes (you can simulate up to 8 stomp boxes!). The GT-100 represents a tremendous value for what it was designed to do (it was definitely NOT designed to be a looper at all). The only reason I upgraded my review was because I got to know the unit some more and discovered that it played nice with my Fender G-DEC3 Thirty modeling amp and the G-DEC3's awesome Phrase Loop function (coupled with the ULT-4 foot switch).

VypalonG originally posted on musiciansfriend.com
Plays well WITH amp
7 April 2015

Like most, I have had ton of different setups over my years of playing. I have always wanted a nice, budget friendly multi-effects unit that integrates with my amp - not to replace it. The GT-100 works beautifully in this regard (and also surprised me at how well it could replace my amp, too!).For me, the best thing about this is that I can easily take the GT, my guitar, and my amp (or any amp with a decent clean channel) and happily have a jam or play a gig with minimal fuss. I don't even need to setup a bunch of patches - I just setup a couple patches as different 'pedalboard' layouts and use the unit in Manual Mode. The global EQ can compensate for any difference between amps/rooms and can be quickly adjusted.The icing for me was the fact that the amp sims ... MoreLike most, I have had ton of different setups over my years of playing. I have always wanted a nice, budget friendly multi-effects unit that integrates with my amp - not to replace it. The GT-100 works beautifully in this regard (and also surprised me at how well it could replace my amp, too!).For me, the best thing about this is that I can easily take the GT, my guitar, and my amp (or any amp with a decent clean channel) and happily have a jam or play a gig with minimal fuss. I don't even need to setup a bunch of patches - I just setup a couple patches as different 'pedalboard' layouts and use the unit in Manual Mode. The global EQ can compensate for any difference between amps/rooms and can be quickly adjusted.The icing for me was the fact that the amp sims and overdrives sound REALLY good and are very useable with an actual amp. I could never get the HD500X to sound near as good as the GT does with all of my amps (using the 4CM). The HD500X might be great for going direct or recording, but if you want to use a multi-effects with an actual amp (in my case, a Blackstar HT-40 or Crate VFX5112 or VFX5212), the GT-100 is the choice - hands down.Likes:- Can control my amp channels from the unit (and save the amp setting in patches)- OD and amp simulations sound better to me than the HD500X when using them with in the 4CM - I feel they are WAY more useable with an actual amp- Effects are standard BOSS quality re: excellent- Very easy to use and make quick adjustments- Super flexible footswitch assignments - can have one footswitch control multiple parameter changes across all effects and a can freely assign what each footswitch does (in Manual Mode)- Power button! (are you kidding me Line 6...)- Easy to read and useful display- Great polyphonic tuner with the v2.0 updateNo Likes:- Effect blocks can be placed anywhere you want, but there are dedicated effects blocks for Comp, OD, Chorus, Delay, Reverb that can't be changed, leaving you with only two available blocks for "other" effects (HD500X will let you put any effect in any of the 8 available blocks - but you can easily run out of DSP depending on what effects are used)- I like 3PDT footswitches, but understand why BOSS used this type of footswitch- Would like some sort of physical feedback when clicking on the expression pedal-No opinion:- Looper isn't as nice as the HD500X, but is still very usable for a multi-effects unit (if you are really into looping, you need a dedicated looper anyway)- No XLR outs (I don't & won't ever go direct)- No Stereo FX send/return (don't use stereo effects and if I did the GT would be handling them anyhow)- Have no clue how it compares to the HD500X for recording - don't use either of them for that purpose

scheelio originally posted on musiciansfriend.com
UPDATE and apology for bad review in 2012
1 March 2015

If you don't care to read this long review here is the summary: Please ignore my bad review from 2012, I think the unit I had was defective and had gain or digital issues. I bought another one and it sounds much better. I bought one of these in 2012 and afterwards returned it and wrote a bad review in 2012. I can't go in and edit the old review, so I am posting this to set the record straight. I thought that the amp modeling was terrible since the unit I had sounded so bad. I tried for days to get a decent sound and eventually returned the unit and got a POD HD500 which I still own. Recently I had a chance to get one of these at a large discount and decided to give it another try. I figured that as bad as the amp modeling was I would just bypass it and use the ... MoreIf you don't care to read this long review here is the summary: Please ignore my bad review from 2012, I think the unit I had was defective and had gain or digital issues. I bought another one and it sounds much better. I bought one of these in 2012 and afterwards returned it and wrote a bad review in 2012. I can't go in and edit the old review, so I am posting this to set the record straight. I thought that the amp modeling was terrible since the unit I had sounded so bad. I tried for days to get a decent sound and eventually returned the unit and got a POD HD500 which I still own. Recently I had a chance to get one of these at a large discount and decided to give it another try. I figured that as bad as the amp modeling was I would just bypass it and use the 4-cable method to use my amps tone. I'm not sure if it is the new firmware in these (ver 2.03) or if the unit I originally bought was defective, but this one sounds much better. While the amp models don't quite respond as accurately as the HD500, they sound good. They don't have as much of the thin digital sound as the pod, they are much fuller. The unit overall sounds warmer than the HD500, less noisy and some of the advanced effects like pitch/harmony and slicer are better than the POD. One major difference between the HD500 and the GT-100: The basic tone of the unit when amp modeling is turned off. This is the most important thing to note because I think it will affect your opinion when you demo the unit. When I turn off the amp modeling on both units and set the bass/treb to flat, the boss has a very neutral flat sound like a JC-120. When I do the same with the HD-500, it still sounds scooped like an old fender amp with the bright switch on. This might explain why the pod sounds more thin and digital than the Boss. It also makes it have the illusion of having better sound clarity than the BOSS. After figuring this out and tweaking extensively I can get much better clean tones from the GT-100. It also makes fret buzz much louder on the HD500 than the GT-100. I've been using it for a few weeks now side-by-side with my HD500, and I see good and bad in both of them. I will probably be using the GT-100 as my primary unit because the most important thing is the sound quality and it is better with the BOSS than the POD. The HD500 has a distant sound, like you are listening to a pre recorded sound rather than live, which you might not mind if all you do is record with it, but for live it just makes it get lost in the background when playing with others. I think all digital units do this to a certain point but it is definitely worse with the HD500 than the GT-100. One last thing: The software with the Line 6 unit is much better than the Boss. With my Macbook pro (8gb ram and fast solid-state drive) the Boss Tone studio software has a lot of lag and wait time.

Gary originally posted on guitarcenter.com
What did I do without this multi effect's pedal!?
30 October 2021

This unit is just incredible. I've been playing since the early 70's and with all the equipment that I've owned I really think the GT100 has possibly impressed me more than anything I've bought! There's some wonderful preset sounds in this tone monster and it's easy to edit the one's that you like. If you're already proficient at programming pedals then this one will be a dream for you to manipulate. This isn't my first multi effects pedal but I don't enjoy programming and this is by far the easiest to program of the one's I've owned. I can't say enough about the sound of this thing. It has every tone that you could ever need. It's extremely quiet too. I'm definitely glad that I made this purchase. I can see a lasting relationship building!

Alan originally posted on guitarcenter.com
Works great with amps
28 October 2022

This effects processor is great. It can give you any sound you like, and you have a billion different ways to use it.However, if you should decide to plug this thing into an amp, do not plug into the input. Make sure your amp has an effects loop. Of course, these pedals are not made with true bypass because they are not designed to be bypassed, and plugging something like say an acoustic guitar into the input on the pedal and then into the amp would be terrible.That being said, if you do not have an effects loop, you can use your clean channel if it's nice and clear when you noon the eq on it. Or if you can get your hands on some Orange (or other) amps with Natural channels, clean with no eq, that would be even better.Or go direct, that's always the best way ... MoreThis effects processor is great. It can give you any sound you like, and you have a billion different ways to use it.However, if you should decide to plug this thing into an amp, do not plug into the input. Make sure your amp has an effects loop. Of course, these pedals are not made with true bypass because they are not designed to be bypassed, and plugging something like say an acoustic guitar into the input on the pedal and then into the amp would be terrible.That being said, if you do not have an effects loop, you can use your clean channel if it's nice and clear when you noon the eq on it. Or if you can get your hands on some Orange (or other) amps with Natural channels, clean with no eq, that would be even better.Or go direct, that's always the best way anyway.

Jonny originally posted on musiciansfriend.com

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