Positive Grid Spark GO review

Positive Grid enters new territory with its pocket-sized amp that's packed with features

Positive Grid Spark GO front grille
(Image: © Future/Matt McCracken)

Guitar World Verdict

A superb mini amp that's miles ahead of the competition


  • +

    Incredibly loud

  • +

    Fantastic array of sounds

  • +

    Usable practice tools

  • +

    Doubles as a Bluetooth speaker


  • -

    Lacks the low end of a bigger amp

  • -

    Input placement can be awkward

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Recent edit - 06.29.2023: Since this first look review was originally published we received a production model of the Positive Grid Spark GO. The review has been updated accordingly to match the new specs and features, as well as a longer-term view of living with the product.

At a glance

TYPE: Digital modeling mini amp with internal rechargeable battery and Bluetooth
OUTPUT: 5 watts
SPEAKERS: 1x 4.5cm speaker with passive radiator 
EFFECTS: 33 Amp Models, 48 Effects
WEIGHT: 0.36 kg

Buy at Positive Grid

Taking all the features of their ever-popular range of smart amplifiers, Positive Grid Spark GO sees the company move into mini amp territory, packing an unbelievable amount of functionality into an absurdly tiny, take-anywhere enclosure.

Despite the small size, it doesn’t skimp on any features, sharing the exact same amount of hardware presets, practice tools, and Bluetooth connectivity as its bigger sibling the Spark Mini. Using the accompanying Spark app, you can customize your sounds, play along to backing tracks, and learn your favorite song all with an amp that’s not much bigger than your average smartphone or compact digital camera.

We've been living with the Positive Grid Spark GO for some time, in fact, it's sitting on our desk right now as we write this. Having had ample time to explore its features and properly put it to the test, we've made sure to fully explore the ins and outs to give you a comprehensive review. With that in mind, let's dive in...

Positive Grid Spark GO review: Features & looks

Input and volume knob on Positive Grid Spark GO

(Image credit: Future/Matt McCracken)

Upon unboxing the Spark GO we were shocked at the size and the look. It’s positively tiny, smaller than our audio interface, and looks more like a digital camera than a guitar amp. It shares the same black and gold aesthetic as its predecessors, matching perfectly with the Spark Mini that already sits on our desktop, with that splash of red on the carrying handle and the PG logo on the front grille.

The buttons will be familiar to anyone who’s used the Mini as well. There’s a gold button that cycles through the four hardware presets, with more available via the accompanying app. Separate volume controls determine the level for any music you play through it via Bluetooth whilst a large, gold rotary control with the guitar input on the inset lets you increase or decrease the volume of your guitar. It rotates infinitely, so you've been warned, there's no way of knowing what volume it's on when you come back to it.

It's easily the smallest amplifier we've ever held in our hands

Placing it on top of our Spark Mini that sits on our desk, the pair look like a perfect lunchbox amp and cabinet combo with their matched styling, and it reaffirms just how tiny this amp is. Loads of companies proclaim that their products are ‘pocket-sized’ but the Spark GO will actually fit in your pocket – provided you’re not wearing skinny jeans that is. Our smartphone is larger in terms of height and width, it’s just the depth that makes the Spark GO bigger feeling overall, but it’s easily the smallest amplifier we’ve ever held in our hands.

It feels fairly hefty despite weighing just 0.36kg, and it’s got a nice solidity about it – like it’ll put up with being dropped accidentally when you’re out and about. The textured rubber of the case grips onto any surfaces you place it upon in lieu of traditional amp feet, whilst a small carry handle attaches via a gold button on the side for easy transportation. The additional black grille lends it a stealthier look that we actually prefer to the classic gold and black combo, but that's our personal preference for the darker side of life, they both look great.

Positive Grid Spark GO review: Performance

Control panel on Positive Grid Spark GO

(Image credit: Future/Matt McCracken)

After charging our Spark GO we plug in our hot-humbucker-equipped Ibanez RG and set out to see what this mini amp is capable of. There’s a slight snag straight away though, the Spark GO doesn’t want to sit upright with an angled guitar cable plugged in. Our cables are pretty heavy-duty for regular gigging, and the weight drags the amp over so it lies flat. Swapping the ends over we get a better result with the straight head into the GO and proceed to cycle through the hardware presets to see what's what.

The first thing we note is that this thing is loud. Given the size of the Spark GO, you’d be forgiven for thinking it’s more a toy than a proper guitar amp, and you’d be totally wrong. Switching through to a high gain setting and cranking the rotary knob, we’re no more than two minutes into some blistering lead work when a noise complaint ensues from our partner working upstairs. There’s even some incredulity when she sees the size of the culprit is smaller than the average paperback.

We’re no more than two minutes into some blistering lead work when a noise complaint ensues

The sound quality is absolutely brilliant and we’re in awe at both the depth of tone and the volume that emanates from this tiny unit. The presets are every bit as good as those on our Spark Mini and although there’s a slight lack of low-end fullness that’s unavoidable due to the size, it’s easily forgiven in the wake of the GO's punchy clarity. Even at higher volumes, it remains crisp sounding, and although we did manage to overload the guitar presets with a drop-tuned baritone, plugging in our Mustang bass and selecting one of the bass guitar presets delivered an excellent, round bass tone with a depth that belied such a tiny speaker.

The selection of presets is really usable, offering a fantastic starting point for your own sonic sculpting with everything from spacey ambiance right through to tight high gain covered. Some of the effects are absolutely phenomenal, and we spent far too long playing with the realistic oscillations of the multi-head tape delay. The sound quality is staggering considering its tiny form factor, and there are loads of emulated gear to pick from when creating your own presets. If you're looking for a specific tone from your favorite song you can search the user-curated ToneCloud library to find everything from EVH to SRV tones.

Charging port and power button on Positive Grid Spark GO

(Image credit: Future/Matt McCracken)

The Spark GO has got all the same great practice tools as the larger Spark and Spark Mini via the accompanying app. You can jam along with an ever-morphing backing track courtesy of the Smart Jam feature that responds to your playing dynamics, or connect to your Spotify or Apple Music and have the Spark GO automatically generate chords for all your favorite tunes. Add in a whole bunch of backing tracks in various keys and tabbed songs and you have all the practice features you’ll ever need.

With its insane volume level and excellent portability, Spark GO is also the perfect Bluetooth speaker. Whether you fancy taking it into the great outdoors to enjoy some tunes, or just cranking it when you’ve got some friends over, it’s a phenomenal-sounding speaker in spite of all its other features. We blasted everything from our favorite bass-testing track in Lil Wayne’s ‘A Milli’ right through to more esoteric offerings from Radiohead’s ‘Kid A’ and the Spark GO far exceeded our expectations for something so small, offering a punchy tone as well as an excellent depth of sound in more complex mixes.

Positive Grid Spark GO review: Verdict

Passive radiator of Positive Grid Spark GO

(Image credit: Future/Matt McCracken)

We can’t think of a better way to practice on the go or at home than this fantastic mini amplifier. It won’t take up loads of space whilst simultaneously filling the room with its impressive volume and satisfying any guitar player with a high-fidelity sound. For guitarists just getting started, or those looking for a small practice amp, Positive Grid’s Spark GO is a fantastic option.

Positive Grid Spark GO review: Specifications

  • PRICE: RRP $129
  • TYPE: Digital modeling mini amp with internal rechargeable battery for guitar, bass, and acoustic with BIAS Tone Engine, and app integration 
  • OUTPUT: 5 watts
  • SPEAKERS: 1x 4.5cm speaker with passive radiator 
  • CONTROLS: Preset, music volume, power on/off
  • ONBOARD EFFECTS: 33 Amp Models (additional available to purchase via Jimi Hendrix add-on), 48 Effects
  • SOCKETS: 1/4” guitar input, 1/8” headphone out, Bluetooth audio, USB-C connectivity for recording
  • WEIGHT: 0.36 kg
  • BUY AT: Positive Grid

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Matt McCracken
Junior Deals Writer

Matt is a Junior Deals Writer at Guitar World and has been playing guitar as his main instrument for well over 20 years. He also plays drums, bass, and keys – producing out of his home studio in Manchester, UK. He has previously worked for Dawsons Music, Northwest Guitars, and freelanced for various magazines and blogs, writing reviews, how-to's, and features. When he's not downloading the latest VSTs or justifying yet another guitar pedal purchase, you'll find him making a racket with Northern noise hounds JACKALS.