Positive GridSpark Mini 10W Small Smart Guitar Amp & Bluetooth Speaker | Portable Sound for Guitar Playing at Home or On The Go | Black

Solid well designed and built little amp. The form factor is great. It can go anywhere and produces a big sound with a battery that lasts a long time. Once I went through the long process of configuring presets for optimal sound with my instruments (acoustic guitar and dulcimer: both with pickups) the sound was good, natural and as loud as needed. I also updated the firmware which was a bit of a pain.The jam feature seems gimmicky though I haven't played with it much. Overall, the presets, quality of effects etc are pretty good.As a bluetooth speaker it's okay. The sound is reasonably balanced though it lacks true fidelity e.g. good sound stage, crisp clean high etc. I suspect part of the reason is a cheap SBC bluetooth audio codec. Codecs can make a huge difference. The should have at least used Apt-X which would produce better sound.Overall, it's a piece of quality gear for those who want a solid practice amp in a tiny go anywhere form factor. As a bluetooth speaker it does fine but don't expect high fidelity.EDIT: changed rating from 4 to five stars. Bluetooth audio now sounds great. The problem was not the Spark mini but rather a codec issue. If you're playing audio from a late model, Android phone. (I have a pixel 6)) then you need to go into your settings and turn on "disable Bluetooth A2DP hardware offload". You can Google how to do this. It's not that difficult. Once done, you will get crisp clear audio on the spark mini and on any other Bluetooth devices that use the SBC codec.

Finally! A small, rechargeable amp that sounds great for bass and guitar! It makes me a little nostalgic for my classic “Pig Nose” from the 90’s, but I like the Vai Mini even better. What makes it a stand-out for many is its ability to connect to a vast library of FX through the app, but I really like having Vai’s 4 preset tones! It’s so much easier to dial in and start playing due to the physical knob and desirable presets (all 4 sound good), versus the other offerings from the Spark series that I felt required a more tedious routine. I can quickly layer or tweak from the presets, but it usually isn’t necessary. Build quality seems robust, and IMHO the aesthetics are fantastic.

Before I bought this, I watched nearly countless review videos to build a general opinion. When I bought and received this product, I got to admit I am very impressed. It's easy to use and packed with MANY features that can be used in a multitude of ways with a bit of creativity.Given the small size and built in battery, it doesn't generate much power drain if energy usage is your thing. It can become very loud and very quiet. There's also a 3.5mm headphone jack in case you don't want to blare the speakers, perfect for exploring the sounds and how to adapt them to your skill level.I personally like the fact that I don't need to lug around a bunch of cables and pedals to generate a neat effect on the guitar. There is a wireless pedal that compliments this product, which I will be investing in later down the road.I DID run into one MAJOR PROBLEM, though. And I feel the need to echo it and my findings here:I had been experiencing the Spark app crashing on my phone after a few minutes of playing with it. It really killed my experience and I nearly formed a poor opinion about the PositiveGrid group. I am happy to report that this experience is a unique issue that happens on "high end" phones that have a refresh rate above 60fps (e.g., if you have a 120 Hz "smooth display"). Apparently the devs of the app didn't consider that their app would run above 60fps, which causes the app to crash. While PositiveGrid [hopefully] works on this, the best workaround is to enable "power saving mode" on your phone, which would likely lock your phones refresh rate at 60fps, allowing a crash-free experience. After learning this, I haven't had a single issue with my experience with this product and it's proprietary app.This is a great product if you enjoy guitar playing or if you know someone who likes to play the guitar but YOU, yourself, know little about guitars.

Wow, this little amp is extremely portable and a ton of fun to use. The battery life is impressive and the sound is surprisingly awesome. The app is solid too. The ux experience on the app is quite straightforward and there are so many emulated pedal and amp sounds. Mixing in the Bluetooth speaker for playing along with the song of your choice tied in with the portability of not needing to have a power cord plugged in… again is so much fun. If you’ve ever been someone to play an acoustic guitar on the couch while hanging out or watching tv etc… now you can easily bring an electric and have good sounds without a big hassle of a heavy amp. I like plugging in via my wireless inputs to be even more portable. I tried the Go (smaller amp version from this brand) and the mini is light years better. I know the Go is smaller but… it buzzes at low volumes and is closer to a toy than an amp. The Mini… it’s small too but this thing sounds great, it’s an amp!!