Hi I have quite a few guitar multi effects which I run in my studio, ie Ampero stomp, Pod go, Mooer GS100. which I'm really happy with. I'm looking for a mini practice amp to use primarilly with headphones away from a studio environment but it must be versatile and good quality, i've been looking at the valeton GP-5, the Spark go or the Sonicake Pocketmaster. Can anyone add to this or recomend a better unit. TIA

 

Positive Grid Spark Go
https://www.positivegrid.com/products/spark-go?variant=47523399467168

 

I have the original Yamaha THR 10, sitting under my monitor in front of me right now. It's a great little amp with the bonus that it's also a very good aux. amp. Built-in USB audio device too. This video is very good...

 

Have a look at Nux they make a few small amps. The "Mighty lite bt mkII" and the "Mighty space" you can use your own IRs, both can be used as audio interface via USB-C. The Mighty air is also good although its a bit older.

 

Hughes & Kettner's Spirit Nano series mini amps might be interesting to you:

 

Main restriction is SIZE
Small amp = small speaker

I can get a good sound with Celestion Super 8 (or clone) speaker.
But smaller ... pure crap.

I use now a NANO Vypyr + portable multi FX (iphone or GP5 ...)
Once again, anything smaller than 8 inch will crap out, whatever the signal quality in itself.

If you don't want speaker but headphones, Valeton GP5 is the best option (i just ordered one :D )
Sonicake pocket master NAM conversion is very bad (frequency response s*cks) compared to GP5.

I use sometimes iphone alone + Irig HD 2 (used) and plethora of free/cheap amp sims, with headphone.