The owner of the property I live on has a Bluetti AC300 that is about 25 feet from me right now......so, he is going to bring it in sometime soon and I will a/b with my Goal Zero Yeti 400. The only thing the Goal Zero does negative is that the bass is not as good as the wall AC (when I run the amp on it). This makes sense as the output impedance of such a small inverter is not very low. If the Bluetti sounds in the league with the Goal Zero but has better bass....that is nice. However, my friend with the Giandel system first started with a Goal Zero Yeti 3000 which was sonically surpassed by the EcoFlo pro......which was then completely blown away by the Gaindel 5000/2 200 amp hour LIfePo4 system he has now. My guess is that any all in one will not perform at the level of a great separate inverter.......we shall see....errr hear.
BTW.....the PS Audio Regenerators do not use an inverter......they take the AC wall power and convert it to DC just like any power amp....and then create a sine wave and amplify the sine wave with an AMPLIFIER.......same as any amp running on AC..
Purepower regenerators do use an inverter.......but run off the wall AC......they convert to DC and then back to AC via the inverter.......PS Audio uses a power amp.