Using battery power to go off the City's power grid

Viber,

The bass using the Goal Zero Yeti 400 is looser but not fuller...there is the same exact amount of bass as with the wall. It has relatively high output impedance compared to big inverters so makes sense that bass would be affected negativiely (sounds slower). You seem to have one opinion of everything....."something is either detailed, tight and accurate or its loose bloated and slow". This is far, far from the truth of things. There are a million shades of grey and many sonic factors are independent of each other. You can have loose bass that is less, the same or more than tight bass.....tight bass can be small, medium or large and full....yes, listen to some bass playing live......depending on the room, instrument, whether it is amplified or not....bass can have infintie descriptions. IT IS NOT ONE WAY......expand your mind.......it it infinite.....However, we ARE ONE......but many are the ways and names.

Actually, live unamplified bass in the appropriately sized room or hall is delightful because of the many harmonic overtones which go up to HF.  Take a French horn which has bass, although not as deep as a tuba.  James Boyk has an essay called "Life above 20 kHz" or something like that.  He showed that the French horn has significant energy up to 9 kHz.  When you hear the French horn up close, it has tightness of bass, as well as midrange/HF.  Bass by itself isn't tight, but the perceived tightness is from the much higher freq overtones integrated into the total sound of the instrument.  

Bass instruments in various sized rooms have different tonal balances.  The large piano in a small room sounds awful, because the walls reinforce the bass more than higher freq, creating a bass dominant heavy sound.  The same piano on a large concert stage sounds lighter in tonal balance, with less perceived bass than in the small room.

The Goal Zero 400 is a special case where the high impedance is another factor to its detriment of bass.  Perhaps larger inverters with lower output impedance is a big factor in explaining their superior sound.  But impedance is only one factor.  We can look up the impedance of the larger Yeti 3000, and compare to Giandel 2200 and 5000.  There are probably other factors responsible for the superior sound of the Giandels, and whether the G 5000 is superior to the G 2200.  Any of these units are a tiny fraction of the Stromtanks, so that's why I am going for the G 5000 which your friend vouches for.

There are no specs for any inverters output impedance.....don't make stuff up...,..just listen and report what you hear......this is what we all want....real knowledge.

OK, used the Bluetti on the amp (that draws 35 watts at idle).........the bass was a little better than the Goal Zero but the imaging was not nearly as real.....you can see the space of the recording venue and each instrument is in its own space more with the Goal Zero......The Goal Zero sounds a little soft......the Bluetti sounds more like the zippy wall sound. When listening with the Goal Zero you want to turn it up 2 db and then it is goosebump heaven. time The Bluetti is sitting on the floor and the Goal Zero up on some wood blocks. The Goal Zero also has a PPT AC thangy plugged into its spare AC outlet. Really the test is mostly meaningless. By having the amp plugged into the Goal Zero you are getting more noise interaction from the amp to the other components.....so, I should have a second Goal Zero just for the amp to be fair....and also a PPT thang plugged into the Bluetti and also have it off the floor.....everything makes a difference.....But, I will say I did not want to go back to the Bluetti after hearing the Goal Zero again......If this baby denuded Goal Zero sounds this good what the heck does a 5000 watt Giandell sound like? I want to know.....Maybe I will start a go fund me page and you guys can buy me one.....he he.

The Bluetti I have here is the AC200P not the AC 300 which is an inverter with out battery......this one has the battery.