i ran it off a sealed lead acid 12 volt cell that was putting out 13.5 volts , it was noticeably louder than off the one spot . its funny with these mini amps , most of them use tiny speakers ... they work really well on a larger one .
i modded a dano hodad like that , it has two 2 inchers stock , sounds 100 % louder with a 5 1/2 . modded the delay and the trem with pots , got a NICE lil mini amp for 30$ . i run "c" size cells out of a ryobi cordless drill pack in it . its not as loud as the stella though , but close . i think the dano is 1.5 the stella is 2 .
put it in an "acid" cigar box with a mini fan grille to cover the speaker , and a massive gem lamp with an led in it , looks retro , i call it the "modad" . we do jam sessions at the forest preserve . we ran a bass guitar thru 2 8 inch sub speakers in a kicker box with a rockford fosgate 80 watt auto amp , it worked well with the volume rolled back on the bass , ran the dum machine thru that too . pretty cool . i used a zoom bass processors line out to buffer the bass a lil , still had to turn the bass volume knob down a third though or the speakers rattled .
i got some 12 inch subs that are blown , i dont know if i could recone them for a bass guitar speaker though , that would be sweet .