I'm going to assemble portable speaker system, think street musician or small open-air party. It needs to run for 2 hours. 100W-rated RMS speaker is enough from my experience, from same experience it can run that long with required loudness from small bike battery, someth. like 10Ah. Given that lead battery is unlikely to discharge more than 50% of its capacity - I understand that 60 watt-hours is how much energy I need for a gig.
I'm not going to use DC-AC invertor, I'm either modifying powered speaker to run on 12V power, or would get car amplifier.
My question is -- would 1.5A that I can get from power bank be enough to power the speaker, particularly at peak loads, when the base gets loud.
If not, is there a way to work around it -- like putting high-capacity capacitor in the power line, or stacking 2 powerbanks.