In a word,maybe. But likely not.
The 12vdc battery has, according to your specs, 33ah capacity.
When you convert this to 120vac via the inverter, this gives 3.3 amp/hour capacity at the needed line voltage for the receiver.
If the receiver is a 30wpc, and requires more than its output to drive, then it will be around 100w to run. If you don't turn it up too loud, and it only draws maybe 60 watts, then you might have a chance.
If it draws only about 60 watts at the volume you decide to play at, that would be only about 1/2 and amp at 120vac, so you might get about 3 hours out of it before the voltage drops too low in the battery.
But your other problem will be that the inverter you have is probably a modified sinewave type, which will put all kinds of hash and noise on the line, which will come out the speakers.
I'd try a "dry run" first,in your home, to see if it will work out the way you want.
The 12vdc battery has, according to your specs, 33ah capacity.
When you convert this to 120vac via the inverter, this gives 3.3 amp/hour capacity at the needed line voltage for the receiver.
If the receiver is a 30wpc, and requires more than its output to drive, then it will be around 100w to run. If you don't turn it up too loud, and it only draws maybe 60 watts, then you might have a chance.
If it draws only about 60 watts at the volume you decide to play at, that would be only about 1/2 and amp at 120vac, so you might get about 3 hours out of it before the voltage drops too low in the battery.
But your other problem will be that the inverter you have is probably a modified sinewave type, which will put all kinds of hash and noise on the line, which will come out the speakers.
I'd try a "dry run" first,in your home, to see if it will work out the way you want.