100 watts is great, 150 watts may be too loud for some, and there is higher watt amplifiers made.
1000 watts is not twice as loud as 500 watts, that is the first myth to break. But 1000 watts will sound superior because of something called headroom. The best way to think of it is in relation to room size. 1000 watts will not rock Glastonbury but it will do serious damage in a pub or medium to large hall.
How loud or how many watts it has.
2 Watts RMS (it has only a 5 inch speaker, but for home practice, it's easily loud enough)
The loudness of 12 watts depends on the speaker or device it is powering. Typically, 12 watts can produce sound levels ranging from quiet to moderate, suitable for personal listening or a small room. For larger environments or louder sound, higher wattage may be required.
It takes 40000 watts on a 40 degree wash and a 30 degree wash takes 30000 watts of energy.
A monster amplifier is about 500 watts, which means the amplifier is louder than most.
29% of 30000 = 29% * 30000 = 0.29 * 30000 = 8700
2% of 30000 = 2% * 30000 = 0.02 * 30000 = 600
7 % of 30000 = 7/100 * 30000 = 0.07 * 30000 = 2100
30% of 30000= 30% * 30000= 0.30 * 30000= 9000
30000