The number of watts that you will need
depends on a number of factors including your style of
music, the size of the venue, the location (indoors or out) and
the number of people in the audience (bodies absorb sound!).
Although technically (all things being
equal) if you double the number of Watts you double the sound
pressure level (SPL), our ears don't necessarily perceive the
volume as twice as loud. The reasons for this are quite
complicated but as a general rule, doubling the number of Watts
increases perceived volume by around 30%.
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