did an A-B comparison between the Yamaha and another PA system that is just cobbled together in my garage,using one very cheap microphone and another one of a good name but still dubious quality for vocals and 12 string guitar.

The Yamaha hands down beat the other system, by virtue of well-matched high quality components and Bi-Amped power

Sound quality is not good

Best quality for speakers in its class

The audio quality is amazing even at high volumes

quality is excellent

Great speakers for any even, 2 speakers can handle gatherings of up to about 150 people outdoors, around 250 to 300 indoors without losing any quality

Solid build quality and sounds amazing

To be fair its a good speaker but if you want TRULY great quality as a performer I would avoid the B series.