On Order. 45 Day Lowest Price - 100% Satisfaction Guarantee. Bi-amplified monitor speaker, 40 watts, 5inLF, 28 watts, 1in tweeter. High quality, powered monitors have traditionally demanded premium prices. The new MSP5A biamplified monitor speakers from Yamaha deliver extraordinary sound quality, at an equally attractive price! The MSP5A provides the perfect choice for a wide range of applications, from home recording to post production. Sold Individually.