MSR Series

Powered speakers offer many advantages over their passive counterparts, whether used on the road or in permanent installations. You don’t need separate amplifiers or the extra cables and connections required, so setup is fast and easy while reliability is significantly improved. The ability to plug directly into the speaker inputs can eliminate an entire rack of amplifiers in a modest-size system. But the benefits go beyond mere convenience. Optimum matching of amplifiers and speakers involves much more than simple impedance figures, and can be a formidable engineering task given the vast number of choices available. The Yamaha MSR-series power amplifiers have been ideally mated to their respective speakers in every way possible, delivering reproduction quality that only the most stringent matching can achieve. There are also a significant number of Yamaha refinements that put these extraordinary powered speakers in a class of their own, including an original cabinet design that eliminates internal standing waves and ferrofluidcooled voice coils for superior stability and linearity.

The MSR400 employs a two-way bi-amplified system in which the low-frequency and high-frequency drivers have their own dedicated amplifiers. The 12-inch cone type woofer and the 1.75-inch high-frequency horn driver deliver total output power of up to 400 watts (LF: 300 watts, HF: 100 watts burst; 300 watts continuous total).

The MSR400 provides three input connectors; XLR-3-31, XLR-3-32, and phone jacks. All inputs are balanced and connected in parallel. The input level range is from -36 dB to +4 dB, allowing the MSR400 to accept output from your mixer as well as other sources such as microphones, synthesizers, or other electronic musical instrument. The control section includes input level adjustment and a two-band equalizer so you can make fine adjustments for optimum matching with your input source.

The MSR400 can be mounted and positioned in a number of ways to meet the needs of venues or events. It can be placed vertically on the floor, used as a stage monitor, or even mounted on a speaker stand for improved projection. The top surface of the cabinet provides 8-mm threaded holes that facilitate wall or ceiling mounting.

In addition to the green LED that lights when the power is turned on, there's a peak LED that lights red when an input overload occurs. This provides a visual indication of excessive input, allowing you to adjust the input level appropriately.