The MA-909 is a breakthrough in the traditional designing concept of wireless PA systems. This new integrated high-fidelity wireless interlinking amplifier system separates the control mixer from any amplified speaker system unlike the traditional concept of portable "all-in-one" wireless amplifier which consists of CD/cassette players, wireless receiver, and control mixer inside the speaker cabinet. The mixed audio signals from the MA-909 can be transmitted wirelessly to inter-linking receiver modules installed in one or more remote active speaker systems, thus allowing the mixer to be set up in any desired location without the need for bulky and inconvenient connecting cables. The MA-909 wireless mixer combines the convenience of a small PA system with the power of a conventional wired sound system, providing flexibility that was simply not available before.