Home Audio » Network Amplifiers » The Director M Series THE DIRECTOR® M SERIES The Director® Model M6800 16 CHANNEL DSP MATRIX AMPLIFIER VIEW MODEL M6800 The Director® Model M4840 8 CHANNEL DSP MATRIX AMPLIFIER VIEW MODEL M4840 The Director® Model M6400 16 CHANNEL DSP MATRIX AMPLIFIER VIEW MODEL M6400 The Director® Model M4800 8 CHANNEL DSP MATRIX AMPLIFIER VIEW MODEL M4800