MLA3, M421, M88, and FM850 (McCauley) are used at the Satrop River Rock Festival. Use 24 MLA3 line array speakers, 4 M421 ultra-low speakers, 14 FM850 monitoring speakers, and 18 M88 ultra-low speakers.
MLA3 line array speaker 2x12 "+2x8"+2x3 ";
Frequency response range: 50-18KHz; Horizontal coverage angle: 90 °; Peak sound pressure level 139dB.
M421 ultra-low frequency speaker (4x21 "; frequency response range: 20-85Hz; peak sound pressure level 155dB).
M88 ultra-low frequency speaker (2x18 "; frequency response range: 35-150Hz; peak sound pressure level: 138dB).