THE RANGE 12, 16, 24 and 32 channel models. GL2000-412 10 mono, 2 stereo, 4 groups, 6 aux, 2 stereo returns, L,R, Mono sum GL2000-416 14 mono, 2 stereo, 4 groups, 6 aux, 2 stereo returns, L,R, Mono sum GL2000-424 22 mono, 2 stereo, 4 groups, 6 aux, 2 stereo returns, L,R, Mono sum GL2000-432 30 mono, 2 stereo, 4 groups, 6 aux, 2 stereo returns, L,R, Mono sum Optional SYS-LINK buss expander system GL2000-SL1 One kit required per console. User to source interconnecting cables. DIMENSIONS GL2000-412 .