Whirlwind PB06 Pressbox - Passive, 1-line in,  6-mic out

Whirlwind PB12 Pressbox - Passive, 1-line in,  12-mic out

Whirlwind PB24 Pressbox - Passive, 1-line in,  24-mic out

Whirlwind PRESSMITE Press Box - Active, mic in, 12 mic + 2 line outs, battery or AC powered

Whirlwind PRESSPOWER 2 Press Box - Active, 2 Mics In, 16 Mic or Line Selectable outputs, battery or A/C powered, Travel Case.