Whirlwind SB6T11G Multichannel Passive Mic Splitter
Whirlwind

6 Channel input passive splitter with 1 parallel and 1 isolated output and ground lift on one output set.

Each channel has a Whirlwind WC3FQ female XLR input connector wired to two Whirlwind WC3MQ male XLR with 1 parallel and 1 isolated output and ground lift switch on one output set.

The boxes are built from heavy cold-rolled steel for long term abuse-resistance.