Splitting to two bass amps

What amps do you have? Most amps have a hardwired through output. Otherwise a basic xlr splitter will work.

If you dont need separate level control, and your amps have parallel trs plug and xlr inputs, you can just link out of either one..... use xlr input, then use a trs/trs or trs/xlrm jumper cable to the next amp. No need for a splitter. Does the same thing as a dedicated y cable. 

Two of these should do you.