The PX3000 can be half-normal
"NORMAL" inserts interconnect the two rear jacks of one channel, while inserting a plug into one of the front jacks interrupts the connection of the rear jacks. "THRU" facilitates connection of each rear connector with its corresponding front connector. "HALF NORMAL" interconnects the two rear jacks of one channel and inserting a plug into the lower front connector interrupts the connection of the rear connectors.
Like all BEHRINGER products, it's pretty competitively prices - ok, it's a snip at $69.99