PPX48-NL4MP - 3RU 48 Port 4 Pole Speakon Patch Panel

Rear terminals are 3/16" male spade connectors for soldering.
As an alternative to soldering you could use crimp female disconnects, found HERE

Panel Specs & Info
Height x Width3RU (5.219") x 19"
19" Rack Mountable?Yes
23" Rack Mountable?Yes - with Rack Ear Extender Kit
19" Hinged Wall Bracket Mountable?Yes - with Hinged Wall Bracket
Old Stock Number?PP4SPK48

PPX48-NL4MP Front View

Front

PPX48-NL4MP Rear View

Rear