Monitoring Sound
There are a lot of options as far as headphones, monitors, and audio interfaces are concerned. Here are a few recommendations:
Reference Headphones:
Beyerdynamic DT880 Pro Semi Open Back Reference Headphones: Amazon
Beyerdynamic DT900 Pro X Open Back Reference Headphones: Amazon
Audio Interfaces:
Focusrite Scarlet 6i6 (2nd Generation, USB): Amazon
Focusrite Saffire Pro 24 (Firewire/Thunderbolt): Amazon
Monitors:
JBL 305P MKII 5” Reference Near-Field Monitors (sold individually so you need to buy 2): B&H, Sweetwater, Amazon
KRK Rokit 5 G4 5” Reference Near-Field Monitors (sold individually so you need to buy 2): B&H, Sweetwater, Amazon
Focal Shape monitors (pricey, but excellent; sold individually so you need to buy 2): B&H, Sweetwater, Amazon