Both monitors scale 1280x720 and 1920x1080 without issue
PS3:
Go to Settings>Display Settings>Scroll down and select RGB Full Range (HDMI)
Go to Settings>Video Settings>Scroll down and select 1080p 24hz Output Automatic.
To use external audio devices use the 3.5mm audio in & out ports located on the back of the Crossover or use the included Playstation 3's RCA cord:
Or insert an optical cord into the optical out port located at the back of the PS3 or 4 to connect the PS3 or 4 to an external device such as a DAC.
PS4:
Go to Settings>Scroll down and select Sound and Screen>Video Output Settings>Resolution: 1080p>
RGB Range: Full
Go to Settings>Video Playback Settings and set Output at 1080p/24hz to Automatic.