Softron on Twitter: "For 4K multichannel ingest on the iMac Pro, a Sonnet expansion chassis Echo Express SE III with 2 x Decklink 4K Extreme 12G works beautifully. @SonnetTech @Blackmagic_BMD https://t.co/PDhabZhGI8" /
Sonnet Technologies Echo Express SE I Single PCIe Slot, Thunderbolt 3 Expansion Chassis | Sweetwater