The Universal Audio Apollo x4 Thunderbolt is an exceptional device that allows you to record with elite level A/D and D/A conversion - thanks to four Unison-enabled preamps. These amazing preamps work brilliantly with the QUAD Core realtime plug-in processing. This Heritage Edition version comes complete with ten additional award-winning UAD plugins (worth over 2400 USD) for added processing power (see below for more info). The onboard preamps enable you to use the range of Universal Audios plugins during the recording stage. Meaning you can add digital preamp emulation or compression at the recording stage of your workflow. All of this amazing technology is housed in the super sleek case and connectivity is provided by Thunderbolt 3 - for ultra-fast communication.