Impulse Responses play an important parts when it comes to going ampless, as it gives you that cabinet sound to complete your tone quest. Each of the included amps on the METAL CORE DELUXE MKII have a matching IR to go sonically along with it.
You can load your own favorite 3rd party IRs via the MetalCore editing software. Please visit the product page and download the editor (METAL CORE DELUXE MKII supports 512 samples IR resolution.). The MetalCore editing software will convert the IR file automatically, just make sure that your IR file is in WAV format.