Twelve of Denon and Marantz’s HDMI 2.1 receivers are affected by a compatibility issue that prevents them from properly passing 4K/120 Hz and 8K/60 Hz content from Microsoft’s flagship console, the Xbox Series X. A fix has now arrived in the form of an HDMI adapter kit called the SPK618, which corrects the problem by delivering corrected HDMI data to the receivers. While the solution is an unsightly one that requires its own AC adapter, affected users can receive the SPK618 at no cost by registering on Denon and Marantz’s HDMI adapter sites beginning on May 15.
The SPK618 HDMI adapter solution is designed to remedy a compatibility issue between select Denon A/V receivers that support 4K/120Hz and 8K video resolutions and select gaming consoles that support 4K/120Hz and 8K video resolution output. If you experience a black screen and no audio when trying to pass through 4K/120Hz or 8K signals from gaming devices connected to the 8K input of the Denon A/V receiver, this adapter will help you to get a proper gaming experience.
Sources: Audioholics, Sound United