Onkyo today introduced a new 5.2-channel AV receiver that brings a robust slate of future-ready features to system builders for only $399. The least expensive AVR in Onkyo’s lineup, the TX-SR3100 supports HDMI 2.1 connectivity and accommodates a range of video resolutions and refresh rates, including 8K60 and 4K120, in addition to the preferred Dolby Vision and HDR10+ dynamic HDR formats.