The AudioControl Concert AVR-6 and AVR-8 are home theatre receivers capable of handling UHD/4K resolutions (3840x2160) with 3D support, 7 HDMI inputs and 2 ARC-compatible HDMI outputs, among other connection options.
The AVR-8 features an amp with 200W per channel, while the AVR-6 offers 100W per channel. Both output at 8 ohms, and can be configured as either a full 7.1 system or a 5.1 system with 2 channels serving a second zone.