4K x 2K resolution, usually referred to as simply "4K Ultra HD", is the latest high definition video display format, with four times the resoultion of 1080p. The Pioneer VSX-1123-K, VSX-1023-K, VSX-823-K, and VSX-523-K are ready to pass through 4K Ultra HD video signals to a compatible display, meaning it can support home theater systems dedicated to producing the highest quality picture available today.

Smartphones have become a convenient and powerful way to stay connected to your favorite entertainment. Pioneer's new networked receivers give instant access to your favorite content and control options through smartphones and tablets.

Apple^®'s AirPlay music streaming technology allows you to wirelessly stream music from your iPhone^®, iPod^® or iTunes^®-running Mac^® computer or PC directly to the receiver. Pioneer is the only receiver brand with HTC Connect™, the only unified approach for the Android™ platform for streaming music wirelessly from select compatible HTC smartphones. HTC Connect makes it easy to wireless stream your favorite music to your receiver – there is no need for a separate app, HTC Connect is built right onto your phone's music player.