The Onkyo TX-SR806 is a 7 x 180w multichannel, THX Ultra2 Plus multichannel receiver with onboard decoding for Dolby TrueHD and DTS-HD Master.
The less powerful TX-SR706 has THX Select2 and has a power handling of 7 x 160w, plus decoding for Dolby TrueHD and DTS-HD Master.
The TX-SR806 has five HDMI 1.3a inputs and the SR706’s has four. Both models get 192Khz/24-bit Cirrus Logic DACs for all channels, and twin Texas Instruments Aureus 32-bit DSP chips for digital audio processing.