Onkyo has released an upgrade to its TX-SR605, HDMI 1.3a home theater receiver with the announcement of the TX-SR606, while still keeping the price under $600. This new model comes similar to the original but with two more HDMI inputs added in which bring the total to four. They’ve also added in 1080i video upscaling, Audyssey’s new Dynamic EQ loudness compensation technology and the companies new Music Optimizer.

This is an impressive set up for the price, allowing four high-definition video inputs each with high-def 7.1-channel surround sound, and will also convert non-high-def signals up to 1080i. Aside from the new add-ons, the TX-SR606 receiver comes equipped with a 90 watt-per-channel amp, Remote Interactive HDMI control, has a number of surround sound codecs and is equipped to handle Sirius Satellite Radio.

Onko says the TX-SR606 is expected to be available in April in either a black or silver finish with very reasonable a retail price of $579.

Onkyo TX-SR606