Marantz SR7009 | 9.2 Network AV Receiver wtih Atmos (Certified Refurbished) This Certified Refurbished product is tested & certified by Marantz to look and work likenew. The product includes all original accessories, and is backed by a 1 warranty. The new SR7009 holds the same big feature set as the SR6009, but goes even beyond it with more unique sound technologies. It comes with no less than nine discrete amplifier channels, each with 125W of pure power. With Dolby Atmos, sound comes alive from all directions, including overhead, to fill the home theater with astonishing clarity, power, detail, and depth. The SR7009 has the processing power to run a more enveloping, 7, 9 or 11 channel Dolby Atmos layout using 5.1.2, 5.1.4, 7.1.2, 7.1.4* or 9.1.2* configurations utilizing ceiling mounted, or Dolby Atmosenabled speakers. 3D stands for 3 dimensional. Products carrying the 3D logo are able to output or path through the digital 3D video signal. DTS-HD Master Audio is an optional High Definition Audio format for all Blu-ray DiscTM products. DTS-HD Master Audio format allows a bit-to-bit representation of the original movie's studio master soundtrack and delivers audio at high constant bit rates superior to standard DVDs.