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[https://images-na.ssl-images-amazon.com/images/I/31U53n4edyL.jpg]View larger THX Theater-Reference sound meets Ultra HD entertainment Step up to THX-certified surround sound with the TX-NR737—the most potent and future-ready A/V receiver in its class. With a high- current massive transformer, discrete Three-Stage Inverted Darlington Circuitry amplification, and extremely robust construction, this heavyweight serves up floorshaking theater-reference sound. There are 4K/60 Hz-capable HDMI inputs for Ultra HD gaming and video at 60 fps, as well as support for HDCP 2.2. As most Hollywood movie studios are adopting HDCP 2.2 copy protection for future Full HD and 4K releases (including content streamed via the internet), this is a highly desirable feature. Also included is QdeoTM 4K upscaling technology so you can enjoy older DVDs and games in high resolution. Music lovers can choose from a selection of internet music services and stream almost any 192/24 hi-res, lossless, or compressed file format (including 5.6 MHz DSD) from compatible network- attached devices using built-in Wi-Fi and our free remote app. Bluetooth is also standard. Combining these features with class-leading sound quality and an easy-to-use GUI, the TX-NR737 delivers powerful studio-master entertainment at an affordable price. Customized audio parts WRAT (Wide Range Amplifier Technology) is based on high-current, low-impedance architecture. High instantaneous current realizes ultimate control of the speaker drivers for accurate and musical audio reproduction, from the most delicate piano passages the thunderous roar of an orchestra in full flight. High current better handles impedance fluctuations from the speakers (which can dramatically increase the load on the receiver), and with 125 Watts/Ch (6ohms 1kHz, 2 Channels Driven, FTC) there is always enough power to respond instantly to dynamic gains in movie soundtracks and music. High-current, low-distortion amplification for supremely good sound To achieve best-in-class current delivery, the TX-NR737 is built around a custom high-output transformer, extra-large customized capacitors, and low impedance copper bus-plates. Three-Stage Inverted Darlington Circuitry amplifiers feature a discrete low-impedance output stage with high-current transistors for instantaneous power and extremely low distortion. Unlike some A/V receivers, the audio and video processors, DAC section, networking, pre-amp, amplifiers, and power supply are all separated to minimize electrical interference (noise) on audio signals. The culmination of over 60 years’ audio engineering experience, WRAT preserves the life and character of the master recording while guaranteeing an emotionally moving experience whether you’re listening to compressed digital music, a treasured LP, or a hi-res movie soundtrack. Dolby Atmos in Onkyo [https://images-na.ssl-images-amazon.com/images/G/01/aplusautomation/vendorimagesDolby_Atmos_Logo-500._CB329365079_.jpg]Firmware upgrade available now Dolby Atmos multidimensional sound Onkyo is among the first to introduce the exciting Dolby Atmos surround-sound format to home theater environments. Dolby Atmos uses object-oriented mixing to layer independent audio elements through discrete channels, moving three-dimensional sound effects around the theater with astonishing realism. The format adapts to any home theater layout incorporating height channels for a more enveloping soundfield with extremely accurate directional and overhead effects. [https://images-na.ssl-images-amazon.com/images/I/215yfpkPL6L.jpg]Ready for next-generation Ultra HD entertainment HDMI 2.0 for 4K video at 60 fps Five of the receiver’s seven HDMI inputs are based on the latest HDMI specification to support 4K video at 50/60 frames per second and 21:9 aspect ratio for theater-reference movie display. Now you can add thunderous 7.2-channel surround-sound to blockbuster 4K 50/60 Hz games and movies for a breathtakingly realistic entertainment experience. The TX-NR737 also supports the latest HDCP 2.2 DRM copy protection standard via HDMI Input 3 and the main output. [https://images-na.ssl-images-amazon.com/images/I/11D9wk7RG+L.jpg]View larger Reference-level sound in your home THX certification guarantees the same high-volume, low-distortion sound of a commercial multiplex theater in your own listening space, with high-resolution studio-master soundtracks reproduced precisely as the director intended. Your TX-NR737 Network A/V Receiver has passed more than 2,000 laboratory bench tests across 75 categories and covering 14,000 individual data points to ensure that every aspect of audio performance meets rigorous THX standards for theater-reference sound. THX Select2 Plus is recommended for medium-sized rooms where the screen-to-seat viewing distance is about 3–4 meters (10–12 feet). [https://images-na.ssl-images-amazon.com/images/I/21omws7CipL.jpg]Universal support for wireless audio streaming Wi-Fi and bluetooth inside The TX-NR737 has Wi-Fi and Bluetooth technology built in. For network audio, use the remote app to stream music stored on your smartphone and to locate and stream hi-res audio from any network-attached DLNA-certified device (such as a PC or NAS). There are no hidden adapter costs, no need for close proximity to an Ethernet wall socket, and no long runs of unsightly cable just to enjoy a stable network connection. The receiver also has Bluetooth 2.1 + EDR on board. Pair up and stream whatever audio is playing on your compatible device, from MP3s to albums on YouTube. Audio streamed via Bluetooth is enhanced with Onkyo’s Advanced Music Optimizer, a DSP mode that restores compressed files to close to their original fidelity for beautifully full and natural sound. [https://images-na.ssl-images-amazon.com/images/I/21vG2LVYzLL.jpg] Making high-resolution audio easy for everyone Onkyo A/V receivers are engineered for universal hi-res compatibility and ease of use. It’s now remarkably easy to enjoy albums mastered in high-resolution that you’ve downloaded and stored on your computer or media server. The remote app very quickly locates the 192/24 and 96/24 high-resolution audio files on your network-attached storage devices and sends them via DLNA to the receiver with zero loss in quality. Almost every hi-res and lossless format is supported, from gapless FLAC and WAV to ALAC and WMA. The TX-NR737 also handles 5.6 MHz DSD and Dolby TrueHD formats for the ultimate in depth and clarity. With surpassing DSP power, high-quality TI Burr-Brown D/A conversion, and Onkyo’s low-distortion amplification, hi-res music on your home theater is not only easy to enjoy, it sounds absolutely fantastic as well. [https://images-na.ssl-images-amazon.com/images/I/11-MtxQskLL.jpg] AccuEQ room calibration To showcase the unique acoustical characteristics of your front loudspeakers, AccuEQ bypasses the front two channels so you can enjoy authentic hi-fi audio quality for stereo music, with no DSP correction applied. Instead, the included microphone measures the distances, crossovers, and output levels of the surround and center speakers from one easy listening position, which speeds up and simplifies the calibration process.