Onkyo TX-NR757 has 8 in and 2 out HDMI ports that can to generate a 4K 60Hz video signal. It supports 7.2 channel setup with the power of 180 W per channel. It can play compressed and lossless formats. Built-in Bluetooth and Wi-Fi modules let you access various music services like Pandora and Spotify as well as internet radio stations. Onkyo TX-NR757 is THX-certified, which means that the quality of the output audio signal is the same as the audio signal in commercial theaters. Also, the audio source can be connected to the receiver via FireConnect. Speakers can be connected wireless as well. The second zone can be used with a 5.1.2 configuration and you cannot bi-amp the front speakers.
Onkyo TX-RZ710 supports a 7.2 channel setup with the power of 110W per channel. It has a built-in AccuEQ auto-calibration system that tunes the speakers automatically. Onkyo TX-RZ710 is THX certified which means that the sound quality is equal to the sound quality of commercial cinemas. The receiver supports 4K 60 Hz with HDCP 2.2 copy protection and HDR, which can to guarantee a high-quality video signal. Dolby Atmos and DTS:X can generate clear and rich sound. It also has technologies that exclude any distortion or phase shifting. The device has Wi-Fi and Bluetooth modules that let you access Spotify and other services.
To compare Onkyo TX-NR757 vs TX-RZ710, we need to pay attention to different aspects. One of them is the total power output - 560 W Onkyo TX-RZ710 vs Onkyo TX-NR757 that has 750 W. However, there are other advantages and disadvantages.
The advantage of Onkyo TX-NR757 has many technologies. Its main disadvantage is that it has some compatibility issues.
The main advantage of Onkyo TX-RZ710 is that it has many decoders that can to generate a high-quality output signal. The main disadvantage is the issue with HDMI ports.
If we make a comparison chart of Onkyo TX-RZ710 vs TX-NR757, then we see that the receivers have many common features, so if you need more power, then TX-NR757 is for you, but if you need a device that has many great built-in features, then Onkyo TX-RZ710 is perfect for you.
Onkyo TX-NR757 overview
Onkyo TX-RZ710 overview
The best receiver is Onkyo TX-RZ710. Check Onkyo TX-RZ710 price at Amazon