Onkyo TX-NR545 vs Onkyo TX-NR757 – that is a question.
AV receivers under review have the same number of channels. In terms of power, there are differences, the TX-NR545 has such a ratio W/Ohm - 100/6, while the TX-NR757 has a power of 110/8, 180/6. A common feature for devices is the same total harmonic distortion - 0.08%.
The manufacturer installed different DACs, the TX-NR545 received the model Hi-Grade 384 KHz/32-bit, but the TX-NR757 is equipped with AK4458 384 KHz/32-bit. Each of the compared opponents supports Bi-amping. Both Onkyo TX-NR545 and Onkyo TX-NR757 can transmit an audio signal directly to the amplifier and bypasses any DSP processing. Each of the receivers has a Bluetooth connector. Both devices can work with such Apple Music services: AirPlay. Access to the Spotify service is on each of the competitors. The number of available streaming services varies for receivers, the Onkyo TX-NR545 works with Tunein Radio, but the Onkyo TX-NR757 works with Deezer, TIDAL, Pandora.
Support for the HDR function can only boast of each of the AV receivers. The quality of 4K/60Hz signal remains unchanged when transmitting from a source to a TV or projector via HDMI for both receivers. Signaling over HDMI in standby mode can provide the TX-NR545 and the TX-NR757. None of the devices can increase the resolution of the incoming video signal. Operation with the Dolby Vision is only possible with the TX-NR757.
The number of HDMI inputs/outputs varies depending on the receiver, the TX-NR545 has 6/1, and the TX-NR757 has 8/2. HDMI Audio Return Channel is implemented in both devices. HDMI eARC is not supported by the TX-NR545 and the TX-NR757. When comparing receivers, it becomes clear that only the Onkyo TX-NR545 has HDMI CEC. TX-NR545 and TX-NR757 support the standard HDCP 2.2. In the presence of a built-in phono stage for connecting a vinyl player only at Onkyo TX-NR757.
Ability to create 2 Multi zones inherent in both AV receivers. Voice control of the basic functions of the receiver is not realized in both models. There is an ECO mode in neither AV receiver. The Onkyo TX-NR545 and the Onkyo TX-NR757 can be properly configured using the setup assistant.
A Dolby Atmos multichannel audio format is available both models. Only in the TX-NR757 realized a DTS:X surround technology.