Having had an opportunity to test Sony STR-ZA2100ES vs Marantz SR5012, I’d like to share my impression here to facilitate your choice of a new AV receiver.
AV receivers under review have the same number of channels. In terms of power, there are differences, the STR-ZA2100ES has such a ratio W/Ohm - 75/8, 95/6, while the SR5012 has a power of 100/8. The value of total harmonic distortion is also different, and for the STR-ZA2100ES it is 0.09%, but for the SR5012 it is 0.08%. Each of the compared opponents supports Bi-amping. Both Sony STR-ZA2100ES and Marantz SR5012 can transmit an audio signal directly to the amplifier and bypasses any DSP processing. Each of the receivers has a Bluetooth connector. The SR5012 has access to the Spotify service. 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 STR-ZA2100ES and the SR5012. Each of the devices can increase the resolution of the incoming video signal. Each of the participants of the comparison has a Dolby Vision.
The number of HDMI inputs/outputs varies depending on the receiver, the STR-ZA2100ES has 6/2, and the SR5012 has 8/2. HDMI Audio Return Channel is implemented in both devices. HDMI eARC is only supported by the STR-ZA2100ES. When comparing receivers, it becomes clear that each of the rivals can work with HDMI CEC. STR-ZA2100ES and SR5012 support the standard HDCP 2.2. Unlike most receivers, our models do not have a built-in phono stage for connecting a vinyl player.
Ability to create 2 Multi zones inherent in both AV receivers. There is an ECO mode in SR5012. The Sony STR-ZA2100ES and the Marantz SR5012 can be properly configured using the setup assistant.
A Dolby Atmos multichannel audio format is available both models. A DTS:X surround technology is supported by devices from our comparison.