Onkyo TX-SR353 vs Harman Kardon HK 3700 – that is a question.
The number of channels for receivers is different - 5.1 versus 2.0, respectively, for devices. In terms of power, there are differences, the TX-SR353 has such a ratio W/Ohm - 140/6, while the HK 3700 has a power of 85/8. The value of total harmonic distortion is also different, and for the TX-SR353 it is 0.08%, but for the HK 3700 it is 0.07%.
Competitive models use the same DAC. None of the compared opponents supports Bi-amping. In the considered devices there is no function transmitting an audio signal directly to the amplifier and bypasses any DSP processing.
Wireless connection to the Internet via WIFI can not be performed on these receivers. Each of the receivers has a Bluetooth connector. Support for Apple Music Services not implemented. Spotify is not available for these receivers.
Oddly enough, the support for the HDR function is not implemented in these units. Based on these AV receivers, it is not possible to transmit a 4K signal from the source to the TV or projector. HDMI signal transmission in standby mode can provide only the TX-SR353. None of the devices can increase the resolution of the incoming video signal. Review participants do not have the Dolby Vision feature. HDMI Audio Return Channel is only available on Onkyo TX-SR353. HDMI eARC is not supported by the TX-SR353 and the HK 3700. When comparing receivers, it becomes clear that only the Onkyo TX-SR353 has HDMI CEC. In the presence of a built-in phono stage for connecting a vinyl player only at Harman Kardon HK 3700. Voice control of the basic functions of the receiver is not realized in both models. There is an ECO mode in neither AV receiver. None of these units can be properly configured using the setup assistant.
Generally no support for a Dolby Atmos multichannel audio format. A DTS:X surround technology is not supported by devices from our comparison.