Denon AVR-S660H vs Marantz STEREO 70s review

vs

Having had an opportunity to test Denon AVR-S660H vs Marantz STEREO 70s, I’d like to share my impression here to facilitate your choice of a new AV receiver.

Amplifier

The number of channels for receivers is different - 5.2 versus 2.2, respectively, for devices. In terms of power, the receivers have the same performance - 75/8, 100/6. A common feature for devices is the same total harmonic distortion - 0.08%.

Audio features

Competitive models use the same DAC. The Bi-amping function is implemented only in the Marantz STEREO 70s. The model STEREO 70s can transmit an audio signal directly to the amplifier and bypasses any DSP processing.

Connectivity

These units have the same Wi-Fi modules. Each of the receivers has a Bluetooth connector. Both devices can work with such Apple Music services: AirPlay, AirPlay 2. Access to the Spotify service is on each of the competitors. The number of available streaming services varies for receivers, the Denon AVR-S660H works with Deezer, TIDAL, Pandora, SiriusXM, Napster, SoundCloud, but the Marantz STEREO 70s works with Deezer, TIDAL, Pandora, SiriusXM, Napster, SoundCloud, Amazon Music, Amazon Music HD, MOOD:Mix.

Video features

The HDR10+ function is present in each of the rivals. The quality of 4K/120Hz 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 AVR-S660H and the STEREO 70s. Each of the devices can increase the resolution of the incoming video signal. Each of the participants of the comparison has a Dolby Vision.

Extensive connections

The number of HDMI inputs/outputs varies depending on the receiver, the AVR-S660H has 6/1, and the STEREO 70s has 6/3. HDMI Audio Return Channel is implemented in both devices. HDMI eARC is only supported by the AVR-S660H. When comparing receivers, it becomes clear that each of the rivals can work with HDMI CEC. AVR-S660H and STEREO 70s support the standard HDCP 2.3. Like most receivers, our models have a built-in phono stage for connecting a vinyl player. Voice control is performed using Amazon Alexa, Google Assistant, Siri, Josh.AI in both models. There is an ECO mode in either AV receiver. The Denon AVR-S660H and the Marantz STEREO 70s can be properly configured using the setup assistant.

Multichannel surround

Generally no support for a Dolby Atmos multichannel audio format. A DTS:X surround technology is not supported by devices from our comparison.