Yamaha RX-A4A vs Denon AVR-S670H

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Review of Yamaha RX-A4A versus Denon AVR-S670H will reveal the best features offered by the devices. According to the results of our review, Yamaha RX-A4A received 8.7 points out of 10 possible, and Denon AVR-S670H was rated 6.8 points. The release date of RX-A4A is 2021, and AVR-S670H is 2023. RX-A4A is better suited for home theater use than the AVR-S670H. Its sound profile is better balanced.

Main advantages Yamaha RX-A4A over Denon AVR-S670H

Main advantages Denon AVR-S670H over Yamaha RX-A4A

Amplifiers

For the built-in amplifier, the devices received different marks - 8 and 6, respectively, on a 10-point scale.

The number of channels is equal to the number of possible connected speakers. The Yamaha RX-A4A supports 7.2-channels sound, but Denon AVR-S670H supports a 5.2-channels configuration.

RMS stands for the actual power of the receiver. The higher this value, the louder the sound can be produced. The differences between the models in terms of RMS power are significant - for the RX-A4A this value is 110/8 W/Ohm, and for the AVR-S670H it is 75/8 W/Ohm.

Audio features

After reviewing the audio features of each model, we can rate the RX-A4A 9 out of 10, and the AVR-S670H - 6.

Bi-amping is the amplification of one speaker with two amplifiers. This amplification method has a positive effect on sound quality. Bi-amping is possible only on the RX-A4A.

Most receivers now come with a microphone included. It is with the help of this microphone that the auto-calibration system functions, which adjusts the sound of the receiver to the room.

Speaker A/B switching allows you to change between the main and sub speaker set. Denon AVR-S670H can work with the main and additional set of speakers - and switch between them.

Connectivity

The connectivity of competitors in our comparison is markedly different, Yamaha RX-A4A scored 9, and Denon AVR-S670H scored 7 out of 10.

Bluetooth connection is now one of the main communication protocols for the receiver's control or even music broadcasting.

Streaming services

Now music streaming services are gaining more and more popularity. They allow users to listen to millions of songs by subscription.

Extensive connections

The presence of many connectors makes the receiver more versatile. But there are also narrowly targeted models, the number of connectors which are limited to a certain area of use. And when choosing their own receiver, users need to consider exactly your goals for using the receiver. For extensive connection, Yamaha RX-A4A got 8 points, but Denon AVR-S670H received 7 points.

Yamaha RX-A4A is equipped with 7/3 HDMI inputs and outputs, and Denon AVR-S670H has 6/1 HDMI inputs and outputs.

Video features

The AV receiver is the heart of the home theater. And in this case, support for all current video formats ensures the best user experience, so it is very important to consider this when choosing a device. Video features of rivals in our comparison were rated 8 out of 10.

Additional features

In terms of evaluating additional features, both receivers received a score of 10 out of 10.

Multi-room

As the center of a home media system, each multichannel receiver has an additional set of terminals for connecting the second set of speakers to create additional audio space in Zone 2 or even Zone 3 where audio can have the separate source.

Multichannel surround

Yamaha RX-A4A got 7 points for the multichannel surround sound and Denon AVR-S670H got 8.

Dolby Atmos' particularity is that this is the object-oriented sound format, that is, each audio signal object is independently sounded and connected to its spatial position. Yamaha RX-A4A can create 3D sound due to the Dolby Atmos support.

DTS:X is an algorithm used by the processor to create sound scenes, where sounds connected directly to objects rather than channels, and to determine the optimum sound output distribution in space. Surround sound with DTS:X is available only on the RX-A4A.