Yamaha RX-A670 vs Yamaha RX-A870

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Yamaha

RX-A670


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Yamaha

RX-A870


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Basic Info
Price range
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Main features
Number of channels7 channels7 channels
RMS power80 watts100 watts
THD0.09 %0.06 %
Min. impedance6 ohms4 ohms
Connectivity
Internet
Bluetooth
Airplay
Remote app
USB - Iphone
MHL compatible
Functionalities & Surround
Tuner
Standby Pass through
Multi-room audio
Dolby DD+
Dolby Atmos
DTS:X
Inputs
HDMI inputs4 inputs8 inputs
Phono inputs
AV inputs7 inputs10 inputs
Audio inputs4 inputs6 inputs
Optical inputs12
Coaxial inputs22
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Comparison of Yamaha RX-A670 vs Yamaha RX-A870

Both AV receivers have the same number of channels of 7 and the Yamaha RX-A670 has a lower RMS power (80) compared to the Yamaha RX-A870. The Yamaha RX-A670 has a THD of 0.09 %, whereas the Yamaha RX-A870 has a THD of 0.06 %, THD being the total harmonic distortion, a measure of the difference between the incoming sound entering the receiver and the output, a lower THD being better. Morevoer, the Yamaha RX-A670 and the Yamaha RX-A870 have a minimum impedance of 6 ohms and 4 ohms respectively.

The Yamaha RX-A670 can be connected to the internet, it can connect through bluetooth, the Yamaha RX-A670 is unfortunately not MHL-compatible, and it does not have an integrated tuner. Concerning the connectivity and the surround system, the Yamaha RX-A670 has 4 HDMI inputs, and it has the dolby ATMOS sound system, which is the latest audio format, giving a three-dimensional effect to the produced sounds and it can be connected to Iphones, Ipads and other Apple products via Airplay.

The Yamaha RX-A870 can be connected to the internet, it can connect through bluetooth, the Yamaha RX-A870 is unfortunately not MHL-compatible, yet it does not have an integrated tuner. Concerning the connectivity and the surround system, the Yamaha RX-A870 has 8 HDMI inputs and it has the dolby ATMOS.

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