| RX-A1080 | RX-A880 | RX-A870 | RX-A780 | RX-A770 | RX-A680 | RX-A670 | |
|---|---|---|---|---|---|---|---|
| Rated Output Power (2-ch driven, 20Hz-20kHz, 8Ω) | 105W | 100W | 95W | 80W* | |||
| 0.06% THD | *0.09% THD | ||||||
| Poweramps | 7-ch | ||||||
| Speaker terminals | 9 ter | 7 ter | |||||
| Pre Out | 7.2-ch | 2.2-ch | 0.2-ch | ||||
| Zone Out | 2-ch | N/A | |||||
| H-shaped Frame | Yes | No | |||||
| DAC | ESS Sabre 384kHz / 32-bit | Burr-Brown 384kHz / 32-bit | Burr-Brown 192kHz / 24-bit | Burr-Brown 384kHz / 32-bit | Burr-Brown 192kHz / 24-bit | Burr-Brown 384kHz / 32-bit | Burr-Brown 192kHz / 24-bit |
| DSD up to | 11.2MHz | 5.6MHz | 11.2MHz | 5.6MHz | 11.2MHz | 5.6MHz | |
| HDMI IN/OUT rear | 7 / 3 | 7 / 2 | 5 / 2 | 5 / 1 | 4 / 1 | ||
| HDMI IN front | No | Yes | No | Yes | No | ||
| HDCP ver. | 2.3 | 2.2 (HDMI IN 1-3) | 2.3 | 2.2 (HDMI IN 1-3) | 2.3 | 2.2 | |
| Digital Audio IN optical/coaxial | 3 / 3 | 2 / 2 | 1 / 2 | ||||
| Phono Input | Yes | No | |||||
| 12V Trigger Output | 2 | 1 | N/A | ||||
| Remote In/Out | 1 / 1 | N/A | |||||
| RS-232C | 1 | N/A | |||||
| YPAO | RSC, Multi measure, Precision EQ, YPAO Volume | RSC, Multi measure, YPAO Volume | RSC, Single measure, YPAO Volume | Single measure | |||
| DSP Programs | 24; Cinema DSP HD3; Surround:AI | 17; Cinema DSP 3D | |||||
| Firmware Updates | eARC; AirPlay 2; Amazon Music and enhanced Alexa Voice Control | eARC | eARC; AirPlay 2; Amazon Music and enhanced Alexa Voice Control | eARC | eARC; AirPlay 2; Amazon Music and enhanced Alexa Voice Control | eARC | |
Check availability and pricing on Amazon.com for the Yamaha RX-A1080, RX-A880, RX-A870, RX-A780, RX-A770, RX-A680 or RX-A670 (affiliate links; As an Amazon Associate I earn from qualifying purchases.)
Only the RX-A1080 is reinforced with cross members which leads to its frame being an H-shaped. This is done for the purpose of increasing rigidity and stability of the frame so that chassis vibrations (and their impact on the sound quality) are minimized. Even though the remaining Yamaha receivers don't have an H-shaped frame, there are still features aimed at dampening vibrations from either internal components such as the power transformer and power transistors, or external: speakers, for example. Specifically, the Anti-Resonance Technology Wedge (that can be found on all Yamaha receivers in this comparison) is a fifth foot placed in the center of the receiver. The interior of the remaining feet, and the curved peripheral ribs in particular, are also purposefully designed to aid the dispersing of any chassis resonance. The RX-A1080, RX-A880, RX-A870, RX-A780, RX-A770, RX-A680, and RX-A670 all have an aluminium front panel which shields their circuitry from external interference.
Even though the DACs (Digital to Analogue Converters) used by the RX-A1080, RX-A880, RX-A780, and RX-A680 are 384kHz/32-bit, they're not all from the same manufacturer. For example, the RX-A1080 has a single ESS SABRE Premier ES9007S DAC, whereas the RX-A880, RX-A780, and RX-A680 utilize Burr-Brown DACs for the main zone. The same applies to their predecessors: i.e. the RX-A870, RX-A770, and RX-A670, albeit their DACs are 192kHz/24bit. It's possible to playback DSD files up to 11.2 MHz on the RX-A1080, RX-A880, RX-A780, and RX-A680 whereas the RX-A870, RX-A770, and RX-A670 are limited up to 5.6 MHz.
A front HDMI input can only be found on the RX-A870 and RX-A770. The rest of the Yamaha receivers have all of their HDMI terminals on the back. This is where the RX-A1080, RX-A880, and RX-A870's 7 HDMI inputs are located. In case of the RX-A780 and RX-A770, there are 5 HDMI inputs, and the RX-A680 and RX-A670 have 4. In terms of HDMI outputs, the RX-A1080 has 3; the RX-A880, RX-A870, and RX-A780 have 2; and the RX-A770, RX-A680, and RX-A670 have only a single HDMI output. All of the HDMI inputs and outputs on the RX-A1080, RX-A880, RX-A780, and RX-A680 are HDCP 2.3 compatible. The RX-A870, RX-A770, and RX-A670, on the other hand, are compatible with the HDCP 2.2 standard but only on the first three HDMI inputs (RX-A870 and RX-A770). The RX-A670's four HDMI inputs are all HDCP 2.2 compatible, though. The same applies to the single HDMI output on the RX-A770 and RX-A670, in addition to the two HDMI outputs on the RX-A870. There is a firmware update available for all Yamaha receivers in this comparison that enables eARC (enhanced Audio Return Channel) on one of the HDMI outputs.
The RX-A680 has a phono input (unlike its predecessor: the RX-A670), and so do the rest of the Yamaha receivers in this comparison. The RX-A670 and RX-A680 omit the 12V trigger output and the Remote in/out that are present on the remaining Yamaha receivers (the RX-A1080 even has two 12V trigger outputs). The RS-232C terminal can only be found on the RX-A870, RX-A880, and RX-A1080, though. The RX-A880, RX-A870, RX-A780, and RX-A770 have 1 composite and 1 component video input. In comparison, the RX-A1080 have 4 composite and 2 component video inputs. The RX-A680 and RX-A670 are the only ones without a component video input but also the only ones with a composite video output. Furthermore, the RX-A680 and RX-A670 have 3 composite video inputs. In terms of digital audio inputs, the RX-A880, RX-A870, RX-A780, and RX-A770 have 2 optical and 2 coaxial, the RX-A1080 has 3 optical and 3 coaxial whereas the RX-A680 and RX-A670 have 1 optical and 2 coaxial.
All Yamaha receivers in this comparison have the ability to automatically detect speaker connections, the distances to your listening position, and optimize speakers for the acoustics of your room. That being said, there are some significant differences such as the number of measurement points supported, and the ability (or lack thereof) for sound reflections to be corrected. For example, the RX-A670, RX-A680, RX-A770, and RX-A780 are able to perform measurements only at a single location (i.e. your listening position) whereas the RX-A870, RX-A880, and RX-A1080 have multi-point measurement capabilities (at up to 8 different positions). Reflected Sound Control (R.S.C) technology is employed on all Yamaha receivers but the RX-A680 and RX-A670 which also omit the YPAO Volume feature for adjusting high and low frequencies as volume level change which is done because humans ears tend to be less sensitive to these frequencies when volume is low.
The RX-A670 and RX-A680 lack the Pure Direct mode found on all other Yamaha receivers in this comparison. Apart from the RX-A1080, which has 24 DSP programs that utilize the Cinema DSP HD3 technology, the rest of the Yamaha receivers have 17 DSP programs, and the Cinema DSP 3D technology. According to Yamaha, the Cinema DSP HD3 exhibits more than two-fold increase in the acoustic reflection generating capabilities in comparison to the Cinema DSP 3D. The RX-A1080 is the only one utilizing Surround:AI with the DSP so that audio can be optimized for different scenes in a movie (by comparing distinct audio elements that have been detected to a reference database). As a result, the intelligibility of dialogues can be improved in case the scene has prevalent background noise, for example.
There are firmware updates that only the newer Yamaha receivers (i.e. RX-A1080, RX-A880, RX-A780, and RX-A680) will receive, such as for Apple AirPlay 2, or Amazon Music and enhanced Alexa Voice Control functionalities but you'll still need an Alexa device (sold separately) if you wish to use the enhanced voice control with these receivers. The RX-A870, RX-A770, and RX-A670 can also be receive voice commands via Alexa, albeit only for some basic functions (and not for controlling streaming services, for example).
The RX-A1080, RX-A880, RX-A780, and RX-A680 are compatible with wireless surround speakers (MusicCast 50 or MusicCast 20, sold separately) thanks to the MusicCast Surround technology. Furthermore, you can add a wireless subwoofer (MusicCast SUB 100, sold separately) to these Yamaha receivers, but no to the RX-A870, RX-A770, or RX-A670.
Check availability and pricing on Amazon.com for the Yamaha RX-A1080, RX-A880, RX-A870, RX-A780, RX-A770, RX-A680 or RX-A670 (affiliate links; As an Amazon Associate I earn from qualifying purchases.)
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