RX-A8A

RX-A8A RX-A6A RX-A4A
Amplifier Section Channel 11.2 9.2 7.2
Rated Output Power (1kHz, 1ch driven) 185 W (8 ohms, 0.9% THD) 185 W (8 ohms, 0.9% THD) 135 W (8 ohms, 0.9% THD)
Rated Output Power (20Hz-20kHz, 2ch driven) 150 W (8 ohms, 0.06% THD) 150 W (8 ohms, 0.06% THD) 110 W (8 ohms, 0.06% THD)
Maximum Effective Output Power (1kHz, 1ch driven) 220 W (8 ohms, 10% THD) 220 W (8 ohms, 10% THD) 165 W (8 ohms, 10% THD)
High Slew Rate Amplifier Yes Yes Yes
Surround Sound Processing Surround:AI Yes Yes Yes
CINEMA DSP Yes (HD3) Yes (HD3) Yes (HD3)
DSP Programs 24 24 24
Dialog Level Adjustment Yes Yes Yes
Virtual Presence Speaker Yes Yes Yes
Virtual Surround Back Speaker Yes Yes Yes
Dialogue Lift Yes Yes Yes
SILENT CINEMA / Virtual CINEMA DSP Yes Yes Yes
Dolby Atmos Yes Yes Yes
Dolby Atmos Height Virtualizer Yes Yes Yes
Dolby TrueHD Yes Yes Yes
Dolby Digital Plus Yes Yes Yes
Dolby Surround Yes Yes Yes
DTS:X Yes Yes Yes
DTS-HD Master Audio Yes Yes Yes
Auro 3D Yes Yes N/A
Audio Features File Format MP3 / WMA / MPEG-4 AAC, ALAC: up to 96 kHz / 24-bit, FLAC: up to 384 kHz / 24-bit, WAV / AIFF: up to 384 kHz / 32-bit, DSD: up to 11.2 MHz MP3 / WMA / MPEG-4 AAC, ALAC: up to 96 kHz / 24-bit, FLAC: up to 384 kHz / 24-bit, WAV / AIFF: up to 384 kHz / 32-bit, DSD: up to 11.2 MHz MP3 / WMA / MPEG-4 AAC, ALAC: up to 96 kHz / 24-bit, FLAC: up to 384 kHz / 24-bit, WAV / AIFF: up to 384 kHz / 32-bit, DSD: up to 11.2 MHz
Pure Direct Yes Yes Yes
Compressed Music Enhancer Yes Yes Yes
High-resolution Music Enhancer Yes Yes Yes
YPAO multi-point measurement Yes with R.S.C. (Reflected Sound Control) , 3D, 64-bit High Precision EQ Calculation and Angle Measurement Yes with R.S.C. (Reflected Sound Control) , 3D, 64-bit High Precision EQ Calculation and Angle Measurement Yes with R.S.C. (Reflected Sound Control) , 3D, 64-bit High Precision EQ Calculation and Angle Measurement
YPAO Volume Yes Yes Yes
Adaptive DRC (Dynamic Range Control) Yes Yes Yes
Initial Volume & Maximum Volume Setting Yes Yes Yes
A.R.T. Wedge Yes Yes Yes
Bi-amp capability Yes Yes Yes
Audio Delay Yes (0-500 ms) Yes (0-500 ms) Yes (0-500 ms)
DA Converter 384 kHz / 32-bit ESS Hyperstream DAC ES9026PRO x2 384 kHz / 32-bit ESS Hyperstream DAC ES9026PRO x1 ES9007S x1 384 kHz / 32-bit ESS Hyperstream DAC ES9007S
Video Features HDMI eARC Yes Yes Yes
HDMI Audio Return Channel Yes Yes Yes
HDMI Pass-through 8K60AB, 4K120AB, 40GBPS 8K60AB, 4K120AB, 40GBPS 8K60AB, 4K120AB, 40GBPS
HDMI Up-scaling Yes, up to 8K Yes, up to 8K Yes, up to 8K
HDMI Up-conversion Yes (Analog to HDMI) Yes (Analog to HDMI) N/A
Dolby Vision Yes Yes Yes
HDR 10+ Yes Yes Yes
VRR/ALLM Yes/Yes Yes/Yes Yes/Yes
Video adjustment Yes Yes N/A
Connectivity MusicCast Surround Yes Yes Yes
HDMI Input/Output 7 / 3 (HDCP2.3) 7 / 3 (HDCP2.3) 7 / 3 (HDCP2.3)
HDMI CEC Yes Yes Yes
USB Input Yes Yes Yes
Network Port Yes Yes Yes
Wi-Fi Yes (2.4 / 5 GHz) Yes (2.4 / 5 GHz) Yes (2.4 / 5 GHz)
AirPlay 2 Yes Yes Yes
Bluetooth Yes (SBC / AAC) Yes (SBC / AAC) Yes (SBC / AAC)
Front AV Input USB USB USB
Digital Audio Input/Output: Optical 3 / 0 3 / 0 2 / 0
Digital Audio Input/Output: Coaxial 2 / 0 2 / 0 1 / 0
Analog Audio Input/Output 6 / 0 6 / 0 4 / 0
Phono Input Yes Yes Yes
XLR Terminal Yes Yes N/A
Component Video Input/Output 1 / 0 1 / 0 N/A
Composite Video Input/Output 2 / 0 2 / 0 N/A
Preout 11.2-ch 11.2-ch 7.2-ch
Headphone Output 1 1 1
Tuner Section FM/AM Tuner Yes (Availability varies by region.) Yes (Availability varies by region.) Yes (Availability varies by region.)
DAB Tuner Yes (Availability varies by region.) Yes (Availability varies by region.) Yes (Availability varies by region.)
User Interface On-screen display Graphical User Interface Graphical User Interface Graphical User Interface
SCENE SCENE PLUS (8 sets) SCENE PLUS (8 sets) SCENE PLUS (8 sets)
App Control Yes (iPhone / iPad / Android phone / tablet) Yes (iPhone / iPad / Android phone / tablet) Yes (iPhone / iPad / Android phone / tablet)
Web Browser Control Yes Yes Yes
Remote Control Unit Yes Yes Yes
Zone Control Zone 2 Audio Output Preout / HDMI Preout / HDMI Preout / HDMI
Zone 3 Audio Output Preout Preout N/A
Zone 4 Audio Output HDMI HDMI N/A
Powered Zone Zone 2 / 3 Zone 2 / 3 Zone 2
Zone Video Output HDMI (Up to 4K/60Hz) HDMI (Up to 4K/60Hz) HDMI (Up to 4K/60Hz)
Zone B Output HDMI HDMI N/A
Zone GUI Yes Yes N/A
RS-232C Interface N/A N/A N/A
+12V Trigger Output 2 2 2
Remote (IR) Input/Output 1 / 1 1 / 1 1 / 1
Party Mode Yes Yes Yes
General Standby Power Consumption (IR only) <0.4 W <0.4 W <0.4 W
Auto Power Standby Yes Yes Yes
ECO mode Yes Yes Yes
Dimensions (W x H x D) 435 W x 192 H x 477 D mm (with antenna up:435 W x 271 H x 477 D mm);17-1/8"W x 7-1/2"H x 18-3/4"D (with antenna up:17-1/8"W x 10-5/8"H x 18-3/4"D) 435 W x 192 H x 442 D mm (with antenna up:435W x 271H x 442D mm); 17-1/8"W x 7-1/2"H x 17-3/8"D (with antenna up:17-1/8"W x 10-5/8"H x 17-3/8"D) 435 W x 191 H x 442 D mm (with antenna up:435 W x 270 H x 442 D mm);17-1/8"W x 7-1/2"H x 17-3/8"D (with antenna up:17-1/8"W x 10-5/8"H x 17-3/8"D)
Weight 21.4 kg; 47.2 lbs. 20.3 kg; 44.8 lbs. (Varies by region) 16.2 kg; 35.7 lbs.

*YAMAHA initially intended to support QMS (Quick Media Switching) within the HDMI 2.1 specification. However, YAMAHA later discovered that these models cannot be updated to support QMS via firmware. This is due to an unforeseen hardware limitation caused by QMS specification change in HDMI 2.1a. This hardware limitation affects current AV receivers, including Yamaha. (Information corrected in May 2023)