RX-V6A RX-V4A
Amplifier Section Channel 7.2 5.2
Rated Output Power (1kHz, 1ch driven) 125 W (8 ohms, 0.9% THD) 115 W (6 ohms, 0.9% THD)
Rated Output Power (20Hz-20kHz, 2ch driven) 100 W (8 ohms, 0.06% THD) 80 W (6 ohms, 0.06% THD)
Maximum Effective Output Power (1kHz, 1ch driven) 150 W (8 ohms, 10% THD) 145 W (6 ohms, 10% THD)
High Slew Rate Amplifier Yes Yes
Surround Sound Processing Surround:AI N/A N/A
CINEMA DSP Yes Yes
DSP Programs 17 17
Dialog Level Adjustment Yes Yes
Virtual Presence Speaker Yes Yes
Virtual Surround Back Speaker Yes N/A
Dialogue Lift Yes N/A
SILENT CINEMA / Virtual CINEMA DSP Yes Yes
Dolby Atmos Yes N/A
Dolby Atmos Height Virtualizer Yes N/A
Dolby TrueHD Yes Yes
Dolby Digital Plus Yes Yes
Dolby Surround Yes N/A
DTS:X Yes N/A
DTS-HD Master Audio Yes Yes
Audio Features File Format MP3 / WMA / MPEG-4 AAC: up to 48 kHz / 16-bit, 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: up to 48 kHz / 16-bit, ALAC: up to 96 kHz / 24-bit, FLAC: up to 192 kHz / 24-bit, WAV / AIFF: up to 192 kHz / 32-bit, DSD: up to 11.2 MHz
Pure Direct Yes Yes
Compressed Music Enhancer Yes Yes
High-resolution Music Enhancer N/A N/A
YPAO multi-point measurement Yes N/A
YPAO Volume Yes N/A
Adaptive DRC (Dynamic Range Control) Yes Yes
Initial Volume & Maximum Volume Setting Yes Yes
A.R.T. Wedge N/A N/A
Bi-amp capability Yes Yes
Audio Delay Yes (0-500 ms) Yes (0-500 ms)
DA Converter 384 kHz / 32-bit BB PCM5102A 384 kHz / 32-bit BB PCM5101A
Video Features HDMI eARC Yes Yes
HDMI Audio Return Channel Yes Yes
HDMI Pass-through 8K60B, 4K120AB, 24GBPS *HDMI1-3 8K60B, 4K120AB, 24GBPS
HDMI Up-scaling Yes up to 4K Yes up to 4K
HDMI Up-conversion N/A N/A
Dolby Vision Yes Yes
HDR 10+ Yes Yes
VRR/ALLM Yes/Yes Yes/Yes
Video adjustment N/A N/A
Connectivity MusicCast Surround Yes Yes
HDMI Input/Output 7 / 1 4 / 1
HDMI CEC Yes Yes
USB Input Yes Yes
Network Port Yes Yes
Wi-Fi Yes (2.4 / 5 GHz) Yes (2.4 / 5 GHz)
AirPlay 2 Yes Yes
Bluetooth Yes (SBC / AAC) Yes (SBC / AAC)
Front AV Input USB USB
Digital Audio Input/Output: Optical 1 / 0 1 / 0
Digital Audio Input/Output: Coaxial 1 / 0 1 / 0
Analog Audio Input/Output 4 / 0 3 / 0
Phono Input Yes N/A
XLR Terminal N/A N/A
Component Video Input/Output N/A N/A
Composite Video Input/Output N/A N/A
Preout 2.2-ch 0.2-ch
Headphone Output 1 1
Tuner Section FM/AM Tuner Yes (Availability varies by region.) Yes (Availability varies by region.)
DAB Tuner Yes (Availability varies by region.) Yes (Availability varies by region.)
User Interface On-screen display Graphical User Interface Graphical User Interface
SCENE Yes (8 sets) Yes (4 sets)
App Control Yes (iPhone / iPad / Android phone / tablet) Yes (iPhone / iPad / Android phone / tablet)
Web Browser Control Yes N/A
Remote Control Unit Yes Yes
Zone Control Zone 2 Audio Output Preout N/A
Zone 3 Audio Output N/A N/A
Zone 4 Audio Output N/A N/A
Powered Zone Zone 2 N/A
Zone Video Output N/A N/A
Zone B Output N/A N/A
Zone GUI N/A N/A
RS-232C Interface N/A N/A
+12V Trigger Output 1 N/A
Remote (IR) Input/Output N/A N/A
Party Mode Yes N/A
General Standby Power Consumption (IR only) 0.1 W 0.1 W
Auto Power Standby Yes Yes
ECO mode Yes Yes
Dimensions (W x H x D) 435 W x 171 H x 377 D mm (with antenna up:435W x 245H x 377D mm);17-1/8"W x 6-3/4"H x 14-7/8"D (with antenna up:17-1/8"W x 9-5/8"H x 14-7/8"D) 435 W x 171H x 377D mm (with antenna up:435 W x 245 H x 377 D mm);17-1/8"W x 6-3/4"H x 14-7/8"D (with antenna up:17-1/8"W x 9-5/8"H x 14-7/8"D)
Weight 9.8 kg; 21.6 lbs. 8.8 kg; 19.4 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)