Question on Home Theater AV Receivers

Yamaha V671:

RX-V671
AV Receiver
Amplifier Section Channel 7.1
Rated Output Power (1kHz, 1ch driven) 150W (4ohms, 0.9% THD); 125W (8ohms, 0.9% THD)
Rated Output Power (20Hz-20kHz, 2ch driven) 90W (8ohms, 0.09% THD)
Dynamic Power / Ch (Front L/R, 8/6/4/2 ohms) 130/170/200/240W
Surround Sound Processing Cinema DSP Yes (3D)
DSP Programs 17
Virtual Presence Speaker Yes
Dialogue Lift Yes
SILENT Cinema / Virtual Cinema DSP Yes
Dolby TrueHD Yes
Dolby Digital Plus Yes
Dolby Pro Logic IIx Yes
DTS-HD Master Audio Yes
Audio Features Pure Direct Yes (with video on mode)
Compressed Music Enhancer Yes
YPAO Sound Optimization Yes
Adaptive DRC (Dynamic Range Control) Yes
Initial Volume and Maximum Volume Setting Yes
Bi-amp Capability Yes
Audio Delay Yes (0-250 ms)
192kHz / 24-bit DACs for all channels Yes (Burr-Brown)
Video Features HDMI 3D Pass-through Yes
HDMI Audio Return Channel Yes
Component upconversion Yes
HDMI Upscaling Yes (Analog to HDMI / HDMI to HDMI)
Deep Color / x.v.Color / 24Hz Refresh Rate / Auto Lip-Sync Yes
Extensive Connection HDMI Input/Output 6 (front 1) / 1
HDMI CEC Yes (SCENE, Device Control)
USB Input iPod/iPhone, USB Memory, Portable Audio Player
Network Port Napster / vTuner Internet Radio
Front AV Input HDMI/USB/Analog Audio/Composite
Digital Audio Input / Output: Optical 2 / 0
Digital Audio Input / Output: Coaxial 2 / 0
Analog Audio Input / Output 6 (front 1) / 1
Composite Video Input / Output 5 (front 1) / 1
Preout SW
Headphone Output 1
Connectivity Dock Port 1 (YDS-12, YID-W10, YBA-10)
Phono Input Yes
Component Video Input/Output 2 / 1
S-Video Input/Output 1 / 0
Tuner Section FM / AM Tuner Yes
User Interface On-Screen Display Graphical User Interface
SCENE SCENE (4 sets)
App Control Yes
Web Browser Control Yes
Remote Control Unit Yes (Preset)
Zone Control Zone 2 Audio Output Line output
Powered Zone Zone 2
+12V Trigger Output 1
Remote (IR) Input/Output 1 / 1
General Standby Power Consumption (IR only) =0.1W
Auto Power Standby Yes
Dimensions (W x H x D) 435 x 161 x 363 mm
Weight 10.5 kg

Denon AVR-3700

Features & specs
Amplification
Number Of Channels 9
Stereo RMS Power (watts) 105
THD in Stereo 0.08 %
Frequency Bandwidth (stereo) 20-20k Hz
Minimum Impedance L/R 4 ohms
Minimum Impedance Center 4 ohms
Minimum Impedance Surround 4 ohms
General Features
Bluetooth Built-in
Apple AirPlay AirPlay 2
Alexa-compatible Yes
Google Assistant-compatible Yes
Chromecast built-in No
DTS Play-Fi No
App Remote Control Yes
On-Screen Display Thru HDMI
Auto Speaker Calibration Audyssey MultEQ XT32
Multi-room Audio/Video
Powered Multi-room Audio Output Yes
Preamp Multi-room Audio Output Yes
Multi-room HDMI Output Yes
Total Number of Zones 2
Playback from Digital Audio Inputs Yes
Playback from Streaming Sources Yes
Surround Processing
Dolby Digital DD, TrueHD, DD+, EX
Dolby Atmos Yes
Dolby Atmos Height Virtualization Yes
DTS DTS, HD, HDMA, ES, 96/24
DTS:X Yes
DTS Virtual:X Yes
Inputs & Outputs
Phono Input 1
Audio-Video Inputs 7
Audio-only Inputs 2
Component Video Inputs 2
Component Video Monitor Outputs 1 (480i only)
Optical Digital Inputs 2
Coaxial Digital Inputs 2
Optical Digital Outputs None
Coaxial Digital Outputs None
Number of HDMI Inputs 7
HDMI Monitor Outputs 3
Subwoofer Outputs 2
Discrete Subwoofer Outputs Yes
Multi-Channel Analog Input No
Multi-channel Preamp Output Yes
Main Speaker Output Pairs Posts
Main Speaker Terminals Posts
Ethernet Port Yes
USB Connections Y
Removable Power Cord IEC 2-prong
Supports Wireless Rear Speakers No
HDMI Features
HDMI Version 2.1
VRR (Variable Refresh Rate) Yes
ALLM (Auto Low Latency Mode) Yes
4K/120Hz-Capable Inputs 1
Audio Return Channel eARC supported
Video Upscaling To 4K and 8K
HDR (High Dynamic Range) Support
HDR10 Yes
HDR10+ Yes
HLG Yes
Dolby Vision Yes
Other Specs
FM Sensitivity 12.8 dBf
Multibrand Remote Control No
Learning Remote No
Width (inches) 17.1875
Height (inches) 6.5625
Depth (inches) 15.9375
Weight (pounds) 27.6
Parts Warranty 3 Years
Labor Warranty 3 Years

Im not quite sure i know what that means? Could you explain it to me? From what you are saying, it sounds like the X3700H would give a noticeable difference?

Lol. Yeah I hear you on that one. I was just looking to try and improve the audio quality of what I have compared to the Yamaha V671. Preferably around $1500 max

Any Recommendations?

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This is most probably a dumb question, but what about the X3700H makes it so much better than the others? Would it be a noticeable jump from the Yamaha I already have?

Thanks again for all of the input!

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Primarily the room correction software and dual sub calibration.

Again, if you dont know what those are it may not be worth it for you but the X3700H is a great AVR.

There are other things for the fanatics like more speaker channels, more pre-amp outputs (for those that use external amps), etc. The DAC is also top notch based on what is currently in the market.

How would a Marantz SR6015 compare to the Denon? I know it's $500 more, but is it worth the extra money?

My bad. It would be a 7.1 setup with 99% being either tv, movie, or video games. Hope that helps and let me know if you need any additional details.

I am a Denon fan and have been running them for years. Currently have a x6500h running an 11.1 setup. I’d go 3700 if it were me and read up on the room correction software there are plenty of vids/articles out there.

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How would a Marantz SR6015 compare to the Denon? I know it's $500 more, but is it worth the extra money?

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As far as sound quality, no. If it offers additional features you want/need, then yes.