last updated 20 Mar 2022
Several recommended Home Theater AV Receivers at various sources
HelpToChoose.com/compare-av-receivers/avr-s650h-vs-strdh590
Denon AVR-S650H Sony STR-DH590 Yamaha’s RX-V683BL Onkyo TX-NR6100 Denon AVR-X4700H
Price 555
$239 refirbished
$348 $650 $800 $2,100
Amplifier
Total output power 525 W 520 W
Output power per channel 75W 90 W * 100 W 100 W 125 W
Output impedance per channel 8 Ohm 6 Ohm
Frequency response 20 Hz - 20 kHz 20 Hz-20 kHz 20 Hz-20 kHz
Total harmonic distortion 0.7% 0.9% 0.6% 0.5%
Number of channels ="5/2" ="5/2" ="7/2" ="7/2" ="11//2"
Signal-to-noise ratio 98 dB 100 dB
Functions
Digital player y y
Internet radio y n
Network audio player y n
Audio Format
AAC y y
DSD
AIFF n y
Apple lossless y y
FLAC y y
MP3 y y
WAV y y
WMA y y
Built-in decoders
DTS:X n n y y
DTS-HD master audio
DTS neural:X
Dolby Atmos n n y y y
Dolby digital plus y y
Dolby surround y y
Dolby true HD y y
Built-in decoders
DTS:X n n y
DTS-HD master audio
DTS neural:X
Dolby Atmos n n
Dolby digital plus y y
Dolby surround y y
Dolby true HD y y
Connectivity interfaces
Bluetooth y y y y
Wi-Fi y n y y
IEEE 802.3 n n
IEEE 802.3u n n
Airplay y y
Chromecast
Alexa 1 y y
Google Assistant
Signal Processing
HDMI pass-through up to 4K up to 4K 8K upgradable 8K
Video conversion/scaling HDMI to HDMI scaling, analog to HDMI up conversion n
3D pass-through n n
Upscaling via HDMI n y
Connector Type
AV inputs 2 has not
Optical digital inputs 2 1
Coaxial digital inputs 1 1
HDMI inputs 5 4
HDMI outputs 1 1
Optical digital outputs has not has not
Coaxial digital outputs has not has not
Subwoofer outputs 2 2
USB 1 1
Phones 1 1
Media content source
Bluetooth Y Y
Network Y N
USB-host y y
Radio
Tuner type digital digital
Tuner bands AM/FM AM/FM
Preset station 56 30
Additional features
A-B speaker switch n y
MCACC Pro
Deep color
X.v.Color
AIR Studios monitor certification
Three-zone capability n n
Advanced sound retriever (ASR) technology n y
Apple air-play support y n
Audio return channel (ARC) y y
Bi-amplifying n y
Auto power off y y
Pure direct mode y
Dual-zone capability y n
Control Smart phone voice
y n
Sound features
Audio D/A converter 24bit / 192kHz 32bit / 192kHz
DSP preset qty
Sound output mode
Surround sound effects Dolby Digital S-Force PRO Front Surround
Surround system class 5.2 channel 5.2 channel
Digital content protection HDCP 2.3 HDCP 2.2
Digital sound processor (DSP)
Power device
Operational power consumption 340 W 380 W
Standby power consumption 0.1 W 0.3 W
Dimensions
Dimensions 13.3 x 17.1 x 6 inches 19.1 x 13.6 x 6.9 inches 17 1/8" x 6 3/4" x 15" 21 x 18.64 x 10.64 17 1/8" x 6" x 13 3/8"
Weight 20.8 pounds 18.25 pounds
1. May need alexa with MusicCast

* Sony STR-DH590 The website and box pronounce a power rating of 145 watts, but that’s at six ohms, 1 kHz, 0.9 percent THD, one channel driven. Visit the specifications page in the owner’s manual, and you’ll find a more real-world listing of 90 watts RMS with six-ohm loads.

Other recommended receivers
Model Price Watts per
channel
Channels ATMOS
Denon AVR-S760H $600 75 7.2 y
Yamaha RC-6A $750 100 7.2 y
Denon AVR-X1700H $700 80 7.2 y
Yamaha Aventage RX-A2A $900 100 5.1 y
Onkyo TS-NR5100 $600 165 7.2 y
Marantz SR8015 $3,800 140 11.2 y


Watts Required:
Denon AVR-S750H How many watts per channel do you need | HomeTheaterHeroes
Most budget receivers start at 70-75 watts per channel, which is enough for many entertainment centers and speaker setups.
You may need more to take advantage of a home theater setup.

Web discussion's for power required for my Advent 2W,
an old bookshelf speaker (19" x 11" x7.5") which is still in demand as one of the best bookshelf speakers ever.

What Levels Should You Set Your Speakers To? – stampsound.com As a general rule speakers should be set between 70-80 dB in volume.

just-how-much-power-can-my-advent-speakers-take. | audiokarma.org/forums At eight feet or so, in a normal room, with around 40 watts of continuous power, average output would be close to 100dB. Not concert levels, but pretty darned loud. And not far from their limits.
Moving from 60W to 80W for example would be a waste of time since it would only give you an extra 1.2dB.

A decent recording will have peaks 9-12dB above average levels. At an average power level of 15 watts, you would need 240 watts to accommodate 9dB peaks without clipping, and 480 watts for 12dB peaks. An amp rated at X watts RMS can deliver 2X watts at peak (theoretically). So, you would need an amp rated at 120 watts RMS for 9dB peaks, or 240 wattts RMS for 12dB peaks.
It's not clear. They may be talking about total watts not watts per channel here.


Reviews:
wpc - Watts per channel