Can you easily switch these from surround mode to stand alone mode?

On your cellphone you set up the speakers using the musiccast app. Once they are linked to your internet modem/AP you can quickly switch from linked mode [stereo] to individual all within thr phone app.

Will the musiccast 20 speakers work with the rx-v683 receiver?

heres the link to answer your question , https://usa.yamaha.com/products/contents/audio_visual/musiccast/musiccast-compatiblity.html ... the rx-v 683 will work but not as surround speaker

Is this just one speaker or two? Looking for wireless rear speakers for surround sound setup.

This is for one speaker. If you’re looking for a wireless surround setup, make sure your receiver supports it. The current 2018 Yamaha receivers are the only ones that support MusicCast Surround. I bought my receiver late last year (the RX-A1060) and it only supports wireless sync, not wireless surround.

Would these work as wireless rear speakers with a Yamaha AV receiver for a surround system?

You mean rear, as in 7.1? No. You can use them as surround speakers in a 5.1 system, which is how I am using them.

Audio Musiccast 20 Wireless Speaker Black

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Sold byAmazon MalaysiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎶 Elevate your space with wireless sound that moves with you!

SPACE SAVVY DESIGN - Compact, stylish, and wall-mountable to fit any room aesthetic without clutter.
VERSATILE CONNECTIVITY - Supports Wi-Fi, Bluetooth 4.2, AirPlay, and Spotify Connect for ultimate streaming flexibility.
HANDS FREE VOICE CONTROL - Compatible with Alexa via Echo devices for convenient voice-activated music management.
IMMERSIVE SURROUND SOUND - Pair two MusicCast 20 speakers or integrate with a 5.1 channel AV receiver for wireless surround sound.
SEAMLESS MULTI ROOM AUDIO - Control and stream music effortlessly across multiple rooms with the intuitive MusicCast app.

The Yamaha MusicCast 20 Wireless Speaker delivers rich stereo sound with versatile streaming options including Wi-Fi, Bluetooth 4.2, AirPlay, and Spotify Connect. Its compact, wall-mountable design fits any room style, while the MusicCast app enables seamless multi-room control. Perfect for creating wireless surround sound setups or enjoying hands-free Alexa voice control, this speaker combines premium audio performance with modern smart home convenience.

Specifications

ASIN	B07CK93ZZF
Additional Features	Stereo pairing;Radio
Age Range Description	Adult
Antenna Location	Music,Home Theater
Audio Driver Size	20.07 centimeters
Audio Driver Type	Dynamic Driver
Audio Output Mode	Stereo
Battery Average Life	10 hours
Best Sellers Rank	#31,121 in Electronics ( See Top 100 in Electronics ) #31 in Surround Sound Systems #1,886 in Earbud & In-Ear Headphones
Bluetooth Range	32 feet
Brand	Yamaha
Built-In Media	Speaker, manual
Color	Black
Compatible Devices	Home Theater
Connectivity Protocol	Bluetooth, Wi-Fi
Connectivity Technology	Bluetooth
Control Method	App
Controller Type	Amazon Alexa
Customer Package Type	Standard Packaging
Customer Reviews	4.1 4.1 out of 5 stars (365)
Enclosure Material	Metal, Plastic
Frequency Response	40 hertz
Global Trade Identification Number	00027108957302
Is Waterproof	FALSE
Item Dimensions D x W x H	5.2"D x 5.9"W x 7.9"H
Item Type Name	• Yamaha MusicCast 20 Wireless speaker for Streaming Music. Black. Works with Alexa.
Item Weight	4.8 pounds
Manufacturer	Yamaha
Maximum Range	32 feet
Model Name	WX-021BL
Model Number	WX-021BL
Mounting Type	Wall Mount
Number of Audio Channels	5.1
Number of Items	1
Number of Power Levels	1
Power Source	AC
Series Number	21
Speaker Maximum Output Power	4 watts
Speaker Size	20.07 centimeters
Speaker Type	Multi Room
Specific Uses For Product	Music, Home Theater, Wireless Surround
Subwoofer Connectivity Technology	Wireless
Tweeter Diameter	1 inches
UPC	027108957302
Unit Count	1 Count
Warranty Description	2 Year Manufacturer
Warranty Type	Manufacturer Warranty
Water Resistance Level	Not Water Resistant
Wireless Technology	Bluetooth, Wi-Fi
Woofer Diameter	8.89 centimeters

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