Is it possible to have 3 receivers in the same room? I assume I would need to change each to be on a different frequency/channel, is that possible?

You can have 2-3 transmitters in the same location, as far as keeping them 3 feet apart from each other. No need to re-program them.

I ordered the set of 4 earphones with the transmitter for a silent disco experience and now need to order 4 additional earphones which do I order?

Here is the additional headphones for Quartet - https://www.amazon.com/dp/B09DKS353X

How adjustable are the headphones? I'm looking for something that my young children can use and grow into.

Adjustable to fit kids to adults

Is it possible for my wife to listen from TV speaker while I listen through headphones?

Yes that should not be a problem. I am able to use the headphones as well as my sound bar and TV speakers.

Avantree Quartet Four Wireless Tv Headphones With Transmitter

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Description

🎬 Elevate your group viewing — hear every detail, together.

DUAL AUDIO OUTPUT - Simultaneously stream to headphones and external soundbars for immersive sound setups.
GROUP AUDIO SHARING - Connect 4 headphones instantly to one transmitter for shared, personalized volume listening.
MASSIVE SCALABILITY - Expand up to 100 headphones for epic group experiences — from silent discos to classrooms.
ZERO LIP SYNC DELAY - Experience perfectly synced audio-visuals with latency as low as 30 milliseconds.
UNIVERSAL COMPATIBILITY - Seamlessly plugs into TVs, projectors, mixers via optical, AUX, or RCA inputs.

Avantree Quartet is a premium wireless audio system featuring four over-ear headphones and a versatile transmitter. Designed for group listening, it supports up to 100 headphones via 2.4G RF wireless technology with ultra-low 30ms latency, ensuring flawless audio sync. Compatible with optical, AUX, and RCA inputs, it fits any environment from home theaters to classrooms. With 20-hour battery life and simultaneous soundbar pass-through, it delivers flexible, high-quality sound for shared entertainment.

Specifications

ASIN	B09BHQDHFS
Additional Features	Volume Control, wireless 2.4 RF
Age Range Description	Adult
Antenna Location	Family Movie, TV Watching
Audio Driver Type	Dynamic Driver
Audio Latency	30 milliseconds
Battery Average Life	20 hour
Battery Charge Time	3 hours
Best Sellers Rank	#24,452 in Electronics ( See Top 100 in Electronics ) #782 in Over-Ear Headphones
Brand Name	Avantree
Built-In Media	Cable - Optical, RCA, 3.5mm AUX / USB Charging Cable, Headphones x4, Transmitter x1
Cable Features	Optical, RCA, 3.5mm AUX, USB
Color	Black
Compatible Devices	Television, Laptops, Desktops
Connectivity Technology	2.4G RF Wireless
Control Method	Touch
Control Type	Volume Control
Customer Reviews	4.4 4.4 out of 5 stars (263)
Earpiece Shape	Over Ear
Enclosure Material	Leather
Frequency Range	20Hz - 20KHz
Frequency Response	20000 hertz
Headphone Folding Features	Over Ear
Headphone Jack	3.5 mm Jack
Headphones Ear Placement	Over Ear
Impedance	32 ohm
Item Type Name	Multiple RF Wireless Headphones (4 Pack) for TV Watching
Item Weight	220 g
Manufacturer	Avantree
Model Name	Quartet
Model Number	WSHT-5049
Noise Control	Sound Isolation
Number of Items	5
Specific Uses For Product	TV Watching
Style Name	Quartet
Theme	Movie
Unit Count	4 Count
Warranty Description	Warranty - 24 months (product registration to cover first 12m return shipment cost) \| Extensive Support: Chat, Email, Phone, Online Clinic, Video Tutorials, FAQ and Registration - avantree.com/support
Water Resistance Level	Not Water Resistant
Wireless Technology	2.4G RF Wireless

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Avantree Quartet - Four Wireless TV Headphones with Transmitter

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