Will 3.5mm to rca splitter work with 2 home subwoofers? creative x7 sound card has 3.5mm sub out and each sub has single rca in.

I think so as long as the RCA female and male fit what you're imputing. Some RCAs are 1/8"/3.5mm and and others are 1/4"/6.35mm.

can this work in reverse--converting a 2-prong airplane headset to a one prong set, so not splitting, but fusing?

Yes, this works both directions.

can this work in reverse--converting a 2-prong airplane headset to a one prong set, so not splitting, but fusing?

No, it won't. RCA mono is not compatible with 1/8" mono. For that use you'll need to get an adapter with "female" stereo 1/8" to dual "male" mono 1/8". You will then plug the two mono plugs into the airplane outlet and then plug your own headset, earbuds, or headphones into the stereo side of the adapter. In my experience, most airline audio is now compatible with standard stereo plugs so they don't have to bother with their own custom headphones. Noise cancelling headphones are so commonly used, it doesn't make sense for them to try to stick with the older custom interface. Also, most noise cancelling headphones come with the stereo to dual-mono adapter in the box. Bose certainly does (I have a couple of them).

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ANDTOBO 3.5 mm TRS to Dual RCA F (2-Pack), 3.5mm Stereo Male to Dual RCA Female Audio Breakout Adapter

Product ID: 510503216

Details

Compatible devices
Headphone
Specific uses for product
Speaker
Connector type
3.5 mm
Colour
Black
Item dimensions L x W x H
25 x 45 x 10

✨Gold-plated connectors

🎧Stereo audio signal

🔌3.5mm to Dual RCA

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Sold byAmazon VietnamDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎶 Elevate Your Sound Experience!

DURABLE RELIABLE - Grip treads ensure easy plugging and unplugging, built to last.
USER FRIENDLY DESIGN - Color-coded ends make installation a breeze—just plug and play!
SEAMLESS CONNECTIVITY - Effortlessly connect your devices with 3.5mm to Dual RCA.
SUPERIOR SOUND QUALITY - Gold-plated connectors minimize signal loss for crystal-clear audio.
VERSATILE COMPATIBILITY - Perfect for smartphones, MP3 players, and home stereo systems.

The ANDTOBO 3.5 mm TRS to Dual RCA F (2-Pack) is a high-quality audio adapter designed to connect your portable devices to home audio systems. Featuring gold-plated connectors for superior sound quality and a user-friendly design with color-coded ends, this adapter ensures seamless connectivity and durability for all your audio needs.

Specifications

ASIN	B07DPK9Q94
Best Sellers Rank	#6,941 in Electronics ( See Top 100 in Electronics ) #81 in RCA Cables
Brand	ANDTOBO
Color	Black
Compatible Devices	Speaker
Connector Type	RCA
Customer Reviews	4.5 4.5 out of 5 stars (901)
Finish	Gold
Item Dimensions	0.98 x 1.77 x 0.39 inches
Item Weight	0.01 Kilograms
Manufacturer	ANDTOBO
Model Number	4348259379
Number of Items	2
Number of Ports	2
Package Quantity	1
Specific Uses For Product	Speaker
UPC	606860995717
Unit Count	2.0 Count
Warranty Type	Limited

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