Will the 2 "out" lines work for "TV headphones" and regular speakers (with no amplification in between)?

You do need an amplifier, unless your speakers and headphones are amplified already.

Does this device allow one to connect, say, 2 different CD players to the amp and switch indifferently between the two, one signal at a time?

Yes. If you read the other questions, the connection is explained. Any 4 RCA sources to one Amp or reversed such as single CD player to 4 different amps.

What is the maximum recommended cable length for the output, since it is passive?

That’s hard to tell. Depends on your cable and your tolerance of signal degradation.

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ST42 4-Way RCA Audio Switch Source Signal Input switcher selector Splitter Box (4 in 2 Out)

ST42 4-Way RCA Audio Switch Source Signal Input switcher selector Splitter Box (4 in 2 Out)

Product ID: 393965516

Details

Brand
SOLUPEAK
Cable type
RCA
Colour
Black
Compatible devices
DVD Player PC
Connector type
RCA

🔄4 stereo inputs, seamless switching

🔊2 amplifier outputs, dual control

⚙️Aluminum chassis & knob, durable build

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₺7607

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Sold byAmazon TurkeyDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎧 Master your soundscape with effortless 4-in-2 out control!

DUAL AMPLIFIER OUTPUT - Seamlessly route audio to two amplifiers for versatile sound setups.
PREMIUM BUILD QUALITY - Solid aluminum chassis and knob deliver durability with a sleek, professional look.
GOLDEN PLATED RCA JACKS - High-quality connectors ensure lossless, crystal-clear audio transmission.
PLUG PLAY CONVENIENCE - Passive design means zero power needed—just connect and enjoy instant switching.
EFFORTLESS AUDIO CONTROL - Switch between 4 stereo sources with a simple twist—no more cable chaos.

The SOLUPEAK ST42 is a compact, passive 4-way RCA audio switcher that allows users to connect up to four stereo sources and switch between two amplifiers using durable aluminum rotary knobs. Featuring golden-plated RCA jacks for lossless audio and a robust aluminum chassis, it offers plug-and-play convenience for professional-grade audio management without the hassle of unplugging cables.

Specifications

ASIN	B094W84SR5
Audio Output Mode	Stereo
Best Sellers Rank	#118,882 in Electronics ( See Top 100 in Electronics ) #307 in Audio & Video Selector Boxes
Brand	SOLUPEAK
Cable Type	RCA
Color	Black
Compatible Devices	DVD Player, PC, Television
Connector Type Used on Cable	RCA
Customer Reviews	4.4 4.4 out of 5 stars (152)
Item Dimensions D x W x H	15.2D x 10.2W x 5.1H centimeters
Item Weight	500 Grams
Manufacturer	Zhuogang
Mfr Part Number	ST42
Model Number	ST42
Number of Ports	4
UPC	710702291452 710702291469

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