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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S1 4 Way RCA Audio Switch Stereo Switcher Selector Box | 4 IN 1 OUT you quickly sw between 4 audio sources in, avoiding frequent cable changes，Bi-Direction passive no need power

S1 4 Way RCA Audio Switch Stereo Switcher Selector Box | 4 IN 1 OUT you quickly sw between 4 audio sources in, avoiding frequent cable changes，Bi-Direction passive no need power

Product ID: 210394514

Details

Brand
SOLUPEAK
Cable Type
RCA
Color
4-WAY RCA IN 1
Compatible Devices
Compact Disc
Connector Type
RCA

💎Gold-plated RCA for lossless signal

🔄4 stereo inputs, 1 output

🛡️Solid aluminum CNC knob & shell

Bs.2971

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Sold byAmazon BoliviaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎧 Elevate your audio game—switch like a pro, hear like an audiophile!

COMPACT YET ROBUST - Space-saving 110x130x50mm footprint with a hefty 650g solid build that stays put even with thick cables.
PLUG PLAY PASSIVE DESIGN - No power supply needed—just connect and switch, perfect for minimalist setups and zero noise interference.
AUDIOPHILE GRADE BUILD QUALITY - Crafted with a thick 6mm aluminum front panel and CNC-machined knob for durability and premium tactile feel.
SEAMLESS 4 IN 1 AUDIO SWITCHING - Effortlessly toggle between 4 stereo sources with a smooth rotary knob—no signal loss, no fuss.
VERSATILE MULTI ROOM MULTI DEVICE READY - Ideal for managing multiple audio sources or distributing the same signal across rooms with ease.

The SOLUPEAK S1 4-Way RCA Audio Switcher is a premium passive audio selector designed for professionals and enthusiasts alike. Featuring gold-plated RCA connectors and a CNC-machined aluminum knob housed in a sturdy aluminum shell, it ensures lossless signal transmission across four stereo inputs to one output. Its compact, power-free design offers seamless switching without degradation, making it the ultimate solution for multi-source audio management in home or multi-room setups.

Specifications

ASIN	B085W1PPHL
Audio Output Mode	Stereo
Best Sellers Rank	#68 in Audio & Video Selector Boxes
Brand	SOLUPEAK
Cable Type	RCA
Color	4-WAY RCA Switch(4 IN 1 OUT)-Upgrade version
Compatible Devices	Compact Disc (CD) Player, DVD Player, Laptop
Connector Type Used on Cable	RCA
Customer Reviews	4.3 4.3 out of 5 stars (240)
Item Dimensions D x W x H	5.12"D x 4.33"W x 1.97"H
Item Weight	620 g
Manufacturer	Zhuogang
Mfr Part Number	S1
Model Number	S1
Number of Ports	4
UPC	659438712254

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TrustScore 4.5 | 7,300+ reviews

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Bs.2971

Duties & taxes included

In stock

Sold byAmazon BoliviaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Bolivia.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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