Can this device simultaneously play audio from two different inputs or does it only switch in between the two audio inputs?

It only switches between the two audio inputs. It cannot mix or play two inputs together. I use it in reverse, with the audio from my computer connected to the OUT jack, with computer speakers connected to A, and headphones connected to B. Works great!

Can I turn off switch and hear or overlap all three input devices (computers) at the same time?

There is no off position on the knob, you can only switch between the 4 inputs, just one at a time, you cannot overlap or channel more than one at a time. This is a very solid high quality audio switch, I use it for my turntables setup.

Does this support 4 pole? Specifically can a headset with a mic be plugged in to an output and transmit to an input computer?

I am fairly but not absolutely certain the answer is no. I don't particularly want to disassemble mine to check for sure but it's open construction gives some visibility into how many solder connections there are to the input and output jacks. Between that and what people say about it comments, and the product description -- pretty sure, no. That could be a nice product, though.

Can this be used for a phono signal (not line)?

If the phono signal is already at line level (amplified though a preamp with the required R.I.A.A. curve, the answer is yes. Otherwise, no.

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Gohifiaudio SOLUPEAK 3 in 1 Out RCA Stereo Audio Source switcher Switch Signal selector Splitter schalter Connector Distributor Box

Product ID: 321548058

Details

Brand
SOLUPEAK
Cable type
RCA
Colour
3 ports RCA
Compatible devices
DVD Player
Connector type
RCA

⚡Passive design, no power needed

🔄3-in-1 input & 1-in-3 output versatility

🔇Instant mute button for silent switching

€ 64.17

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Sold byAmazon SlovakiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎧 Switch Smart, Stay Connected — Your Audio Command Center

MUTE ON DEMAND - Hit the red mute button to instantly silence your audio without unplugging—perfect for discreet moments.
ZERO POWER HASSLE - Completely passive operation means no external power supply or batteries required—plug and play simplicity.
COMPACT LIGHTWEIGHT - At just 115x65x45mm and 100g, it fits perfectly into any professional or home audio setup without clutter.
UNIVERSAL COMPATIBILITY - Works flawlessly with CD players, TVs, DACs, amplifiers, and more—streamline your entire audio ecosystem.
SEAMLESS MULTI SOURCE SWITCHING - Effortlessly toggle between 3 audio inputs or distribute 1 input to 3 outputs with a smooth rotary dial.

The Gohifiaudio SOLUPEAK 3-in-1 RCA audio switcher is a compact, passive device designed to simplify managing multiple audio sources and outputs. Featuring a smooth rotary switch and an instant mute button, it requires no power supply and supports versatile configurations (3 inputs to 1 output or 1 input to 3 outputs), making it ideal for professionals and audiophiles seeking seamless control over their sound environment.

Specifications

ASIN	B085Y96LHZ
Brand	SOLUPEAK
Cable Type	RCA
Color	3 ports RCA stereo audio switch(3-IN-1-OUT)
Compatible Devices	DVD Player, Television
Connector Type Used on Cable	RCA
Customer Reviews	4.1 4.1 out of 5 stars (176)
Item Dimensions D x W x H	6D x 10.8W x 4.5H centimeters
Item Weight	0.1 Kilograms
Manufacturer	Zhuogang
Model Number	AS31
Number of Ports	3
UPC	659438712261

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€ 64.17

Duties & taxes included

In stock

Sold byAmazon SlovakiaDelivered 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 Slovakia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

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Smooth transaction and product arrived in perfect condition.

3 weeks ago

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