My unit has stopped working. Mini input jack may be bad. How do I return for replacement? purchased 9/2/22

Try a new supply for cable to usb ie another high power charger.

Can this amplify a video signal to allow splitting on multiple viewing screens ?

No. It is for audio only (and in my opinion, doesn't even do that well). You need a device that is specifically for video, like this: https://www.amazon.com/MT-VIKI-Splitter-Composite-Distribution-Amplifier/dp/B0882RHYTW/ This will take a composite video input, amplify it, and provide multiple outputs. It also does the same for the associated audio inputs.

What are the exact dimensions of the power connector? The connector has 2 dimensions, the outer diameter and the inner pin diameter (5.5 mm x?)

I don't know. My Mini Stereo Line Level Amp stopped working the second week I owned it. I recommend buying something else.

Will it give a full 2 volt line out RCA signal

So long as the input level is sufficient to create a 2V output signal, the answer is yes. If the input signal is not of sufficient amplitude it will/can not.

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Mini Stereo Line Level Booster Amplifier Preamp 20dB Gain Volume Control

Product ID: 374052515

Details

Voltage
26 Volts (DC)
Manufacturer
Douk Audio
Maximum supply voltage
24 Volts
Minimum supply voltage
5 Volts (DC)
Mounting type
Surface Mount

⚡DC 5-24V Input

🔊20dB Gain

🎛️HiFi Op Amp

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€ 89.48

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Sold byAmazon SlovakiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎶 Amplify Your Audio Experience!

BOOST YOUR SOUND - Elevate low-volume audio sources to new heights with a powerful 20dB gain.
VERSATILE CONNECTIVITY - Multiple input/output options ensure compatibility with all your favorite devices.
COMPACT DURABLE DESIGN - All-metal construction shields against interference while looking sleek.
PERFECT FOR ANY OCCASION - Ideal for home systems, parties, or live events—take your audio anywhere!
CUSTOMIZABLE AUDIO EXPERIENCE - Easily swap op amps for a tailored sound that fits your unique taste.

The Douk Audio Mini Stereo Line Level Booster Amplifier Preamp features a 20dB gain volume control, multiple input/output interfaces, and a compact all-metal design. It supports a wide input voltage range of DC 5-24V and offers customizable sound through its NE5532P op amp. Perfect for enhancing audio in various settings, this amplifier is a must-have for audiophiles and casual listeners alike.

Specifications

ASIN	B08L4WYSZ4
Best Sellers Rank	#25,388 in Electronics ( See Top 100 in Electronics ) #127 in Audio Component Amplifiers
Brand	Douk Audio
Brand Name	Douk Audio
Customer Reviews	4.1 out of 5 stars 331 Reviews
Manufacturer	Douk Audio
Maximum Supply Voltage	26 Volts (DC)
Minimum Supply Voltage	26 Volts (DC)
Model	XZ-L1
Mounting Type	Surface Mount
Number of Channels	2
Output Power	12.5 Volts
Part Number	XZ-L1
Unit Count	1.0 Count

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