Does it come with the USB wall adapter (brick)?

Mine did not have wall adapter, only USB cable, works fine off USB so far.

Can I use an iPad charger to power it, or what amperage power supply do I need?

No, It is DC 5V power input interface,and the package will included a charger wire.hope you can know it,thanks

Are those coaxial input interface input compatible to stereo?

These digital inputs are bitstreams. The bitstream can be decoded to multiple channels with augmentation - For example, Dolby. In this case your converting a digital bitstream to analog stereo. Rock On... J H

Can i use the usb input to playback music, then output using the optical connector to my powered speakers?

The optical connector is for incoming signals only. The only signal outputs are the headphone jack and the RCA terminals, converted to analog by the unit's internal DAC. If your powered speakers have RCA inputs, that would work. You would not be using the DAC in your powered speakers, if they are so equipped.

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AIYIMA DAC-A2 Headphone Amplifier DAC with Bass Treble Controls PC-USB/Optical/Coaxial Inputs, RCA/3.5mm Headphone Ouput Digital to Analog Desktop Audio Converter DC 5V 24Bit 192kHz

Product ID: 146439637

Details

Brand
AIYIMA
Maximum Supply Voltage
5 Volts
Minimum Supply Voltage
5 Volts (DC)
Mounting Type
Cable Mount
Number of Pins
6

🎧Drives 16-200Ω Headphones

🔊24Bit/192kHz Hi-Res Audio

🎚️Bass & Treble Controls

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₩133460

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Sold byAmazon South KoreaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎧 Elevate your sound game—because your ears deserve the best!

HI RES AUDIO PRECISION - Experience crystal-clear 24Bit/192kHz sound for your desktop setup.
VERSATILE CONNECTIVITY - Seamlessly switch between PC-USB, Optical, and Coaxial inputs to match any device.
POWERFUL HEADPHONE DRIVE - Effortlessly powers headphones from 16 to 200 ohms for rich, immersive audio.
COMPACT PORTABLE DESIGN - Sleek metal build with DC 5V power input fits perfectly on any desk or audio station.
CUSTOMIZABLE SOUND PROFILE - Fine-tune your listening with dedicated bass and treble controls—your music, your way.

The AIYIMA DAC-A2 is a compact, professional-grade headphone amplifier and DAC that supports high-resolution 24Bit/192kHz audio. It drives a wide range of headphones (16-200Ω) and offers versatile input options including PC-USB, Optical, and Coaxial. With dedicated bass and treble controls, it allows personalized sound tuning. Powered by a DC 5V input and housed in a durable metal chassis, it’s designed for desktop use, delivering clear, immersive audio for audiophiles and professionals alike.

Specifications

ASIN	B07TBF488G
Audio Output Mode	Analog (RCA, 3.5mm)
Best Sellers Rank	#33,146 in Electronics ( See Top 100 in Electronics ) #63 in Headphone Amps
Brand	AIYIMA
Brand Name	AIYIMA
Compatible Devices	PC, MAC, Linux, home audio systems, devices with PC-USB, Optical, or Coaxial inputs
Customer Reviews	4.2 out of 5 stars 415 Reviews
Interface	Coaxial, USB
Interface Type	Coaxial, USB
Item Dimensions L x W	3.86"L x 2.89"W
Manufacturer	AIYIMA
Material Type	Plastic
Maximum Supply Voltage	5 Volts
Minimum Supply Voltage	5 Volts (DC)
Model	DAC-A2
Mounting Type	Cable Mount
Number of Channels	1
Number of Pins	6
Part Number	DAC-A2
Smart Home Compatibility	Not Smart Home Compatible

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