Mini amplifiers usb in comparison

Compact Design Built with a sleek, aluminium matte finish, this portable headphones amplifier is both durability and stylish. Its lightweight and compact design means you can enjoy superior sound anytime, anywhere, without compromising on performance

Bluetooth connectivity

Multi-Interface Connectivity Equipped with 5 audio inputs (Bluetooth, PC-USB, U-disk, RCA, coaxial, optical) and 3 outputs (speaker jacks, 3.5mm AUX, headphone jack) for seamless integration with a variety of home audio devices. such as phone, computer, tablet, MP3, TV, CD player etc..

AK45 HiFi Stereo Amplifier AK45 hifi bluetooth amplifier can provide 40W + 40W rated power and 300W + 300W peak power, 2.0 channel, match for 4-16 passive speakers; distortion Rate 0.5%, signal-to-noise ratio 85db, strong anti-interference ability, shielding power inductance, low noise amplifier, HiFi stereo sound effects, you can enjoy more immersive experience

There is no doubt that both can be connected. When you connect passive speakers, this AMP is a Bluetooth power amplifier; when you connect active speakers, this AMP is equivalent to a Bluetooth receiver. It should be noted that two types of speakers cannot be connected at the same time.

Universal Bluetooth Amplifier Suitable for various brands of wall mounted speakers, ceiling mounted speakers, marine speakers, bookshelf speakers, and other passive speakers

As a useful addition to its HiFi function and home cinema function, it has two microphone inputs on the front that you can chat at PA events, karaoke parties or meetings.

Computer sound card function it can output a signal with better sound quality than the computer to connect to the speaker to play.

HiFi Digital Power Amplifier -- Audio Amplifier Adopts Professional TPA3221 Amplifier Chip and DAC Chip, Supporting Treble, Midrange, Bass Adjustment, Delivering High-performance Audio Amplification and Signal Conversion, Ensure the Clear Audio Signals and Strong Output Power

Mini USB to USB UGREEN Mini USB Cable is ideal for connecting devices with a Mini USB 5Pin connector on your PC to a USB 2.0 port. It allows you to transfer the data and charge your devices. Please make sure your device has a Mini USB port, NOT Micro USB.

RCA Input ,Can be plug in with Ipod,MP3 MP4

Master Volume Adjustment The improved compact bookshelf speaker sound amplifier features crisp and responsive buttons for the power switch. It also features rotary knob control for the master volume adjustment.