Amplifiers with usb input in comparison

Discrete LNRD How to solve the noise problem of 5V power supply? The E30 II's answer is the Discrete LNRD circuit (low noise reference driver). The Discrete LNRD circuit filters out the noise of various 5V power input and provides a stable power supply of ultra-low noise reference level for E30 II. With this technology, the noise floor of E30 II is lower than 1 .5uV.

Getting ten crossover frequency points adjustable for High-pass and low-pass each. Subwoofer's volume can set it separetely,which perfectly can use well for different main speaker and passive subwoofer and build your real 2.1 speaker system.

Stereo Amplifier This AK45 Bluetooth amplifier is compact but packs a lot of punches! Provides 2.0 channel stereo with rated power of 40W+40W. Effectively improve the audio quality, providing clear and smooth sound without impurities. Wireless Bluetooth, easy to connect smart phones, tablets and other Bluetooth devices. Let you enjoy high quality music.

Simple and elegant design With treble and bass adjustment of 12 dB and EQ effect, the sound is more delicate, compact and powerful internal layout,to ensure HiFi clear and pure sound, exquisite appearance and with LED Large display screen and remote control design bring you different enjoyment

High-Quality Components SMSL AO300 uses MA5332MS power amplifier chip and CS43131 decoding headphone amplifier chip to provide clear and accurate sound output

Seamless Bluetooth Pairing & Karaoke Ready Equipped with Bluetooth 5.0, this amplifier allows effortless pairing and maintains a stable connection up to 40 feet 10 meters. Perfect for wireless music streaming and karaoke with 2*microphone inputs, turning any gathering into a fun-filled event.

Karaoke & Audio Control Features Built-in mic echo, tone, and volume rotary controls bring professional DJ and karaoke functions into your living room or studio

HIFI mono amplifier board This ZK-1001B mini Bluetooth audio amplifier board is a mono channel amplifier with 100W rated power, only contact with a passive speaker (20-100W, 3-8 ), DC7-24V 3A above. This mono ampfilier with a TPA3116D2 chip, distortion rate below 0.3%, and another upgrade large chips support AAC BT decoding, app and TWS, low latency

User-Friendly Design Featuring intuitive controls and a sleek black finish, the Fenton AV430B is easy to use and looks stylish in any home or professional audio setup.

EQ CONTROLS The stereo receiver with bluetooth has rotary knob and crisp buttons for treble, bass, master volume, echo, mic volume, mic tone configuration & source input selector. A remote control is also included in the package for distant control.

* *------ This eSynic 3.5mm Headphone Amplifier items Adopts a Rechargeable Lithium Battery With 1200mah Capacity, which Allows It to Stay Working More Than 5 Hours. Compatible with a Various Of Digital Devices, Such as Mp3 Mp4 Mobile Phone Computer.

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