Thx aaa headphone amplifiers in comparison

WIDE COMPATIBILITY Portable HiFi earphone amplifier has a wide range of compatibility, can be paired with MP3, MP4, Phone, music player and many other devices.

Compact headphone distribution amplifier with stereo input and individual volume control for up to 4 stereo headsets.

Portable and Lightweight Designed to be portable and lightweight, this headphone amplifier allows you to enjoy music anytime, anywhere. Its sturdy aluminum alloy casing ensures durability for long term use.

* *----- Our eSynic Portable Headphone Amplifier is Delicate, Compact, Lightweight, and Portable that It can be Carry Conveniently. Aluminum Matte Surface and Fashion Design Provides You a Comfortable Handheld Feeling. and More Sturdy with No Signal Interference.Great Heat-Resistance, Stable Performance Durability and High Quality Ensured.

* , & *--- The Metal Portable Headphone Amplifier DAC with a Compact Size, Lightweight and Easy to Carry. The Amp for Headphones Adopts Aluminum Alloy Casing, Sturdy and Anti-Interference. With Plug-And-Play Functionality, Allowing for Instant Audio Playback.

The most competitive and cost-effective desktop balanced DAC Amp within the 300-USD range;

Deliver the highest audio quality with virtually all types of headsets and earphones include the larger over ear headphones even at maximum volume; Adding an amp between the player and your audiophile headphones can provide a significant, audible improvement in clarity, detail and dynamics

Studio Grade Amplifier & Bass Boost Breathe new life in to your favorite headphones anywhere you want to go. Serious power in the palm of your hand with 6+ hours of continuous play time on a full charge and inline controls.

Versatile Connectivity Supports both Bluetooth and 3.5mm wired input. Experience high-fidelity, low-latency music anytime and anywhere. Also functions as a desktop Bluetooth receiver and amplifier, making it an ideal partner for HiFi headphones.

Audiophile-grade portable Hi-Fi sound from Cirrus Logic CS43131 with low power consumption, make your music more powerful.

Audio channel balance control trim range 10dB+

Rechargeable lithium battery - Adopts 1000mAH rechargeable lithium battery, which can make the headphone amplifier work for more than 8 hours. In addition, there is a volume control knob to adjust the volume.