Class A Portable Headphone Amplifier Fever-grade High-thrust HIFI Headphone Power Amplifier Large-capacity Battery 2134 Op Amp

Pure Class A portable amp fever headphone amplifier hifi high thrust power rechargeable


product description

1: Low noise power management circuit, integrated lithium battery charge management and boost circuit
Each channel uses a pair of industry-recognized audiophile pairs, MJE15032 and MJE15033, which have the title of "Tube King".

2: Powered by high-quality Panasonic 18650 lithium battery, with a large capacity of 3400 mAh, it is more reliable and stable than ordinary laminated lithium batteries.

3: Only high voltage can produce good sound. A dedicated boost circuit will boost the lithium battery 3.7V to 12V for the op amp stage and the pure class A current amplifying stage, and the sound bottom is pure.

4: Why are there fewer real pure class A circuits in portable amps? We all know that pure class A circuits are the most power-consuming of all amplifier types, but the sound quality is also the best. Many portable amps are small or micro-armored. It's just that some compromises have to be made in order to meet the battery life. As the most power-consuming pure Class A portable amp among the amplifier circuit types, the B2 can also listen to songs continuously for 18 hours.

5: Carefully select the volume potentiometer to ensure the balance of the left and right channels in the low volume state. Even the ALPS potentiometer is difficult to achieve this.

6: Why does the sound sound good? Not only is it a pure class-A circuit structure, but more importantly, the acyclic negative feedback, rich in mid-high frequency details and high resolution, combined with the extremely low distortion characteristics of the 2134 op amp, the sound field is wide and the music is very real.

7: The op amp socket is designed, which can be directly plugged and replaced.

8: Very low noise circuit structure, can be used as a desktop amp, while charging, listening to songs (recommended to use a linear power supply to prevent noise floor)


Product parameters

Model: B2
Output power: 900mW/32Ω; 350mW/150Ω
(1KHz sine wave equivalent undistorted power)
Headphone load range: 16-300Ω
Frequency response: 20Hz~30KHz
Distortion rate: 0.0037%
Signal-to-noise ratio: 103dB
Battery capacity: 3400mAh
Battery life: about 18 hours of continuous playback
Charging port: TYPE-C fast charging interface
Charging time: about 3.5 hours
Input/output port: standard 3.5mm headphone jack
Op amp chip: 2134 (op amp seat design, op amp can be pluggable and replaced)
Size: 67*120*26mm
Net weight: 0.2Kg
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