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H4 Pro

H4 Pro

Compact Headphone Amplifier with EQ

Well, for professional users, H4 is limit, because you are not able to mix the input source, we made this pro version, which allows you to have better EQ well adjusting the bass and treble effect. And we use USA audio chip to improve the sound level as well.

* Both 1/4” TRS and 1/8” TRS output jacks work at the same time, when you plug 2nd headphone, the volume getting lower, because they share the some amp.


Power Adapter (DC12V, 500mA) x1pc


Input:  1/4” TRS

Input Impedance: 100K Ohms

Output: 1/4” TRS x4, 1/8” TRS x4

Output Impedance: 80 Ohms

Output Power: RL=16 Ohm, THD+N=1%   100 mW

              RL=32 Ohm, THD+N=1%   125 mW