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This 3D Sound simple module audio processor has active component 8-pin DIL PT2387 IC chip, PT2387 is a 3D effect audio processor IC utilizing CMOS technology, features a specially designed PTC HRTFs Filter and space-enhanced circuit.
the 3D sound effect module also known as Spatializer.
the overall result is good, for best result its recommend this 3D sound module is paired with Hi-Fi stereo source device, I have tested with audio source coming from Lenovo Vibe K4 Note (Dolby Atmos) and play Music on Sony Xperia Z3 (Sony DSEE HX VPT).
with proper amplifier, this module works well both on headphone and 2.1 speaker system.
this module works from any Stereo source input, IE:
Qwerty phone, Android smartphone, iPhone, DAP, Walkman, mp3 player, mp4 player, FM stereo radio, TV, laptop, PC, DVD player, etc.
In my video above, you can find the circuit, PCB layout and test demonstration.
you can make some headphone amplifier with 3D effect feature with just add this module on your headphone amplifier..