K4 DAC Headphone Amp with Treble & Bass Control – Fosi Audio

The Fosi Audio K4 DAC Headphone HI FI Mini Stereo Preamplifier - Enhance your gaming experience with adjustable treble and bass control.

Fosi Audio K4 Mini Stereo DAC Compact Digital Amplifier User Manual

Fosi Audio Q4 Headphone Amplifier Mini Stereo DAC 24-Bit 192 KHz USB Optical Coaxial to RCA AUX Digital-to-Analog Audio Converter Adapter for Home Desktop Powered Active Speakers : Electronics

Fosi Audio Q4 Mini Stereo Gaming DAC & Headphone Amplifier

Bluetooth Vacuum Tube Subwoofer Stereo Audio Amplifier 50w Ne5532 Portable Headphone Amplifier For Home Desktop Speake - Home Theater Amplifiers - AliExpress

FOSI Audio Q4 DAC:Amp Review!

Fosi Audio K5 PRO DAC/AMP/EQ - More Versatile Than A MultiCooker — Audiophile Heaven

K3 Headphone Amplifier - DAC USB DSD COAXIAL RCA AUX – Fosi Audio

The Q4 DAC headphone amplifier is a versatile device that can connect with most home audio systems and headphones. It has various inputs, a 3.5mm headphone output, and a Hi-Fi headphone amp chip that can power headphones with impedance ranging from 16 Ohm to 200 Ohm. However, it doesn't support microphones. The device also has an RCA output to connect to an amplifier or powered speakers on a desktop.

Fosi Audio Q4 Headphone Amplifier Mini Stereo DAC 24-bit 192 kHz USB Optical Coaxial to RCA Aux Digital-to-Analog Audio Converter Adapter for Home

K4 DAC Headphone Amp with Treble & Bass Control – Fosi Audio

Fosi Audio K5 PRO DAC/AMP/EQ - More Versatile Than A MultiCooker — Audiophile Heaven

K4 DAC Headphone Amp with Treble & Bass Control – Fosi Audio