Qudelix-5K Bluetooth USB DAC AMP with LDAC, aptX Adaptive, aptX HD, AAC (Dual ES9219 3.5mm Unbalanced & 2.5mm Balanced Output)

MOONDROP Dawn Pro Portable USB DAC/AMP Dual CS43131 DAC 32Bit/384kHz DSD256 Decoder Headphone Amplifier

LZSIG Headphone Amplifier 4 Channel Metal Stereo Audio Amplifier,Mini Earphone Splitter with Power Adapter,1/4" & 1/8" TRS Headphones Output and TRS Audio Input for Sound Mixer,DC 12V

FIIO K11 Desktop 1400W Power Balanced Headphone DAC & Amplifier 384kHz/24Bit DSD256 for Home Audio/PC 6.35mm/4.4mm/RCA/Coaxial/Optical (Black)

Mackie HM-4 Headphone Amplifier

Behringer MicroAMP HA400 4-channel Headphone Amplifier (HA400d1)

Neoteck Portable 3.5mm Headphone Amplifier Two-Stage Gain Switch, 16-150 Ohm, Aluminum Matte Surface

LVY Headphone Amplifier A010 Portable Headphone Amp 3.5mm Audio Rechargeable Two-Stage GAIN Switch HiFi Headphone Amplifier Compatible MP3/4, Phones, Computer and Various 3.5mm Audio Digital Devices

Fender Mustang Micro Headphone Amplifier, with 2-Year Warranty

eSynic Professional 16-300Ω Headphone Amplifier 3.5mm Portable Headphone Volume Amplifier Rechargeble Headphone Amp Aluminium Alloy Headphone Jack Amp With Gain Switch Function for Phones Laptop etc