YGiTK Headphone Amplifier with 3 Input Mute Audio Mixer Function Power Adapter,4 Channels Mono/Stereo Switch Audio Amplifier Mini Earphone Splitter 1/4" & 1/8" TRS Headphones Output and AV Input 45.99$
FIIO JadeAudio KA1 Headphone Amps Tiny Amplifier USB DAC High Resolution Lossless for Smartphones/PC/Laptop/Players(Lightning, Black) 69.99$
Topping L70 Fully Balanced NFCA Headphone Amp - 4-Pin-XLR/4.4mm Balanced/6.35mm SE Headphone Jacks Amplifier 7500mW x 2 Ouput R2R Volume Control HiFi Amp Audio Hi-Res Preamplifier(Black) 499.00$
S.M.S.L DS100 USB MQA DAC with CS43131 Chip 6.35mm & 4.4mm Headphone Amplifier Support MQA MQA-CD XMOS XU-316 32bit/768kHz DSD256 USB/Optical/Coaxial Input Mini USB DAC THD+N 0.00017% 119.99$
FiiO NEWK3 Amplifier Headphone Amps Portable High Resolution 384kHz/32bit DSD256 USB Type-C Lossless for PC/Laptop/Smartphones/Speaker Home Audio 148.02$
FiiO KA5 USB DAC Headphone Amp dongle Volume Control PCM 768kHz DSD 256 Headphone Outputs 3.5mm/4.4mm for Android/iOS/Mac/Windows 179.79$
HELM Bolt DAC/AMP, USB-C Portable High-End DAC/Headphone Amplifier with MQA Playback. Mobile Studio Sound for Android, iOS and PC. USB-C to 3.5mm Audio, THX Certified 149.99$