Bon 11-192 Brick Set - 4-in. X 7-in.

FiiO/Snowsky Tiny Portable DAC & Headphone Amplifier, Hi-Res USB DAC, PEQ Precision Tuning, PCM 384kHz/DSD256 Decoding, Android App/Web Control (3.5mm + Type-C Dual Ports, Tiny A Black)

FiiO K13 R2R Desktop DAC & Headphone Amp, High-Fidelity 24Bit R2R DAC, Powerful 2400mW Output, LDAC Bluetooth Streaming, Dual Power Supply, 10-Band PEQ, Balanced XLR & RCA Audio Output (Black)

FiiO BTR13 Bluetooth Headphone Amplifier with LDAC, aptX Adaptive, aptX HD, AAC (Dual CS43131 3.5mm Unbalanced & 4.4mm Balanced Output) (Black)

FiiO Snowsky Wind 3.5mm ON-Ear Headphones for Recording Gaming with Microphone, 40mm Diaphragms Driver,HiFi Sound (Silver)

FiiO DM13 Multifunctional Portable Stereo CD Player with Long-Lasting Battery, Supports USB Ripping, Optical/coaxial/3.5mm/4.4mm outputs (Silver Bluetooth)

FiiO BTR17 Bluetooth 5.4 USB DAC AMP with LDAC, aptX Lossless. Dual ES9069Q, 10-Band PEQ, THX AAA 78+amps 3.5mm Unbalanced & 4.4mm Balanced (Black)

FiiO BTR11 Bluetooth 5.3 Receiver LDAC 3.5mm Built-in Mic Wireless Audio Headphone Amplifier Adapter (Black)

FiiO KA15 Portable DAC and Headphone Amplifier (Blue)