Ultrasone Pro 1480i Black UL 12027

Ultrasone PRO 1480i S-Logic Plus Surround Sound Professional Open-Back Headphones

FiiO FT1 Closed-Back Over-Ear Nanowood Fiber Composite Diaphragm Wired Hi-Fi Headphones, Detachable Cable, American Black Walnut Wood Ear Cups for Home, Studio, Recording (Black)

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