Cardas Audio HPI-A Audiophile Adapter Cable Female 1/4" 6.3mm to Male 1/8" 3.5mm TRS Mini-Plug, 6" (155mm), Compatible with MP3 Player, Smartphone, Laptop, Personal Computer

AudioQuest - Dragonfly Cobalt USB DAC/Headphone Amplifier

CARDAS AUDIO CROSS Upgrade Headphone Cable fit SENNHEISER HD650 HD660 S HD6XX HD600 HD580 HD565 HD545 HD535 HD525 HD265 - 3M (10ft) Cord with 1/4" Plug

Sennheiser Cable Adapter Female 1/4" 6.3mm to Male 1/8" 3.5mm Plug

Grado Mini Adaptor

MOBILE FIDELITY SOUND LAB INNER SLEEVES - MOFI MFSL (50 RECORD SLEEVES)

AudioQuest - Jitterbug USB Filter

AudioQuest - DragonFly Red USB DAC/Headphone Amplifier

UGREEN 3.5mm 1/8" TRS to Dual 6.35mm 1/4" TS Mono Stereo Y-Cable Splitter Cord Compatible for iPhone, iPod, Computer Sound Cards, CD Players, Multimedia Speakers and Home Stereo Systems 6FT

FiiO BL44 4.4mm Mail to 2.5mm Female Balanced Cable

CARDAS AUDIO HPI Audiophile Interconnect Cable Adapter Male 1/8" 3.5mm TRS Right Angle Mini-Plug, Length 6"