AudioQuest - DragonFly Red USB DAC/Headphone Amplifier

Anker USB-C to USB 3.1 Adapter, Converts USB-C Female into USB-A Female, Uses USB OTG Technology, Compatible with Samsung Galaxy Note 8, S8 S8+ S9, iPad Pro 2018, Nexus 6P 5X, LG V20 G5 and more

iFi Audio OTG Cable/Adapter for USB C for Android Phones/Digital Audio Players (DAPs) / Digital Analog Converters (DACs) / Amps/Laptops

Sennheiser HD 660 S - HiRes Audiophile Open Back Headphone

Audioquest Evergreen Audio Interconnect 1m (3 feet 4inches) 3.5mm to RCA

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

Schiit Loki Tone Control Equalizer

USB Camera Adapter for iPad iPhone, HENKUR OTG Cable Compatible with iPhone X Max 8 7 6 6S Plus iPad Mini, USB 2.0 for USB Flash Drive, Keyboard File Photo Video Sync, Support iOS 9.2 to 13 (White)

Schiit Magni 3 Headphone Amp and Preamp

FiiO FH7 5-Drive (1DD + 4BAs) Hybrid in-Ear Earphones/Headphones with DIY Sound Filters,High Fidelity for Smartphones/PC/Tablet (Black)

Audioquest JitterBug USB Data and Power Noise Filter - 2 Pack