Headphone Inventory:
Audio Technica ATH-R70X
beats by dr. Dre Studio 1st gen
beats by dr. dre Solo HD Red Special Edition
Beyerdynamic DT 990 Pro
Grado Labs SR80X
HIFIMAN HE400SE
Kevler HD-101
Koss KSC75 Modded with Parts Express Headband and MMCX
Philips SHP9500
Razer Kraken Pro V2
Sony MDR-CD900ST
Sony MDR-XB950AP EXTRA BASS
Sennheiser HD600
Sennheiser Momentum Headphones
Shure SRH440


Wireless Inventory:
Anker Soundcore A20i
Anker Soundcore Liberty 2 Pro
Apple airpod gen 1
KZ Z3
Philips Fresh Tone
Raycon E25
Samsung Galaxy Buds2
Samsung Galaxy Buds2 Pro
Sennheiser Momentum 2.0 IE
Sennheiser Momentum 3 HP
Sennheiser Momentum True Wireless 3 IE
SkullCandy Crusher
Sony WF-1000XM3
Sony WH-1000XM3


In-Ear Inventory:
7hz Timeless
Audio Technica ATH-CK350X
Awei Es-Q7
beats by dr. dre iBeats
beats by dr. dre Powerbeats 2
beats by dr. dre Tour
Blon BL-03
CCA CRA
Coloud Pop
Final E1000
Final E500
Hoco IEMs
KZ EDA Bass, Balanced, Hi Res versions
KZ EDX
KZ ZS5
KZ ZSN Pro X
Logitech IEMs
Moondrop Aria
Moondrop Blessing 2
Moondrop Chu
Moondrop Variation
Panasonic RP-HS200-K
QKZ VK4
Radius HP-NEF11
REMAX IEMs
Salnotes Zero
Samsung AKG EO-IG955
Samsung EHS64
Sennheiser CX180
Sennheiser CX300
Sennheiser IE-40 Pro
Sennheiser Momentum in Ear
Shure SE215
Skullcandy IEMs
Sony Ericsson MH1c
Sony MDR-EX255AP
Sony MDR-300AP
Sony MDR-EX15AP
Sony MDR-XB55AP EXTRA BASS
Sony MH750
TRN MT1 Pro
Tin HiFi T2
Truthear Zero Red
Xiaomi Mi Pro HD
Xiaomi Piston 2


Earbuds Inventory:
ABnormal Sounds Duotres
Aiwa HP-V14
Apple Earpods
audio-technica ATH-J100
Awei Earbuds
Bag-O Audio Custom Earbuds
Bavin Earbuds
Cat Ear Mimi
DoCoMo Earbuds
Dunu Alpha 3
Earbud Customart Naga
Elecom EHP-FS10IMBK
FAAEAL Rosemary
Fake Wired iPhone Airpods Gen 3 Clone
Fengru DIY EMX500 Modded
Fiio FF3S
Headroom MS16
Hoco Earbuds
Heavenly Sounds symphony
JVC HP-F140-D
KAPH Earbuds
Kobe Audio Custom Earbuds
Ksearphone Bell-LB
Kube Earbuds
LG Earbuds MMCX Modded
Lrey Audio R09 Grado Brass Edition Modded
Larry Audio R09 Grado Wood Edition
Nicehck EB2S
Nicehck Traceless R&B
Nokia HDS-3
Nokia WH102
SEN FR PT15
Ocean Pearl OP-139
Oppo Earbuds
Philips SHE3010
Phillips SHE3800
Phrakar 185Ohms
QianYun Qian39
QianYun Qian69
Qigom Black Lotus S300
QKZ MDR
Realms Earbuds
REMAX Earbuds
RY4S 300 ohm
RY4S Plus 32 ohm
Samsung EG-920
Samsung EHS61ASFBE
Sennheiser MX365
Sennheiser MX375
Sony Ericsson HPM-64 Bass Reflex
Sony MDR-AS210
Sony MDR-E9LP
Sony MH410c
TOPK Earbuds
TRN EMA
Tingo TC200
Urbanista SF hybrid
Venture Electronics Monk A1
Venture Electronics Monk Slim Metal
Venture Electronics Monk+
Vido Black
Vido Blue
Vido Red
Vido White
Vido Transparent Purple
Vido Transparent Green
Willsound PK32
Xiaomi Dual Driver
Yincrow X6 Red


DIY Inventory:
DIY 120Ohm 14.8 Beryllium in PK Shell Unnamed
DIY 120Ohm 15.4 Beryllium Collab with Jeejack
DIY 120Ohm 15.4 LCP Unnamed
DIY 130Ohm 15.4 Beryllium "Demon Core"
DIY 130Ohm 15.4 Beryllium Metal shell Unnamed
DIY 130Ohm 15.4 Beryllium Open Back Unnamed
DIY 150Ohm 14.8 Redfilm in DoCoMo Shell "Seraph"
DIY 150Ohm 14.8 Redfilm in PK Shell Unnamed
DIY 150Ohm 15.4 WG Unnamed
DIY 150Ohm15.4 BG aka "George"
DIY 300Ohm 15.4 BG
DIY 300Ohm 15.4 Blue PET "Azure "
DIY 300Ohm 15.4 CNT Unnamed
DIY 300Ohm 15.4 DLC Unnamed
DIY 32Ohm 14.8 Redfilm in PK Shell Unnamed
DIY 32Ohm 14.8 Static Electricity I in DoCoMo Shell Unnamed
DIY 32Ohm 14.8 Static Electricity II in DoCoMo Shell Unnamed
DIY 32Ohm 14.8 Titanium in PK Shell Unnamed
DIY 32Ohm 15.4 19-21 Black Dot Bio Cellulose Unnamed
DIY 32Ohm 15.4 19-21 Purple Dot Titanium Unnamed
DIY 32Ohm 15.4 19-21 Red Dot Beryllium Unnamed
DIY 32Ohm 15.4 19-21 Red Dot Unnamed
DIY 32Ohm 15.4 BG Unnamed
DIY 32Ohm 15.4 Green Glue Unnamed
DIY 32Ohm 15.4 ShoonTH ESEP-01BL Clone
DIY 500 15.4 Beryllium Big Open Back (Repurposed)
DIY 600Ohm 15.4 Beryllium Open Back V3
DIY 64Ohm 15.4 EMX500 Titanium "Usotsuki"
DIY 64Ohm 15.4 Pink Dot unnamed
DIY 64Ohm 15.4 Titanium Composite Unnamed


Sources Inventory:
Apple USB-C Dongle
Fiio BTR3K
Fiio KA17
Qudelix 5k
Topping G5


And many more that I forgot or don't feel like including right now.