OK, I am losing track of what all I have bought that needs reviewing/writing.
So I thought I create a thread on them and give you all an opportunity to also opine as to which you want done next. Not that I will listen to you, but it might be a form of therapy for you! 
EDIT: due to overwhelming amount of gear coming and going, I am no longer maintaining this list.
EDIT: due to overwhelming amount of gear coming and going, I am no longer maintaining this list.
- ES100 bluetooth adapter
- Aune S6 DAC and headphone amplifier
- NuForce uDAC-3 DAC/Amp Combo (picked up on massdrop)
- SMSL AD18 80W2 Bluetooth 4.2 HIFI USB DSP Digital Decoding Power Amplifier
- FXAUDIO FX502SPRO TPA3250 Class D Digital Amplifier Hi-Fi Stereo Audio Power Amp
- BEHRINGER MICROPHONO PP400
- Aune X7s headphone amplifier
- Audioengine DA3
- Mark Levinson No 39 CD player/DAC
- JDS Labs OL Switcher
- SMSL M8A DAC
- Schiit Modi 2 Multibit
- Finish the series on REW for dummies.
- Ingerik Direct USB Powered PCM2704 MINI USB Sound Card DAC Decoder Board for PC Computer
- Monoprice 111567 Desktop Headphone Amplifier
- FiiO A3 Portable Headphone Amplifier (Black)
- Genuine National JDSLABS Objective2 Black Edition By NwAvGuy Headphone Amplifier JDS LABS (Made in USA)
- PROZOR Digital to Analog Converter 192kHz DAC Supports Volume control Digital Coaxial SPDIF Toslink to Analog Stereo L/R RCA 3.5mm Jack Audio Adapter for PS3 XBox HDDVD PS4 Home Cinema Systems AV Amps
- UGREEN USB External Stereo Sound Card Audio Adapter with 3.5mm Aux and 2RCA Converter for Speaker, Headphone and Microphone, Earphone, Headset, Plug and Play on Windows, Mac, Linux and PS4, 3ft Cable
- Sabaj Da3 Headphone Amplifier Mini Portable Amplifiers Audio Hi-Res High Resolution USB Amp&DAC Native DSD512 32bit/768kHz Dual DAC Grey Color
- GUSTARD U12 32Bit / 384KHz DSD XMOS USB Digital Audio Interface black
- Hifime Sabre 9018 USB DAC
- Pangea Audio AC 14SE MKII Signature Power Cable - 2 Meter
- Audioquest - Pearl - RJ/E Ethernet Cable - 1.5m
- Impact of vibration on equipment
- Raspberry Pi streamers
- SMSL X4 USB DAC Portable Digital OTC Headphone Amplifier (Red)
- FiiO K1 Portable Headphone Amplifier and USB DAC, Titanium
- Dayton Audio DTA-120 Class T Digital Mini Amplifier 60 WPC (Black)
- SainSonic FX Audio D802 2x80W 192KHz Digital Remote Power Amplifier with USB Cable (Black)
- BEHRINGER A500 amplifier
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