I enjoy reading the projects below, but I don’t always agree to their opinions and reviews, so give them a visit and make your own mind.

Head-Fi.org is not in this list because I dislike the site owner and think most of the site is built to fuel the upgrade hype. Still, among the hype makers, there are some really nice enthusiasts.
(Updated in Set 2021)

Reviewers & enthusiasts

Hyp0xia29 – I enjoy reading Hyp0xia’s blog mostly because of his no bullshit approach about life and audio.
Read more on this interview.

Bert Reviews – This YouTube channel was recommended by Hyp0xia29, and it’s a hidden pearl everyone should watch. [Currently on hiatus, no idea when it will return]

World Bolding – Alex Rowe is a great headphone reviewer, he also writes about other stuff on his medium blog.
Read more on this interview.

The Naked Audiophile – The project of a dear audiophile friend of mine.

HIFI Sound Enthusiast – Jason’s blog, now I don’t always agree with him but I do love reading his blog.

The Contraptionist – B9Scrambler’s blog, worth a reading especially given the fact that he has a lot of great reviews under his belt.

Mind The Headphone – Leonardo Drummond’s is a Brazilian audiophile I respect and follow with close attention. Leo as we affectionately call him is THE reference for anything headphone related in Brazil and to an extent Portugal.

Ana[dia]log – This Italian gentleman is an analogue enthusiast, if you are in to tapes and vinyl you should visit his channel.
Read more on this interview.

Resources & professionals

NwAvGuy – The now legendary MIA mysterious creator of a the O2 Headphone Amp. His site is full of good technical information.

LINKWITZ LAB – The late Eng. Siegfried Linkwitz site is a must-visit place if you like Hi-Fi. (Mr. Siegfried left us on September 11, 2018 at the age of 82, may he rest in peace)

Tim Cose – WTF Amps – Tim makes tube amps, no I’m not a fan of tubes but his electronics knowledge is pretty amazing so I really recommend a visit to his site.

Theslowdiyer – Electronics blog I really enjoy.

Tangentsoft.net – One of the few trustworthy sites besides HeadWize where you can find instructions to build the cmoy amplifier and other cool stuff.

Pete Millett’s DIY Audio – Really amazing site with cool DIY projects.

Meier Audio – Dr. Jan Meier has been around for a long time now, his amplifiers are top-notch, and he does an enormous service to the headphone community.

Crinacle’s IEM list – The list you should always consult before spending lots of money on in-ears. A great resource for new and old enthusiasts.

HeadWize Memorial – A project made to safe-keep the legacy of Mr. Pow Chu Moy the creator of the Cmoy amplifier and the defacto grandfather of the headphone hobby as we know it today

Tyll Hertsens

Tyll Hertsens the reference for any headphone reviewer retired on May 2018 to drive a van called Putt, he is missed. 
Steve Guttenberg (Audiophiliac) gave us a little update when Tyll visited RMAF.
Tyll in 2019 could be found on nomadcentercamp.com and on youtube, note that both places are NOT related with headphones, so keep that in mind.