This is an index of (nearly) all forums posted here. I'll try to index them as soon as they are posted but it may still take a while. Activity number is counted by hand and updated upon request because there are too many forum backends which prevents automating this. Please point out any mistakes in the comments. It may take a while for changes to federate
Analog Tech
- Tapeheads.net tape • gear • music • people... Analog is real! Activity: 30 threads/day
- VideoHelp This site will help you to make your own DVD, Blu-ray, AVI, MKV, MP4 that can be played on your mobile, standalone DVD player, Blu-ray player, media center or portable device from any video sources like online video, DVD, AVCHD, VHS, DV or downloaded movies like MKV, MP4, WMV, AVI. Activity: 27 threads/day
Linux
- Linux Mint Forums Activity: 166 threads/day
- Arch Linux BBS Official Arch Linux support forum Activity: 70 threads/day
- linuxquestions.org Old forum. Still very active, you'll get answers. Also has a UNIX section Activity: N/A
- linux.org Activity: 25 threads/day
Hi-Fi
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Steve Hoffman Music Forums Music, audio, tubes, hi-fi, stereo, vinyl, CDs, hi-res, SACDs, video, and the mastering of Steve Hoffman! Activity: 350 threads/day
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AVS Forum A forum community dedicated to home theater owners and enthusiasts. Come join the discussion about home audio/video, TVs, projectors, screens, receivers, speakers, projects, DIY’s, product reviews, accessories, classifieds, and more! Activity: 80 threads/day
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Audio Science Review (ASR) Audio, Audio, Audio! This is the forum where we try to impress each other with how much we know about audio. Heavy use of technical jargon is required for participation. Activity: 125 threads/day
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Audiogon Forum The place where audiophiles talk. Ask a question; get advice. Or just speak your mind. Activity: 10 threads/day
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Audioholics "Let our rigorous testing and reviews be your guidelines to A/V equipment – not marketing slogans" Activity: 10 threads/day
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DIYAudio Get answers and advice for everyone wanting to learn the art of audio. Activity: 180 threads/day
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AudioKarma Activity: 160 threads/day
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Audioasylum The Audio Asylum is a free, independent resource made available to you by a small volunteer group of audio lunatics. This venture is user supported. Activity: 45 threads/day
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Head-Fi Activity: threads/day
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Roon Forum Activity: threads/day