'solderdude' has designed numerous DIY amps, power supplies, and much more...all free to the DIY community. He's also the designer of garage1217 tube amps and power supplies. He runs a very informative site HERE with tons of DIY information, guides, tutorials, and a blog about amps and...

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I just received my Sharkk Bravo headphones from Indiegogo, today, and searched the forums for an impressions thread. I didn't find any and decided to start one.    These closed-back headphones are a hybrid of electrostatic and dynamic drivers with the electrostatic energizers built-in to the...

Sennheiser makes TOTL and Mid-Fi headphones. Having a few on hand, I thought it would be interesting to post some measurements taken during one testing session. Given numerous uncontrolled variables between different testing methods / kits, consider these graphs FWIW / YMMV ---> Compare these...

No luck searching the forums for an answer so I'm posting here. I could figure it out by the process of elimination but that would take a lot of extra work. I hope someone who knows will respond.   Which terminal is positive and which is negative?   Thanks  

Fostex T50RP Incremental Mods and Measurements (FIMM)   Table of Contents     1. Introduction   2. DIY Measurement Kit   3. No Solder Phantom Power Supply and Mic   4. Making Incremental Measurements   5. REW .mdat files, ARTA Setup Pictorial, and Videos stored at Google Drive and Docs...