opamps

I bought 4 of these brand new old stock LME49990 opamps from a reputable seller on DIYAudio. I planned to solder them onto SOIC-DIP adapters for my famous Audiokarma-sourced CNC Phono stage but got out of vinyl hobby altogether. Price is $50 shipped in cont. USA. These amps are very hard to...

I purchased this Fasizi Record Player MM Phono Pre-amplifier and what I got was this My wishes were to have a preamp powered by USB so that I didn't have to use a 12V mains adapter, and I didn't particularly want anything superfluous like a headphone output etc. Wasn't the cheapest as I was...

Hi all, I'm not an EE, I love audio and try to be as objective about it as possible. But not being an EE means one can fall for claims that ultimately one can find no evidence for and has just wasted time. Many years ago, I intended learning some audio because you know, there's a website called...