Things that “blow your mind”

On my Channel:

DS Audio - 1st Impression

DS Audio DS003 Phono Preamp

You can build it with $40 in parts (my op amp version). For power supply, you can go crazy like I did. But a simple ifi wall wart (or any Wal Wart with a few Amps of current output) will do. It has to be clean. I learned the hard way. 

The schematic is here:

DS Audio Schematic

@rajugsw thanks for the links. Enjoyed the rant! 😂😂🤣

Recordings engineered by Rudy Van Gelder!

@mahgister AKG Headphones

l still use AKG 240 headphones in a system l set up at my girlfriends place. The 240 MK II is still in production.

The brand was then a division of Philips when l bought them. I had over the years noticed AKG in use in many recording studios, often worn by musicians and conductors. Last night l was viewing a documentary of Jerry Goldsmith recording the score for “The River Wild” film, some 30 years ago. He was wearing AKG semi-open studio 240’s with the “gold” (no relation) ear pieces.

l know they are probably not used today, but a good indication they were highly regarded in the recording business at that time. AKG are excellent at isolating outside noise, and comfortable to wear for long periods monitoring loud music. Great for conducting a large orchestra and hearing the stereo mix, but not so good if sitting at home, and the door bell rings.

The force in pounds per square inch of phonograph stylus contacting a record is more force per psi than the contact area of the tires against the road of a fully-loaded 18 wheeler. 

True?  Not true?