MP3 files are lossy. This means they have lost information in an effort to reduce file size. Can we hear this loss? If we compare lossy files with lossless files, is there a difference?

Vacuum tubes are considered to sound “fatter”, “warmer” and generally “softer” than their solid state counterparts. Does that mean they sacrifice resolution for sound quality?

The late Arnie Nudell developed what he believed sonically killed his greatest creation, the Infinity IRSV and the Genesis 1. Did he do this? And if so, how do they work and will there ever be a commercial version available for sale?

The Infinity IRSV has 36 tweeters, 12 midrange drivers per channel. How are these many speaker drivers divided up? By frequency? Amplitude? Tasks? Paul gives us a quick tour of one of the greatest loudspeakers ever built and sold in the world.

So much of what we hear in audio cannot yet be measured. How then can engineers design circuitry around such unknowns and how do they know if they’ve succeeded or failed?

Headphone and loudspeaker amplifiers certainly seem like they should be the same but looking at them quickly dispels that notion. So, what is different between the two topologies?

With hundreds of videos, dozens of designs, multiple inventions to his credit, how does Paul McGowan get all his experience and information he shares with us?

There’s some great vintage audio equipment on the market still. What are the chances and opportunities to renew them with newer and better parts?

Clean power is said to be critical to the performance of high-end audio equipment, yet is that so? Power expert Paul McGowan gives us a slightly different viewpoint on the subject, one that’s going to be surprising to many.

What factors do we look for in the specifications of preamps and power amps to make sure we have the perfect match. Paul gives us a quick tour of the challenges and solutions to properly matching preamps to amplifiers.