Most high-end audio products are built to voltage specific to the country’s incoming AC levels, like 220 volts or 120. Why don’t more HiFi products have universal voltages so they can just be plugged into the wall wherever they are being used and just work?

We have all heard the term resolution as it applies to audio and its reproduction. What does it actually mean? How is it achieved? Does everyone have it? Lots of question for Paul to answer on the fascinating subject.

MQA is one of the more controversial formats of recording and storing music ever to hit the high end audio world. Our customers want to know what it is, how it works, and what our opinions of its benefits or issues are.

Years ago there were kits everywhere. Heatkits, Dynakits, Eico kits. But now there seems to not be DIY projects and kits available anymore. Is this true and if so, why did they go out of popularity?

It’s often asked if a speaker’s impedance can be changed to better match the amplifier intended to drive it. Can this be done and, if it can, is it a good idea? What’;s involved and, for that matter, what is speaker impedance anyway?

What do all three of these iconic brands have in common? Jim McCullough. Jim is a pioneer in the audio industry, a man who helped elevate these brands from small-time companies to the prestigious heights they once achieved. Learn the stories of how the landmark high-end audio companies of Mark Levinson, Wadia, and Cello became as big and famous as they once were, and what happened to them in the end.

How much better is a dedicated CD transport than using a CD player’s digital output? It certainly would be a lot cheaper and more convenient to use a CD player for listening as well as sending digital to a DAC.

PS Audio is an American company so how do we test our products for use overseas in countries with 220 volts or higher? Do they sound the same when powered at these higher voltages and how does this all work so everything sounds the same in one country as in the next?

We always relate the term jitter to digital audio but what of the timing irregularities in vinyl like wow and flutter? And if we’re concerned about the one why not the other. While we’re on the subject which format has the best sound?

There are as many opinions on speakers and their implementation as there are stars in the sky. Do you get better sound from removing the bass from speakers before augmenting with a subwoofer or, should the subwoofer be used in addition to the bass already available on the speaker?