Full range loudspeakers aren’t as full range as most people believe and they benefit from the addition of a subwoofer. How is this done and how does one know when they are needed or not?

The double blind test where neither the subject nor the interviewer knows what’s being tested is assumed to be the gold standard in unbiased testing. Yet, there are problems with this method when evaluating sound quality.

Running separate ground and power lines for each piece of audio or video equipment is a smart way to run your system for best sound quality. But are there problems from ground loops and their hum?

Tweeters are said to be best when at the same vertical height as the listener’s ears. Is that true and if so why? This viewer disagrees with that assessment and grilles Paul.

With nearly 50 years of experience in the high-performance audio field this viewer wants to know Paul’s level of commitment and enjoyment of what he does for a living.

This viewer is plagued with unwanted sibilance in his system and he wonders about the cause of it. Can it come from the electronics, the source, the speakers, or all three?

We know live music from afar without seeing the musicians play, and we can almost always tell if the sound is reproduced, but why? What makes live music sound live and reproduced not?

Now that Class D amplifiers seem to be taking over even the high-performance area of musical amplification is the day of the linear amplifier over? What’s the future of linear amplification?

Lots of companies including PS Audio make state of the art D to A converters but what about the opposite? Is it difficult to build a truly remarkable A/D converter?

When playing two pure tones at the same time can that cause distortion? And, if so, what is it called and what can be done to remedy and eliminate that distortion?