It is typical to use the headphone jack on the equipment or purchase a separate headphone amplifier, but what about driving high-quality headphones directly from the preamplifier out?

At one time sonic holography was all the rage but now you hear nothing much about it. How does Bob Carver’s Sonic Hologram generator work, what did it do, and how did it do it? Paul also shares his own patented invention, the Spatial Projector.

If two woofers share the same box should they be in phase or push-pull and out of phase for best performance? This great DIY question prompts Paul to show off the new PS Audio speaker reference model from Arnie Nudell.

Winner of this week’s Snake and Chicken award, this classic question comes alive once more as Paul adds another twist to the problem of measurements on equipment vs. how our ears measure sound quality. If you want to know what’s really happening this is a good one to watch.

Does sound quality vary between ripping digital audio data from a CD or copying it from a streaming service? Our questioner wants to know because he’s concerned about the increasing number of errors on his discs.

CDs are read by lasers and their optical outputs seem like they should be connected directly to the DAC via the optical cable. Is that true? And, if not, how does it work?

If you want to use a single preamplifier to feed two separate power amplifiers, how do you properly split the preamp’s output signal without losing any quality?

Tweaks, vibration damping, resonant dots, all manner of audiophile madness pervade our industry. When voicing PS Audio’s new designs, how much attention do the engineers pay to such high-end tweaks?

Servo woofers are rare these days and this questioner wants to know how they work, why more companies don’t use them, and if PS Audio would consider bringing them back to high-performance audio.

Can high-performance audio make a difference in a system that is not as highly resolving at PS Audio ‘s Infinity IRSV loudspeakers? Paul suggests we can and goes into some depth on why and what levels we can expect.