You got it, Jaytor. That's a USB camera that belongs to the BACCH-SP stereo purifier. It tracks the head of the listener so that he/she gets the full benefit of the BACCH crosstalk cancellation filter, even if the person doesn't sit perfectly still.

If there's a clue, it's the JansZen speakers that you correctly identified. Edgar Choueiri, the BACCH-SPs designer, brings JansZen Valentinas to shows because their vertical dispersion is limited and he doesn't have to worry as much about sidewall reflections as he would with speakers having a more typical radiation pattern.

I wonder if the XA-60.8s are Pass's most popular current monoblocks. I love 'em, but they won't drive everything, even in a modest sized room like mine. The Tidal amplifiers are intimidated by nothing yet are as capable of as much nuance, refinement, and detail as many low-power tube amplifiers. Perhaps this is facile, but with the Ferios amplifiers, I feel that if I can't get a loudspeaker sounding good with them, there's either something wrong with the speaker or I made a bad judgement about the suitability of the speaker for my room. But it sure ain't the amp!

No, that's just a box with a piece of black fabric over it. Though I do know some high-end accessory manufacturers who will sell you one just like it, for $1199, that have an astounding impact on the sound...

Anyone else see the "mystery  component" I'm referring to?

I'll add a bit more information about what's in view but even that's changed since the photo was taken. That happens a lot. Mostly, I'm interested to know if anyone noticed one unusual "component" in the photo. Hmm?

As noted by another poster, there are two sets of amplifiers: there are Tidal Ferios monoblocks on top and Pass XA 60.8s below. Mostly, I listen with the Tidals, but use the Pass amps when I'm set up for multichannel. (There's another 60.8 for the center channel when there is one and, elsewhere in the room, a Pass  Alpha 0s for the surrounds. The cables in the photo are Transparent Ultra, both balanced interconnects and speak cables. They've since been changed to Siltech 880i (IC) and 880L (speaker).

So, can anyone identify the mystery "component" and guess its function? Hint: It's key to the full functionality of another product.