Infinity History.

Paul McGowan would be your best bet and has/had his up for sale as it doesn’t compare to his top model:

https://youtu.be/SQCDDGKi9pQ?si=DC_8NRou52DaOu-Z

mgattmch

It would be very good to hear from anyone who has heard the IRS loudspeaker system, is this one of, if not the best, loudspeaker system ever made?

I heard the big Infinity IRS at Lyric audio in Manhattan. I think it was the Series III and it sounded fantastic with ARC electronics, even though the room was undersized for the speakers. I was using Infinity 2.5s at the time and was already hooked on Infinity. The path eventually led me to buy an IRS Beta system, which I use to this day. The IRS series were fantastic speakers in their day and remain so, although they need some maintenance over time.

Interesting. In the mid-1990's I purchased the Infinity Composition Home Theater package, left and right mains with integral powered woofers (the Prelude Full Range, or P-FR), a center-channel speaker (the Prelude Center Channel, or P-CC,   and a pair of surrounds, the Prelude Quadrapole Surrounds, or P-QPS. I keep waiting for the surrounds to fail but they don't seem to have degraded at all. I have speakers ready to put in their place but haven't bothered since they are still working flawlessly in my basement theater. The dark and cool environment and light use might be why they have held up so long.

The Preludes show up a number of times in the linked video but are not actually mentioned.

Infinity?

This could go on forever...