I still have an IRS Beta system that I bought new. It replaced a pair of RS2-Bs.
I've heard the IRSs a few times - very impressive! (And too tall to even fit in my apartment!
)
SOTA Cosmos (vacuum, Electronic Flywheel), SME V, Koetsu Rosewood Signature
Esoteric X-05 SACD player, Alesis ML-9600 mastering CD burner, Nakamichi 700 ZXE Cassette Deck!
Pass Labs XP-15 phono stage
Pass Labs XP-30 (with Revelation Audio Labs 'Passage' CryoSilver Reference DualConduit DB-25 umbilical cables) & Hovland HP-100 preamps
Edge G8+ laser-biased monoblocks & Classé M-700 monoblocks
Rockport Atria & Infinity IRS Beta Speakers
MIT Shotgun ICs & SCs
Shunyata Denali 6000T, Shunyata Alpha NR, Delta NR, Viper Ztron, Venom HC & Harmonic Technology PCs, Synergistic Research Blue & Black fuses, Hi-Fi Tuning fuses
Klaudio LP200 ultrasonic RCM