Big equipment updates for this thread:
-One 777D refunded
-One 777D damaged in transit awaiting refund
-One mostly-recapped 7700 (free to me *shrug*) sent to the tech after a kind AKer sent me a volume pot and case top off a destroyed 6600 for 50 bucks
-One totally recapped but non-working 777 from another kind AKer successfully fixed (blown L outputs), now also at the tech for new chassis-mounted caps (I didn't want to do the work, although it was WORK to convince the guy that I really do want the massive increase in capacitance like LeeStereo recommends)
-One pair of L1290/2s which initially had a problem with weak mids, and after
extensive trouble-shooting turned out to just need more solder at the spade terminals on the crossovers. Guy I bought it from let it go for $500 and threw in a Hafler DH-220 for another 150.
That brings us to today:
Drove two hours and bought a nice B&K EX 442 Sonata, 200 wpc, 75A, modded by Musical Concepts. Guy has a lot of hifi stuff and demo'd it on a pair of NS1000M speakers.
Gross, I thought. That same Yamaha brightness exists in their speakers too! Then it occurred to me to ask him to disconnect his preamp so I could pipe in audio from my phone directly to the B&K. I'd brought a 3.5mm>RCA with me. I promised I'd turn it all the way down and only raise it a smidge - I just couldn't walk away with this amp if it was responsible for the nauseatingly shiny treble-tastic sound I was hearing. Turned out to be his preamp. Within the first 30 seconds of my first sample track, I pulled out my wallet.

Soup cans!
Folks, I am now a believer in big power for the big ADS. High current mosfet is just what the doctor ordered! Brought that B&K home and set it up in parallel with the Hafler DH220, preamped with the 888. Now A/Bing the B&K and the Hafler on my newly-fixed 1290s! Incredible! <insert superlatives here>! Wide open sound, tons of detail. It's a little hard to do a real A/B even though they're on a switch, just because the B&K is slightly louder at the same volume. But it is also more detailed and/or slightly brighter. One of these power amps will go to the other room to help out the 717 with the 1590s. And the empty spot will be filled by the 777 or 7700.
Which means I am now
done. Cap coupled Sansui, non-cap-coupled Sansui, 2 pair of ADS floorstanders, Boston A200s when I want even more room-filling, and KLH23s for nice mids with massive bass. I have all I need. Even the garage system got an upgrade today - on the way home I found a pair of B&W 685s on facebook marketplace, messaged the guy that I was passing through, and he let them go for $130. The tweeters were pushed in but first thing I did when I got home was to disassemble and massage them out. The L400s they replaced just weren't enough and sounded muddy when they got loud. B&Ws have that rock sound, and probably are much brighter but tamed by the Sansui 4000.

Oh and it was pouring rain on the way, foggy on the way back, then cleared right up for a beautiful sunset. I also came across the tallest bridge in California, had to get out of the car and explore.
