Cary SLI-80HS modifications

@somebike Thanks for your input about the upgrades! That’s very reassuring. The SLI-100 sounds better is interesting.  Could it be your room acoustics or the speakers match it better?  Hmm…  I’ve only considered the SLI-80HS because I can only raise my current SLI-80 volume to about 10 0’clock position or it’s just too loud. Perhaps the KT150s sound better than the KT88s.  I really like the Gold Lion KT88 in my SLI-80. 

@pehare The SS rectifier sound comment is also very reassuring because that was my biggest concern in this purchase.  Thanks!  

Also, I have a theory regarding the rectifier tube reliability problem.  I think it’s due to changing listening mode (UL - Triode) while at power.  I always thought that had to be hard on the rectifier tubes so I never did it.  After 8 problem-free years I started changing the mode while at power for convenience. It only took about 3 or 4 mode changes at power until I blew a rectifier tube and a fuse.  This happened twice. I stopped doing the mode changes at power and the problem stopped.  The tube blows didn’t happen at the exact same time I made the mode change. The tubes blew within a week or so afterwards.  Maybe just a two-time coincidence but I stopped doing it and the amp has been problem-free for almost 2 years.

@txp1 I do have a big listening room that is kind to extra watts when desired.  I should point out that the SLI-100 also has the upgrades and the difference is subtle.  I could drive speakers of varying efficiency with plenty of volume.  I do not think you will be disappointed by the SLI-80.  I also recommend triode mode in pure class A.  In my opinion, that's shine best.

@somebike   I’ve owned a SLI-80 for almost 10 years so I do appreciate the sound of triode mode.  For many years I almost exclusively listened using triode mode.  But in the last year I’ve really learned to appreciate UL mode.  UL is more extended on both highs and lows. Bass is tighter. The soundstage is wider on UL but triode mode has a much deeper soundstage.  Triode mode is usually meatier between the speakers.  Also, I’ve read that people appreciate triode mode when listening to female vocalists. I’m no expert there but it makes sense. 

@txp1 I really like the Gold Lion KT88 in my SLI-80.

Tip: Trust your ears and what you like. A former contact and colleague designed the SLI-100 for Cary. He departed shortly after it was ready to go into production. While the circuit determines the sound with any tube, the KT88s sound very nice in the Cary amps. Sometimes, in some cases, newer is "not always better", fwiw.

This note is coming to you from someone who owns monbock amps that run KT150s or KT120s today. I spent way too much time on my current amps, input tubes, and caps along with different sources trying to get them to provide a sound, tone, texture, and result that sounded closer to my former Cary amps with KT88s, fwiw. While I’ve not heard heard the new SLI-100 in my system and setup, imo, if you love your KT88s now, my bet is the newer unit will sound different, a more modern and more linear sound. KT88s can sound really nice. The old days we use to bring the amps home and try them, not so easy any more with fewer dealers due to manufacturers now offering buy-direct. 

@decooney Excellent input, thanks!  I’m definitely with you on that.  It’s the new SLI-80HS or just keep my old one.  The old unit is sounding really nice these days.