Sorry for the delay, but my dinner turned in to a spontaneous trip to Hawk Cay in the Florida Keys with my dinner mates. Hawk Cay is beautiful and dynamic just like the Coincident Dynamo 34se.
The Dynamo is located in my 14x16 home office, so all my top-notch gear is located in the living room and bedroom. As such, beside the Dynamo I've gathered together a bunch of my older cables, interconnects, DAC, transport, and so forth. I mentioned them earlier in this thread. My speakers here are the same Tekton M-Lore Tim Smith used in his outstanding 6 Moons review. Please read Tim's review. It says everything about this amp better than I ever could, it mirrors my experience almost exactly after I changed some tubes. Remember, I bought this model used for eight hundred bucks and I decided I'd spend the $500 dollar difference of its retail price on tube or other upgrades. My used unit came with Gold Lion KT77s with about 200 hours on them and a highly recommended NOS Phillips 5R4GYS which should be compatible with this amp but not recommended by Israel Blume, plus the standard Shuguang Electron EL34 as well as a pair of Shuguang 6SL7.
How did it sound? I thought it sounded very good but knew I could improve it. My wife thought there was something off, she didn't like the bass. I told her not to worry I was calling Brent Jesse and ordering a Mullard 5AR4 rectifier plus installing a matched pair of Sylvania 6SL7WGT 229 that I had in my tube stash. For now the Shuguang EL34s were staying in the unit as I wanted to get a feel for them with the new rectifier and 6SL7s. Once installed in the amp these tubes elevated everything, there was a huge transformation for the better. To borrow from Tim Smith, "purity of tone, the sense if space, PRaT, the inner detail, the fatique-free musicality, the druggingly delicious sweetness that single-ended tube amps provide, life-like vocals, a realistic guitar pluck, the long decay of a single piano key, a realistic double bass arco or banjo hammer-on in our listening room." Yes, the Dynamo does all those things and more. It is stunning, truly amazing.
I am going to purchase NOS RFT Siemens EL34s as well as Black Treasure 6CA7s, the NOS RCA Red Base 5691s for sure, perhaps later different cables, etc. This amp is worth it, it deserves the best; or, leave it stock. It is killer good. A no brainier. It is the best bargain I ever heard. Israel Blume deserves high praise. I could live with this amp forever. It does so much right. Read Tim's review. The best bargain SET to these ears, for once my wife agrees. Perhaps the best bargain in all of audio.