I don't know what clone version it is, but here is the link to the ad I initially responded to:
https://www.usaudiomart.com/details/649782488-single-ended-45-dht-triode-amplifier/?utm_campaign=response-received&utm_source=notification&utm_medium=emailHowever, I wound up having a new amp built and Oliver upgraded some parts. Quoting Oliver... "The parts I treated you a little, resistors are really nice sounding AMTRANS carbon film, coupling capacitors are copper foil/paper in oil types, bypass for the 45 cathode is a large PP film type."
I think for the price point, build quality, and part quality, and just the fact that it is handbuilt to order makes it a special amp if your speakers are willing to sound good with 1.5 watts. Luckily the Nenuphar Mini's are. I used the amp with a Sachs tube preamp and an Audio GD HE XLR tube preamp, which is still currently in the system. Both sound great.
I need to hook this amp back up since I haven't listened to it in a few months. I kinda went amp crazy. The Nenuphar Mini's are unique to me because they can work with low pwered amps like this and they're revealing so that I can pick up differences in sound from any system changes more than any speaker I've had before. So, I've been playing with a lot of amps. I currently have this 45 amp, a Line Magnetic LM518 (I bypass the preamp section), Primaluna EVO300 amp, LSA Voyager 350 GanFET amp (haven't really used much yet and is really for a different system), and I am actually today picking up a pair of Valvet A4-CB monoblocks. I've also used a Canary M90, Mastersound EL34 amp, Tektron EL84 amp, Sophia Electric 91-01 monos, Odyssey Kismet, and possibly a couple others I'm not thinking of. Looking at this list I think I have a problem! My favorite right now is the Line Magnetic, but the 45 amp is one of favorites because the sound is unique. The bass is very deep, maybe a touch thick, but has this bouncy elasticity to it that makes listening to jazz a lot of fun. I'll likely pair down to 2 amps but I think I'll always keep the 45 amp because I love the uniqueness of it, its relatively inexpensive so wouldn't yield me that much if I sold it, and it sounds great. I also did briefly have the an Alan Eaton 45. That also sounded great. But I sold that when I got the Oliver Sayes one. The build quality and parts are very similar and they sounded very similar. It really just came down to me preferring that Oliver built this amp for me and I love the wood casing. Otherwise I also recommend the Alan Eaton amps.
The amps I still really want to try are the First Watt amps. I keep seeing SIT-3's and one day I will try one, but I love tube amps and have my hands full right now. Excited to hear the Valvets because on paper they seem like a great match for the Cubes. We'll see (or hear).