Clone 933 is available from AliExpress. The price has increased significantly (+ 40%). It exists with different cases. The sound is excellent for the price with a nice sound imaging and good ability to work with large diameter speakers. It goes very low in the bass, and that's why it's well suited to running a sub.
Aliexpress
Today, I no longer use this amplifier on my system, the quality level has been increased on the horn and the sub. I use a 2W amplifier for the horn with a Russian Yo-186 tube. The bass is reproduced with an Ampzilla 2000. The sound is more natural and more dynamic, but I have less sub-bass. It also causes less resonance in the room, but the price is more than ten times higher.
Aliexpress
Today, I no longer use this amplifier on my system, the quality level has been increased on the horn and the sub. I use a 2W amplifier for the horn with a Russian Yo-186 tube. The bass is reproduced with an Ampzilla 2000. The sound is more natural and more dynamic, but I have less sub-bass. It also causes less resonance in the room, but the price is more than ten times higher.