A generation apart: Fluance Ai61 is the newer design, against a 2017 model. Newer is not automatically better, but the older one is more likely to be discounted or near run-out.
| Area | Better | Why |
|---|
| Bass | A | Fluance Ai61 digs deeper - 32Hz against 60Hz. |
| Built-in power | A | Fluance Ai61 has the bigger amplifier (120W vs 70W RMS). |
| Connections | B | Kanto YU4 adds phono. |
| Size | depends | Kanto YU4 is easier to place; Fluance Ai61 is bigger, which usually goes with fuller bass. Your room decides. |
| Expandability | depends | Fluance Ai61: a sub output; Kanto YU4: a sub output. |
| Price | A | Fluance Ai61 is cheaper - $299 against $450, about 34% less. |
A Fluance Ai61 B Kanto YU4
depends neither is better in the abstract - it turns on your room, your system or how you will use them. Only specs published for both speakers are judged; anything missing on either side is left out rather than guessed.
Which should you choose?
Fluance Ai61 has the edge on paper, though the margin is not large. The rows marked "depends" may matter more to you than the score does. If a subwoofer is in your plans, the bass gap largely stops mattering - you would be crossing over above 60Hz anyway, so judge these on the other rows instead. In a large or open-plan room, Fluance Ai61 has the cabinet volume to fill it more easily; in a small room, near a wall or at desk distance, Kanto YU4 is the easier speaker to get right.
And remember what a spec sheet cannot show: how each looks in your room and whether the finish suits it, what dealer support and warranty are like where you live, and how they actually sound to you. If you can hear them first - ideally with your own music - that will tell you more than any number above.