Different kinds of product: one is active with its amplifier built in, the other passive and needs one. Judge them on how you want to own the system, not just the specs.
| Area | Better | Why |
|---|
| Bass | A | Fyne Audio Vintage Classic X digs deeper - 28Hz against 54Hz. |
| What you buy | depends | ATC SCM19A is a complete system - just add a source. Fyne Audio Vintage Classic X also needs an amplifier: more money and another box, but you choose it. |
| Connections | depends | With Fyne Audio Vintage Classic X that all comes from the amplifier you pair it with. |
| Upgrade path | depends | Fyne Audio Vintage Classic X can be re-amped later and outlive several amplifiers; ATC SCM19A ages as one unit. |
| Size | depends | ATC SCM19A is easier to place; Fyne Audio Vintage Classic X is bigger, which usually goes with fuller bass. Your room decides. |
| Cabinet | depends | Ported vs Sealed. Sealed is tighter and happier near a wall; ported digs lower but wants space behind it. |
| Price | evenly matched | Much the same money ($8,999 vs $8,999 a pair) - though the passive pair still needs an amplifier. |
A Fyne Audio Vintage Classic X B ATC SCM19A
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?
ATC SCM19A suits you if you want one box, ready to play, with nothing else to buy. Fyne Audio Vintage Classic X suits you if you already have an amplifier, want to choose the electronics, or expect to upgrade in stages. Neither is the better speaker in the abstract. If a subwoofer is in your plans, the bass gap largely stops mattering - you would be crossing over above 54Hz anyway, so judge these on the other rows instead. Match it to your room: we rate Fyne Audio Vintage Classic X the better fit for a mid-size room and a large room, and ATC SCM19A for near-field listening and a small room.
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.