These sit in different price classes - Fyne Audio F502S costs roughly 3.5x what KLH Concord does. Expect it to lead on paper; the question is whether the gap is audible enough in your room to be worth it.
| Area | Better | Why |
|---|
| Bass |
evenly matched |
Much the same reach (30Hz vs 28Hz). |
| Amplifier needs |
B |
KLH Concord is more sensitive (94dB vs 91dB), so it goes louder on the same amplifier. |
| Size |
depends |
KLH Concord is easier to place; Fyne Audio F502S is bigger, which usually goes with fuller bass. Your room decides. |
| Price |
B |
KLH Concord is cheaper - $1,000 against $3,499, about 71% less; arguably a different class. |
A Fyne Audio F502S
B KLH Concord
depends neither is better in the abstract - it turns on your room, placement 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?
KLH Concord has the edge on paper, though the margin is not large. The rows marked "depends" may matter more to you than the score does. In a large or open-plan room, Fyne Audio F502S has the cabinet volume to fill it more easily; in a small room, near a wall or at desk distance, KLH Concord is the easier speaker to get right. If your amplifier is modest, vintage or valve-based, KLH Concord is the safer partner - the other will want more current or more watts to sound its best.
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.