Siblings in Revel's Performa4 series, so they share a family sound. It comes down to size, output and price.
| Area | Better | Why |
|---|
| Bass | A | Revel Performa4 F345 digs deeper - 36Hz against 43Hz. A subwoofer would even that out. |
| Amplifier needs | evenly matched | Similar sensitivity (87dB vs 86dB) - both want much the same power. |
| Size | depends | Revel Performa4 M146 is easier to place; Revel Performa4 F345 is bigger, which usually goes with fuller bass. Your room decides. |
| Type | depends | A Passive Floor-standing against a Passive Bookshelf - a different job rather than a better one. |
| Expandability | A | Revel Performa4 F345: bi-amping. |
A Revel Performa4 F345 B Revel Performa4 M146
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?
Revel Performa4 F345 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 43Hz anyway, so judge these on the other rows instead. In a large or open-plan room, Revel Performa4 F345 has the cabinet volume to fill it more easily; in a small room, near a wall or at desk distance, Revel Performa4 M146 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.