Siblings in Revel's Performa4 series, so they share a family sound. It comes down to size, output and price.
| Area | Better | Why |
|---|
| Bass | B | Revel Performa4 F345 digs deeper - 36Hz against 43Hz. A subwoofer would even that out. |
| Amplifier needs | evenly matched | Similar sensitivity (86dB vs 87dB) - 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 Bookshelf against a Passive Floor-standing - a different job rather than a better one. |
| Expandability | B | Revel Performa4 F345: bi-amping. |
| Price | A | Revel Performa4 M146 is cheaper - $2,999 against $4,998, about 40% less; arguably a different class. |
A Revel Performa4 M146 B Revel Performa4 F345
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?
The usual trade-off: Revel Performa4 F345 measures better, Revel Performa4 M146 costs about about 67% more% less. Whether that gap is worth the money is the call only you can make - and in a normal room it is often smaller than the numbers suggest. If a subwoofer is in your plans, the bass gap largely stops mattering - you would be crossing over above 43Hz anyway, which makes the cheaper Revel Performa4 M146 much easier to justify. 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.