Harbeth 7es2 vs Harbeth 7es3

Somebody's fibbing somewhere.....

the 7-2's and 7-3's are somewhat close in overall sound, but the 7-3's have tighter, deeper bass, overall clarity is way up, more detail. If you can find a nicely priced 7-2, not one that has been messed with, you'll be very happy.
I can't imagine the said speaker working properly, different crossover, etc.....I'd pass if I were you.
Good luck!

Personally I would pass on a speaker that has been modified, especially by third parties. Similarly like Chashas1, I would pick an original C7ES2 over a modified speaker. You wouldn't know the quality of workmanship of the modified speaker and the true performance of the originally designed speaker.

Good luck.

I own a pair of C7ES2 and have the upgrade itch. It may just be cabin fever. I was wondering what I would gain by upgrading to the C7ES3.

a much tighter, seemingly lower bass, for one.
also an increase in clarity.
definitely noticeable.

I've heard both. I favor the 7-ES2. Even though they are older, I feel the sound is more accurate, with zero listening fatigue and midrange to die for. The 7-ES3 is great too, but perhaps is adding some coloration in the lower frequencies. Both generations are examples of how fine, monitor-style loudspeakers should be engineered. If you have superior recordings in your collection of music, you will want to listen all day long.