Celestion Ditton 66’s. ‘Upgrade’ to modern speakers consequences?

I can remember the Dittons sounding balanced, engaging and doing some things pretty well like bass, depth, with natural mids and highs. Excellent for atmosphere and slow music but less when things got too busy. If you like that presentation but your music preferences are varied check for modern speakers with more transparency and better separation.

I would look at upgrading your preamp to something like a Supratek.Your speakers and power amp are very good.A good modern tube preamp will really open the sound up and give a more 3D sound.That has been my experience with good vintage three ways like Gale 401s and Celestion Ditton 551s.

I have Ditton 66 speakers and they are a prime example of how a speaker, compared to changing technology, remains fndamental and does not change a lot over time.  Many have tried to replicate the Celestion Ditton 66 Studio Monitors, but they have a unique sound all their own.

I drive mine with a McIntosh C48 preamp and a McIntosh MC500 power amp (2 x 500 watts).  I didn't plan for this combo, it just fell into place and there is not one part of it I would change.

I had Celestion Ditton 15s before and prior to that, all PSB and Paradigm speakers.  I am a strong believer that the old gear, before it was made offshore like most speakers are today, sound better.  I would rather spend less money on something older and better sounding then pay the jacked up prices and buy something lesser at todays prices (produced offshore and assmbled locally).

Even better for you that you got them recapped.  I bought all new caps out of France and plan to tackle that myself some day.  Just as a matter of interest, I added an SVS SM-2000 Pro subwoofer to my system which compliments the Ditton 66 around 40 Hz

A pic of the crossover and inside of cabinet would be helpful here.  If they are updated properly and the drivers are in good condition, stay with them.  I have a set of modern "towers" from a well known company.  They retail for two thousand some a pair and are rated/reviewed as a great buy for the price.  And of course their description on the website describe them as using top notch quality parts.  Not so.  Piano gloss finish and all but once I looked inside I was very disappointed.

The electronics are basic, made overseas(not always a bad thing.)  Cost cutting by the speaker company for sure.  Only one small poly cap for the tweeter circuit and small steel core inductors.  Binding post is junk.  Not enough dampening of the cabinet.  The drivers seem OK though.

I revamped the crossovers with Clarity Caps and audio grade(?) electrolytic caps where needed.  The tweeter/mid circuit inductors are now good air core ribbon style.  Installed quality binding posts and added more internal dampening.

The result is worth the $$$ and time spent.  Now, they not only look real pretty😉 but sound much better(at least to me).  

You’ll need to spend in excess of $10K to equal the Ditton 66 in terms of full range power response. Focal Kanta 3 would be one to check out. Expect greater resolution and more articulate bass with lower coloration overall. If this is way out of the budget, sit tight and enjoy. Maybe try new speaker cables.