To a purist they would be less valuable , at the same time a buyer wanting an updated pair they would be a no wait bargain.
I have a pair of 1987 La Scala's, a garage find that were in very rough shape. Two different tweeters, one woofer torn and gouges and scratches all over.
I made several "modifications" new crossovers, and new drivers all from Crites, and added 1/2 inch MDF to all outside surfaces, with new veneer.
So big question did it make a difference Yes, is that difference better I believe so.
The difference is that the original 1987 La Scala's were true PA Speakers and had a very enjoyable "Live Sound". If Live sounding speakers were the goal, I would not have changed anything.
My goal, in my words, was to refine the sound from PA Speakers to upgraded HIFI speakers. Look at the difference between a 1978 La Scala and the latest est La Scala's
The new ones have a 1 inch MDF cabinet, the squaker and tweeter are now in seperate cabinet and they have a new crossover and are critically acclaimed.
I am no speaker designer, no electrical engineer and have no previous speaker modification experience. I am an enthusiast and have enjoyed the process and the results. Everyone that comes over says WOW your system sounds outstanding. Great center stage with depth and it fills my listening room with sound.
Would I do it again yes, I would probably also separate the squaker and tweeter, why I think it enhances your ability to adjust your system to your room which is a critical factor with any speaker.
So If you want to Modify/update your speakers go for it, if you are concerned about resale value then refresh your speaker exterior surface and enjoy your speakers. it is all about hearing the music you enjoy the experience.
