Good results with tweeter re-doping

Bought some vintage (1985-88) KEF C40’s from FB Marketplace. About $125.

Lacking quite a bit of top end. Noted that tweeters (Tonegen soft dome) had doping that had mostly crumbled away.

A bit odd that KEF outsourced the tweeter for this line!

Researched issue online. Found that NOS eBay tweeters also show same issue.

Found some info on shellac re-doping.

A bit tricky to clean and then apply shellac in three layers (waiting 1/2 hr between applications)

And this worked very well. Pretty much night and day.

I prev. DIY’d two b110s and a t27 (with orig KEF xover kit stuffed  pcb) into a vintage garage sale EPI cabinet with good acoustic suspension results. So I am familiar with the KEF “house” sound.

The c40s do carry that tradition.