SpeakerTalk

[vistisen]

I have just got my tweeters back from the US where they were sent to be refilled with fluid ( the speakers have been in my possession for over 10 years and I don't think they've been looked at since new). What a revelation!
Suddenly vocals have a natural sibilance. I can hear the zing of a slightly loose guitar string against a metal fret. If anyone has Kef's with T33's that you know have not been treated recently, then don't wait, do it $100 upgrade that will astound you. Suddenly the musicians are in the room again, it all sounds so natural

[SaSi]

What was the timbre of the highs before treating the tweeters? Were they dull, too bright, sibilant or muddy?

[vistisen]

There were two main problems, one is that especially on some modern recordings the treble was very harsh. It spat at you, that seems to be a lot more under control. The other main thing I now realize was missing was the natural 'punctuation' of sound that I did not think had any treble frequencies, but now know they do. I was listening last night to Alison Krauss. The acoustic bass sting plucking actually contains a lot of treble information, and while before I loved my Kef for the weight of the bass, I now hear the instrument in the room. with all its interactions with the air around it. Its difficult to explain. So I guess the answer is that it the subtle treble sounds that were muddy before that are now revealed without it going over the top.

I should add that I use a DEQX PDC2.6 instead of a Kube and that does a good and very precise job of equalizing both the frequencies and the phase of the speakers (and the room) I do not know if the harsh treble I experienced before is all the fault of the source material or the result of the DEQX being too linear,, but it is much less harsh now.

[SaSi]

Thanks for the feedback. I'm asking because I don't know the condition of the T33s in mine. They sounded too bright in an empty reflective room (workshop) but sound pretty nice in the furnished listening room.

I still, though, find some recordings where the highs are a bit pronounced. Like needing a -3dB roll off. OTOH, with some very good recordings (Jazz and classical) the highs come out fine unequalized.

The heads were not used and stored for years face up in a basement storage room with ambient conditions varying from damp warm to cold. Wonder if that may have caused the ferrofluid to evaporate.

[exkefman]