What is your favorite type of tweeter?

Hard to beat the Esotar2 tweeter in my Dynaudio Contour 5.4's.
Dan

Domes are extremely good. They are perhaps the best shape for a driver and give the most even dispersion. Small 1 inch domes are very cheap when used as a tweeter (hence extremely popular) and sound great. The likley reason they are not used on most larger drivers is the cost of a huge magnet for such a massive voice coil and the challenge (extreme tolerances) required to control the rocking motion. Rocking motion is worse for drivers with large excursions and large voice coils creating a costly engineering challenge to maintain precise linear excursion within the gap. A large woofer with a tiny voice 1 or 2 inch coil that is aligned by a spider and rubber surround is easy and very cheap to make (and also, funnily enough, what you find in 98% of speakers)

This same phenomenon is known in hydraulic engineering - a piston height should be as long as its diameter in order to prevent binding from rocking motion. A small voice coil is akin to a small diameter pistion and can be controlled more precisely with less precision/cost.

My favorite tweeters are the Gallo CDT, the Digital Phase Titanium Dome and the various kapton ribbon tweeters out there.

I really like soft domes and try to stay well away from any "metal" dome tweeters, however with that said, the best tweeters I have listened to are the ribbon tweeters of the Verity Audio Sarastro and Lohengrin! There are others that are good too, such as the Dalis and some really bad such as the Legacy Focus HD.

Remember, the above is IMO!!

Thanks folks, John

I have always had a soft spot for the Heil tweeter. It hasn't made its way into many commercial designs, I suspect because it's very hard to make a crossover to match it well to a cone woofer. The Oskar speakers are exceptional for their highs IMHO.