HiVi RT1C-A Planar Isodynamic Tweeter

This is by far one of the best value tweeters you can buy! I love everything about them but they are made by HI-VI the makers of the Swan speakers. Ok I was reading where in another review that his tweeters were not as "loud" as they should be. Well it depends on the crossover frequency and type of crossover you are using whether 6,12,18,or 24. I contacted HI-VI and learned that these tweeters are marked (neg,pos) out of phase due to the fact that they recommend a 12db crossover which will put your signal 180 degrees out of phase so to correct phase issues they were marked out of phase which makes sense but a master speaker builder such as myself would appropriately change phase depending on my crossover im using. Anyway very thoughtful but could have stated it in the manual. So if these dont sound right try them out of phase. These are a great find and dont be afraid to play around with the wiring you wont hurt anything!

I am stunned that a tweeter at this price is able to deliver such high performance. Very smooth and extended response, especially for a tweeter. Best of all, impedance is virtually resistive.

Tried a pair of these crossed at 3500hz in small 2-way speakers. I really enjoy the sound of these tweeters. Clean and effortless sound. My only complaint is one had a resistance almost 1 ohm higher than the other, about a 20% difference. Since I am somewhat new to speaker building, maybe this is not uncommon, but I think it suggest quality control issues in manufacture. That is my only gripe, I will definitely use these again, I like them better than other tweeters I have used.