I just cannot help myself

[sailor]

I had a pair of AMT Heil Air Transformers' (Large) on the shelf for years. These were brand new, never hooked up until......

 

[sailor]

I just had to try this
I now can time align the tweeter.
I was always bothered by the fact the Razz tweeter is so far in front of everything else.
I was lucky I just had to remove the Razz tweeter pad to get levels right.
I am liking this very much

[mark]

So, you're using the AMT Heil Air Transformers to substitute for the Razz horn tweeters, right?

Are you using the original Razz crossovers, or?

I know what you mean about the difficulty in time aligning horns -- assuming the sound originates at the horn diaphragm you end up having to put the tweeter horn way behind the midrange, such that you're probably going to have tweeter frequencies bouncing of the top of the midrange unit which can't be good.

[sailor]

Yes Razz tweeter is not active.
using the Razz xover, sans the padding resistors.

[speakertom]

I have a lot of experience with the AMT1 mating it to various dynamic driver configurations. Let me know if you want to talk.

Tom

[sailor]

Thanks
so far it is working quite well using the Razz xover without the tweeter pad.
I will run a graph tomorrow 
the Razz mid range goes high 6kHz
both mid and tweeter xover are sharp cut off filters
i know the AMT can go quite low for a tweeter but I do not want to get too far from the Razz sound which is mostly the mid horn

[Chris]

Cheapaudioman on Youtube had a recent video on Super Tweeters.