1. About valve

What's the difference between the valves, hagmann, traditional rotary, rotax, thayer valve?

What is the best valve?

2. Model

I want to buy new tenor trombone in the coming year.

I am interested in Bach a47bo and edwards T396-A model.

But I have no definite information about two model.

Can you explain that two model's compariosn about tone responsibility..etc..?

3. Does the artisan bell in the Baha model definitely perform better than the existing model?

Kavin,

You aren't going to get definitive answers to your questions, because there aren't any. Every valve and every trombone plays different to us. So the best I can say is: Try as much as possible, keep an open mind and an open ear and choose wisely.

If you can, don't try the trombones alone, but take someone with you who's ears you trust.

Thank you for ur wisely answer.

I should be play the other trombone that has another valve. haha