Meinlschmidt open flow valve

[Tomnormann]

What is your experience and opinion on the Meinlschmidt open flow valve, compared to other big rotor valves? Even if I find it very good, its still not amoung the producers first choice. Why is that? I see that Adams uses it and Bach have it on their 42BOF model, but nothing compared to the popularity of for example Hagmann.

[LIBrassCo]

It's an absolutely fantastic valve. Imho best rotor available.

[Burgerbob]

It's much newer than the hagmann, just hasn't had time to bevoke as popular.

[Gribnes]

it is the BAC rotor of choice for custom

[JoeAumann]

It's the best available rotary valve on new Bach trombones, for sure. I've experienced it on Adams trombones also. (Adams is also putting this valve on their new 5 valve, non-compensating euphoniums!) That said, I find it to be only above average. The pitch center seems high. I have to pull out the F crook on the 42BOF much farther than on any other Bach 42B of any description. The timbre seems a little constricted as well. The legato out of it is decent. Not too clicky or poppy sounding, in and out of the valve. And yet there are better rotors on the market in that regard, also.

[Burgerbob]

I have to pull out the F crook on the 42BOF much farther than on any other Bach 42B of any description.

This is the same F wrap as the Artisan A47BO, and it's quite short. That's due to an earlier design, nothing really with the valve itself.

[Tomnormann]

It's the best available rotary valve on new Bach trombones, for sure. I've experienced it on Adams trombones also. (Adams is also putting this valve on their new 5 valve, non-compensating euphoniums!) That said, I find it to be only above average. The pitch center seems high. I have to pull out the F crook on the 42BOF much farther than on any other Bach 42B of any description. The timbre seems a little constricted as well. The legato out of it is decent. Not too clicky or poppy sounding, in and out of the valve. And yet there are better rotors on the market in that regard, also.

Thank you for your comments. Regarding the pitch and pulling of the F crook, thats due to the quite short F tubes on the 42BOF, as Aiden comments above. The design is from the 47BO (which uses a small rotor I believe) you will have to pull it the same. I don’t pull it too much on my LT42BOFG though, because then the low F is too low, better to adjust the C. Anyway, thats not due to the valve itself. You find it better for Bach than the Hagmann, btw?

[Tomnormann]

it is the BAC rotor of choice for custom

I didn't know that. That is interesting information.

[JoeAumann]

It's the best available rotary valve on new Bach trombones, for sure. I've experienced it on Adams trombones also. (Adams is also putting this valve on their new 5 valve, non-compensating euphoniums!) That said, I find it to be only above average. The pitch center seems high. I have to pull out the F crook on the 42BOF much farther than on any other Bach 42B of any description. The timbre seems a little constricted as well. The legato out of it is decent. Not too clicky or poppy sounding, in and out of the valve. And yet there are better rotors on the market in that regard, also.

You find it better for Bach than the Hagmann, btw?

I have little experience with the Hagmann valve, only ever play testing it on Bach and Adams trombones. It really is "apples to oranges" of a comparison, but no, I don't find the Meinlschmidt to be better for Bach than the Hagmann.