Every LOTUS trumpet is built on a MAW Valve Block, produced in Germany by J. - Meinlschmidt GmbH , led by Josef Patermann. From all of our playtesting, we’ve clearly found that this valve block performed the best. Most trumpets have the intonation tendency that the louder you play, the more the pitch drops. And when you play softer, the pitch goes up. On every LOTUS Trumpet you’ll find that the pitch stays truly consistent from pp to FF, giving you a very stable playing experience where you don’