Ok so I have 4 trumpets that I decided to test today. Eastman 301 Student Trumpet Made in China for Eastman. It is a rental my son started off playing flute but wanted to play trumpet. We did not have time to find him one online before band started this year so we are renting until the end of December.While the build quality and fit and finish appear to be as good as any American made trumpet I suspect the materials. First it is easy to play I am preety sure I could get a cow to hit a perfect G and C in a matter of minutes on it. It does not project very well though. It has great compression. THe valves are OK but it is brand new as well so what do you expect. When you strike the bell it sound dead and does not resonate more of a thumb and then nothing after that.So while it is a nice piece to look at with it's laq. brass and nickle and silver I suspect the brass is either low grade or thicker then tank armour. Oh Marshall's Music has the nerve to list this trumpet's purchase price at $925.LOL Oh I wanted to mention that after a month or two of use the valves look like my 1968 Reynolds Medalist valves in terms of wear. The Eastman Monel valves must be super thin. The next trumpet is a $50 Holton 602 from the 1970's to 1980'sthat I bought off Ebay. It is built like a tank and the build quality and fit and finish are top notch even though it is not fancy or anything. The valves where so filthy when I got it that their was a 1/4 of sludge on the bottom cap's. I had to scrub the valves with copper rifle bore cleaner and lighter fluid. It took 2 hours of scrubing to get that trumpet clean.In spite of this the valves still look like new and function great!! In fact they function better then the new eastman and feel better as well. The compression is identical to the new Eastman. It play's better thent he Eastman in terms of intonation,slotting and timber. When you strike the bell you get some resonateing but still nothing to write home to mom about. The next trumpet is a 1968 Reynolds Medalist made in Abiliene Texas. It too is built like a tank with heavy braceing and tubeing is Olds Ambasador thick like with Nickle Silver tuneing slide sections etc.....The tubeing on this model definately is more conical then the first two models.The trumpet's bell has a much more gradual flair then the first two models as well. This is my practice and beat around trumpet. If I am going to take a trumpet camping this is the one I take for myself etc....... When you strike the bell it is like you are strikeing a a cymball. You get a repeatable tone that resonates for a while and is very crisp and brite. I am sure that this resonateing feature combined with the increased amount of conical tubeing and much higher grade of materials is why this trumpet sounds so great for Jazz. It is darker and more mellow then most trumpets but not so extreme as to be confused for a Cornet. It has great projection. It slot's well etc....... I am getting a new to me blessing light weight artist model in Bb. I will test it and see how it does in terms of the resonateing versus, intonation,slotting,dark or bright, etc........ My theory is that the more like a tunning fork the bell of a trumpet is the more versitil it will be in being able to reproduce dark or bright timber's and the better it's projection for any give amount of air flow. If this holds true then strikeing the bell of a trumpet when out shopping for a new one might well give you an idea of what it will sound like before you even place it up to your lips. If this has already been covered then I appoligise. I am just now thinking of things that I never really gave any thought to when I was a younger man. This would though explain why ultra thin shaved down bell's seem to project better and sound brighter.... I think that over all the lighter you can make the trumpet outside of the lead pipe and valve caseing the more responsive it will be to what your lips are doing. So if you are trying to sound dark it will sound darker and if you are trying to sound bright it will sound brighter. So now the race to make the tubeing thinner and thinner. I am also woundering why with mandrel tube bending and shapeing machinery that is all CNC why we have not taken a close look at the conical versus cylindrical tubeing idea a bit more. Instead of haveing a fixed ratio of conical to cylindrical we should be looking at continiously conical tubeing. So what you would have would be continious progression for the entire 1.5 meters of tubeing that makes up a trumpet. In this way you would have less transitional air distrubances. Since the air colum is the heart of the sound and the tubeing is their to serve the air colum's needs why not take the trumpet into this era of technology. It could only improve the sound of the trumpet. Yamaha has already proven that machines can make a great trumpet and all the best things are usualy CNC manufactured from race engines to target rifles.... I have some idea's for improveing mouth pieces as well but they will not work with the current way they are manufactured since I am not useing a round hole through the shank. The shank can be round but what I want to do is use a "D" shaped thraot that is tapered the flat of the "D" would face down. The rest of the mouth piece would stay the same initialy while I worked out a few other idea's. This would give you more velocity to your air colum for the same amount of effort and volume as a round tapered throat. Ihave all kinds of little idea's like this to improve many instruments. THe problem is that most intruments and their part's are still made with 1800's technology. Really their has not been anything new happen to the trumpet in over a 100 year's. What do we have, reversed lead pipe, remove some braceing, add some braceing, different size leadpipe, changeable bell's nothing really has changed but their is a lot of techology and science that was not around 100 year's ago.