Yamaha YBB-103 vs 621

Chadtuba · Post by **Chadtuba** » Thu Jun 04, 2015 1:04 am

What are the differences between the two aside from the 4th valve and the student versus professional labels? I've got a great lead on a 621 that I've played numerous times before. I'll probably follow through with the deal but it got me thinking about the differences between the two horns. Thanks for your input.

cctubaneeds · Post by **cctubaneeds** » Thu Jun 04, 2015 1:23 am

i have access to four 103, and I have played three 621 and own a 621. The 621 is far superior. The valve layout is different. If find the 621 more free blowing and a bit fuller. I prefer the cc versions but my BBb is great. Only complaint is that spit really collects in the 2nd valve on the 621.

Jose the tuba player · Thu Jun 04, 2015 1:25 am

unless i am mistaken the bore size of the 103 is smaller.

Three Valves · Post by **Three Valves** » Fri Jun 05, 2015 11:49 am

Oh what??

We have to be sensitive to the model 103's self esteem??

Tubajug · Post by **Tubajug** » Fri Jun 05, 2015 12:11 pm

You could see if Dan Schultz would sell you the four-valve version of the 103 he built himself:

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Dan Schultz · Post by **Dan Schultz** » Fri Jun 05, 2015 2:36 pm

Jose the tuba player wrote:unless i am mistaken the bore size of the 103 is smaller.

I don't know about the other Yamaha tubas in question but the bore size of the YBB-103 is small... 16.5mm or about .648".

The 4V one I built is a good horn but does not have very much presence in an ensemble. It's great for steet-corner caroling where I don't want to stand with or haul around a larger horn or sousa but there's no way to carry an ensemble with it.

Art suggest that a larger 4th valve (rotor) in the bugle after the valve section might be better than a small piston but I think what really hurts this horn more than anything is the LONG leadpipe with a straight bore main tuning slide. If I ever decide to build another one... I might try a different approach. However... that's sort of unlikely because parts horns are scarce and Yamaha doesn't make parts for them any more. The best thing about the horn is that you don't have to shop for specific pistons. The three of them interchange.

Three Valves · Post by **Three Valves** » Mon Jun 08, 2015 10:13 am

Would you say the Wisemann DTU-510 is a faithful clone of the Yamaha ybb-621??

Bob Kolada · Post by **Bob Kolada** » Mon Jun 08, 2015 2:21 pm

Where does the, uh, "classic", small front action Weril C/Bb fit in this comparison?

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Yamaha YBB-103 vs 621

Yamaha YBB-103 vs 621

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Re: Yamaha YBB-103 vs 621

Re: Yamaha YBB-103 vs 621

Re: Yamaha YBB-103 vs 621

Re: Yamaha YBB-103 vs 621

Re: Yamaha YBB-103 vs 621