The break-in on the valves of the Wisemann has been a bit of a chore. I had to send the first 900 back to Tom at Mack due to ongoing problems with the rotor action which I could not get a tech to solve. I even took the horn to Orlando (3 hour drive r/t) to a well respected tech. Tom accepted the horn back and promptly shipped me another 900. After return, on inspection Tom informed me there was lacquer overspray in the rotor housing on the first horn which he was able to fix. Somehow this went unnoticed to the tech in Orlando? Shortly after I got the second horn I decided to get some fine diamond lapping compound and lapped the first piston myself due to ongoing sticking. Tolerances? Residual manufacturing crud? I've read on Tubenet that the valve-to-casing tolerances on the Wisemann are pretty tight. I can definitely confirm that. I'm about a year in and the valves are now problem free although I do wish they used a valve cap threading that was not so darn narrow. This has also been discussed on Tubenet. The remainder of the build quality on mine seems pretty decent. Overall I am very happy with the horn but the manufacturer and/or distributor could have spent a bit more time with post-manufacture fine tuning. For me the two MPs which really power this horn well are the Stofer Geib and the newer style GW Bayamo. Regarding "the gap" the receiver fits PT mouthpieces pretty much right on with a little extra gap. The GW American shank goes in a bit too far and GW Euro not quite far enough although both work, but the horn responds and sounds best with a Euro shank piece and larger gap. My American shank Stofer Geib fits like the GW American shank, fully functional with a bit of Teflon tape. Even as such it's a great piece and well matched to the horn in my opinion. Of interest, the Blokepiece American shank fits the 900 receiver with an ideal (if that exists) gap. The end of my MP journey will be a Euro shank Stofer Geib as the the Stofer piece is a pleasure to play and the 900 just seems to respond better for me with larger shank and gap pieces for some reason. AGR would sure be be nice! Bottom line, even though this is a lot of horn for the money, if the Chinese manufacturers are going to raise their price point as with the Wisemann, the consumer should expect a properly set up horn on delivery. Just some frank notes to help others. Overall, the horn is a pleasure to play and perform with!
Bob Tampa FL USA
Euph -- 1984 B&H Round Stamp Sovereign 967 / 1978 Besson NS 767 / Early 90s Sterling MP: 4AL and GW Carbonaria
Tuba -- 2014 Wisemann 900 CC / 2013 Mack 410 MP: Blokepiece Symphony American Shank and 33.2 #2 Rim
Bookmarks