Posted by LV on June 28, 2002 at 18:07:28:
In Reply to: Advice on purchasing a C tuba posted by Doug on June 28, 2002 at 15:55:21:
Doug, 
I will tread where the more intelligent have declined to go!  These are just my own casual observations.  My CC is a Rudy Meinl piston CC, so this is my frame of reference.
Conn 56J:  Based (loosely?) on the "American" school, 4 piston valves, 1 rotor,  Big, clear sound and free blowing. 
Mirafone 188:  5 rotors and dare I say a distinctively more "German" sound and feel.  To my ears, a little darker.   Well made, seem to be consistant horn to horn.   To me, not as free blowing.
PT4:  Never played one for more than just a toot, but...
these seem to be also well made.  If I were looking right now (yeah, right, I'm always looking!),  I'd ask Jeff at Custom about the PT20 or PT20P (piston).  These are a somewhat updated version of the PT4, with a slightly larger bell.  (kinda like 52J vs 56J)
Good luck,
LV