The RT-88+ has a heavier shell compared to the RT-88. This gives it stronger projection and a darker sound. Response is very stable and benefits both the low and high Register.
Formerly named Perantucci mouthpieces, this Robert Tucci mouthpiece is a very popular size. The cup of the RT-88 is wider yet not quite as deep as that of the RT-50. The sound has great strength and depth combined with huge dynamics over a wide range. The middle and low register benefit from the cup volume. The high register is secure yet mellow sounding.