The RT-48+ provides all of the best qualities of the RT-48 with the tonal stability provided by the heavy shell design. The added weight allows more projection of the sound while retaining a dark core of sound. It works really well when very loud dynamics are required but also makes the response easy for soft dynamics.
Cup: Inner Diameter 33mm/1.3in, deep pear shaped cup
Rim: Width: 8mm/0.3in, rounded inner and outer edges