AR Resonance - Brass Gold Trombone/Euphonium/Tuba Mouthpiece Backbore

Specifications:

Tenor Trombone: available in Small or Large Shank and with 6.0mm or 6.5mm throat 

Small

Medium
Large

Symphonic Trombone: available with 7.2mm throat

GR0 72: tightest, good for soloists or for hard pieces for first trombones

GR1 72: for experienced first trombones

GR2 72: for second trombones or players looking for a fuller sound in the low register

GR3 72: for third trombones or players doubling on bass trombone

Bass Trombone: available with 8.0mm throat

GR0 80: for players who need to play in the high register from time to time 
GR1 80: the all rounder 

GR2 80: full deep sound

GR3 80: for the biggest sound on the low notes

You can choose parameters like the length of the cylindrical part of the throat, the average internal taper, the wall thickness at the end of the shank and so on.

If you desire a bigger sound or a faster and cleaner articulation, you are always covered.

And always with the world renown intonation and consistency of sound throughout the entire range of the instrument.

We don't like extremes with out cups and rims, we prefer offering "middle of the road" sizes adjusting the feel with a proper backbore and changing the curve going from the cup to the throat. Most of the mouthpieces we have analyzed employ a V shaped transition to the cup that offers no tone enhancements while making articulation and attacks a lot sloppier. We don't like that, we want your life to be easier so we designed an edgier transition to the throat. This makes articulation a lot easier and notes pop more.

Try them and you will understand why few weeks after we announced our trombone line principal players from major orchestras, L.A. studio legends, world renown jazz soloist switched to Resonance immediately!