The Royal Global adjustable barrel features an innovative patented adjusting system combining a premium aged grenadilla wood bore, Royal's proprietary ECO-wood material, and a new, heavier brass internal mechanism selected for its superior acoustical properties and longevity. This combination allows for a more durable, crack-resistant barrel that is easy to maintain. By manufacturing the top section and bore with grenadilla wood and the base with the new grenadilla ECO wood, the Royal Global adjustable barrel maintains a wooden bore that helps achieve the warm, rich, vibrant tone with depth.

Four indicators milled on the ring allow for easily repeatable adjustments, with marks every .25mm. There is no tenon gap created by pulling out the barrel to lower pitch, allowing for a more resonant, connected sound and reducing the possibility of leaking when adjusting. The length is adjustable from 64mm to 68mm and works for both Bb and A clarinets with "standard" size tenons (Buffet, Selmer Paris, Yamaha, etc.)

Bore
The Polaris Adjustable Barrel bore employs an inverted taper that helps to improve intonation, especially between the twelfths, as well as response and overall "focus" of the sound. There is a good balance of highs and lows, not too "dark" or "bright," but of course, this is subjective depending on the player and their set-up.

Plating
The Polaris Adjustable barrel is available in 4 different platings. Although we believe the bore dimensions, material, and overall mass of the barrel play a larger role in the sound, many people express similar opinions about certain platings having certain characteristics. These are summarised below.


Warranty
All barrels hold a 1-year warranty against manufacturer defects, including cracking not caused by user care.

• 4 point ring that allows for easily measured and repeatable adjustments, marked in .25mm increments from 64mm to 68mm

• Single twist smooth mechanism, using a double metal sleeve/socket to help prevent dimensional changes from influencing ring motion

• Inverted taper bore for increased response, better intonation, and ease of projection