AR Resonance Low Brass Backbores

We are so excited to be a dealer for Antonio's incredible pieces!

Members of our ACB Low Brass Team have been playing on AR Resonance for years and rave about them! The craftsmanship is outstanding and this comes through in their performance. Discover these remarkable mouthpieces for yourself!  

Tenor Trombone

• available in 6.0mm or 6.5mm throat 
• small shank unless otherwise indicated as large shank
• available in Small or Large Shank 
• If you do not see the size you want available in stock call us 816-410-0826 (allow 2-4 weeks for delivery)
• Backbores come in three sizes (taper) - Small, Medium, or Large (indicated by letter at the begining)
• How to read (example) S 6.0 = Small 6.0mm throat (small shank)

Symphonic Trombone with 7.2mm throat (large shank only)

If you do not see the size you want listed as available in stock call us 816-410-0826 (allow 2-4 weeks for delivery)

• 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 with 8.0mm throat (bass trombone/large shank only)

If you do not see the size you want listed as available in stock call us 816-410-0826 (allow 2-4 weeks for delivery)​

• 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

Euphonium Backbores (all items in stock are large shank)

If you do not see the size you want available in stock call us 816-410-0826 (allow 2-4 weeks for delivery). Contact us directly to special order small shank or Euroshank backbores - 816-410-0826

There are 3 sizes available:

• Small (custom order at this time, contact us)
• Medium
• Large​

The smaller the backbore the tighter is the feel but also the more focused is the sound and slots are more stable. Larger backbores give a broader sound, more open feel and notes can be bent more easily.

 Throat diameter is 7.2mm throat on all models, slightly smaller than the typical Denis Wick 7.4mm. This is meant to make articulation and high notes easier to achieve.

Tuba Backbore (currently only available in GR1 and GR2 sizes)

If you do not see the size you want available in stock call us 816-410-0826 (allow 2-4 weeks for delivery)

Backbores are available in 8.0mm or 8.4mm throat

• GR1: the all rounder 
• GR2: full deep sound

Special orders are available. Contact us directly for pricing and to order. 816-410-0826. 

We generally do not keep Gold Plated Tops or Backbores in stock - allow additional 2-3 weeks delivery time for gold plating. Thank you. 

Need an AR Resonance Top?  AR Resonance Low Brass Tops

If you have additional questions, please send us an email!  

Prior to ordering please check our Shipping and Returns policy.

AR Resonance tops and backbores are subject to a $25 per piece restocking fee to cover the inspection, sanitization, and re-conditioning the pieces.

Also note weight indicated in the ad is shipping weight not actual weight of the items.