More Keys. More Range. Same Beginner-Friendly Design.

The Aurosus AU-CL-S1 is an 18-key Bb student clarinet built for beginners who want the full standard key set from day one. The additional key over a 17-key model gives students access to alternate fingerings and extended technique earlier in their development — without adding complexity that overwhelms a first-time player. Paired with a durable ABS body and precision nickel-plated keywork, the AU-CL-S1 is ready for school band, private lessons, and daily home practice.

Why Choose the 18-Key AU-CL-S1

18 Nickel-Plated Keys — Includes the full standard key set plus one additional key for alternate fingerings; supports more advanced technique as students progress beyond beginner level
Durable ABS Body — Resists cracking and warping in variable humidity and temperature; ideal for daily student transport and school environments
Smooth Key Action — Precision-engineered keywork delivers consistent response across all registers
Ergonomic Key Spacing — Comfortable hand positioning reduces fatigue during extended practice and band rehearsals
Matte Finish — Clean, understated appearance that resists fingerprints and minor wear through regular classroom use

Specifications

Key: Bb | Body: ABS | Keys: 18 nickel-plated
Finish: Matte | Condition: New | Brand: Aurosus | Model: AU-CL-S1

Complete 10-Piece Beginner Kit Includes

AU-CL-S1 Bb clarinet body (upper joint, lower joint, bell, barrel)
Standard mouthpiece, reeds, ligature & mouthpiece cap
Protective carrying case, cleaning cloth, pull-through swab
Cork grease, mouthpiece brush, key brush, thumb rest cushion, reed case

17-Key vs 18-Key: Which Should You Choose?

If you're a complete beginner starting from scratch, either model works well. The 18-key AU-CL-S1 is the better choice if your method book or teacher requires the full standard key set, or if you plan to progress quickly beyond beginner repertoire.

Who Is This For?

The AU-CL-S1 is ideal for first-time clarinet students, school band members whose program requires an 18-key instrument, and young learners who want room to grow without upgrading their instrument too soon.

Browse our full Student Clarinet collection to compare 17-key and 18-key ABS models.

Need help with instrument care? Read: Beginner-Friendly Care Guide for Flutes and Saxophones

Aurosus AU-CL-S1 Bb Student Clarinet – ABS Body, 18-Key, Beginner Set with Case & Mouthpiece