【Pre-Order Samples】E-flat Lacquered Baritone Saxophone: Low A Key/Front F Key | Adjustable Bell + Hand-carved Finger Rest | Bullet Pivot Solid Brass Body | For Orchestra & Conservatory Use (No Case) 6438L-1 tianjinhuayi

★【Acoustic Engineering】  

- Adjustable Bell Ring: 360° resonance tuning for:  

  ● Concert Hall Mode: Boost 80-200Hz mid-bass  

  ● Street Performance Mode: Enhance 2kHz-5kHz projection  

  ● Studio Mode: Linear frequency response 20Hz-18kHz  

★【German Ergonomics】  

✓ Thumb Hook: Hand-engraved rose patterns (3.2mm±0.1mm depth, DIN 33402 compliant)  

✓ Pivot System: Bullet-shaped axle + brass bushings, ≤0.3N key resistance at -15℃  

★【Professional Keywork】  

■ Auxiliary Keys:  

  ● E♭ Low A: Extends range to 27.5Hz (German Big Band essential)  

  ● High F#: <8ms response time (Jazz solo tool)  

  ● Front F: ±2 cent intonation accuracy (Tested at UdK Berlin)  

■ Durability Features:  

  ● Polyster Key Buttons: 1.8mm thickness, 85D Shore hardness  

  ● Spring Arms: Phosphor bronze springs >500,000 cycles  

★【All-Weather Protection】  

- 3-Layer Lacquer: Epoxy primer + nitro lacquer + PU top coat (72h salt spray certified)  

- Mechanism: Stainless steel rods with antifreeze grease (-20℃ to 40℃)  

★【Eco-Packaging】  

⊛ Essentials Only:  

  ① Saxophone body (with silicone protector)  

  ② German manual (EU Ecodesign compliant)  

  ③ Zero accessories (37% less packaging)