[Y2-Y5] Acoustic Tuning Films for 40/50/70mm Headphone Drivers - 1.88mm Port Mod, Bass/Treble Adjustable Sound Damping Paper

Product Overview  
This series of acoustic tuning films is engineered for 40mm/50mm/70mm headphone drivers equipped with a central tuning port (original diameter: 4mm). By applying the film, the effective port diameter is reduced to 1.88mm, while four thickness options (Y2/Y3/Y4/Y5) enable precise adjustments across the entire frequency spectrum, from bass control to treble refinement.  
 
---
 
Core Technology  
The central tuning port is the primary channel for diaphragm backwave energy management. While the original 4mm port ensures baseline acoustic output, it often leads to issues like muddy bass and midrange phase distortion. Our tuning films optimize performance through:  
1. Airflow Damping Adjustment: Reducing the port diameter from 4mm to 1.88mm increases airflow resistance (damping coefficient +180%), suppressing chaotic diaphragm vibrations.  
2. Standing Wave Mitigation: Gradient-density fibers absorb cavity resonances (e.g., 200-800Hz), reducing soundstage distortion.  
3. Diffraction Suppression: Nanoscale pore structures (20-500 pores/cm²) minimize high-frequency diffraction, enhancing clarity above 10kHz.  
 
---
 
Model-Specific Effects  
Y2 (Ultra-Thin | 0.1mm Thickness)  
- Treble Enhancer  
  - High airflow rate (3.5L/min) reduces treble roll-off, boosting harmonics above 12kHz (+3.2dB).  
  - Ideal for: Classical orchestral details, electronic music spatial effects.  
 
Y3 (Balanced | 0.25mm Thickness)  
- Full-Range Optimizer  
  - Moderate airflow (2.2L/min) balances bass tightness (Q-value +0.3) and midrange presence (+1.8dB at 1-3kHz).  
  - Ideal for: Pop vocals, gaming immersion, and correcting midrange recessions.  
 
Y4 (Mid-Thick | 0.4mm Thickness)  
- Bass Controller  
  - Low airflow (1.0L/min) tames 50-150Hz resonances (-4dB) while preserving sub-bass extension (+1.5dB at 20Hz).  
  - Ideal for: Rock, hip-hop, and resolving bass bloat in high-output drivers.  
 
Y5 (Thick | 0.6mm Thickness)  
- Distortion Eliminator  
  - Ultra-low airflow (0.5L/min) suppresses harmonic distortion (THD <0.03% @94dB) for studio-grade accuracy.  
  - Ideal for: Studio monitoring, critical listening, and phase coherence correction.  

Installation Guide  
1. Clean the Port: Use the included nanofiber brush to remove dust from the original port.  
2. Apply the Film: Align the selected film with the central port and press gently to eliminate air bubbles.