Acoustic Engineering
Comprehensive technical specifications for bass cabinet design and performance optimization.
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Enclosure Parameters
- Thiele-Small: Qts 0.3-0.7
- Port Tuning: 20-80 Hz
- Box Q: 0.5-1.2 typical
- Volume Ratio: 1.4-2.1
- Compliance: Vas 20-200L
- Efficiency: 85-95 dB/W/m
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Material Properties
- MDF Density: 720-760 kg/m³
- Plywood: 11-ply minimum
- Resonance: 25-35 Hz
- Damping: 0.05-0.15 loss
- Rigidity: >2000 N/mm²
- Acoustic Loss: 0.1-0.3
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Driver Integration
- Xmax: 6-12mm peak
- Power Handling: 200-1000W
- Impedance: 4-8 ohms
- BL Factor: 10-20 T·m
- Cone Mass: 80-150g
- Voice Coil: 2-4" diameter
Design Optimization
Critical specifications for optimal bass response and efficiency:
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Port Design
- Velocity: <17 m/s max
- Length Ratio: 3:1-5:1
- Area Ratio: 8-12%
- Flare Radius: 1-2 inches
- Mach Number: <0.1
- Reynolds: <400,000
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Bracing Structure
- Spacing: 8-12 inches
- Cross-section: 2x2" min
- Window Size: <100 in²
- Edge Support: 1.5" min
- Corner Blocks: 3x3"
- Joint Strength: 400 psi
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Acoustic Treatment
- Absorption: 0.5-0.8 NRC
- Coverage: 50-75%
- Thickness: 1-2 inches
- Density: 1.5-3.0 pcf
- Air Gap: 1-3 inches
- Flow Resistivity: 5000 rayls/m
Performance Metrics
Key specifications for bass cabinet performance evaluation:
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Frequency Response
- F3 Point: 30-80 Hz
- Rolloff: 12-24 dB/oct
- Group Delay: <20ms
- Ripple: ±3 dB max
- Bandwidth: Q=0.707
- Phase Alignment: ±45°
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Power Response
- Sensitivity: 88-92 dB/W
- Max SPL: 120-130 dB
- Compression: <2 dB
- THD: <1% at rated
- Impedance Peak: 5:1 max
- Power Factor: >0.8
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Environmental Factors
- Temperature: 15-35°C
- Humidity: 20-80% RH
- Air Pressure: ±10%
- Vibration: <0.5g
- EMI Shielding: -40 dB
- Heat Dissipation: 200W