Speaker Box Calculator
Calculate speaker enclosure dimensions and internal volume for optimal audio performance
Design Your Speaker Box
Typical thickness: 18-25mm (3/4" to 1")
Speaker Box Results
Basic Volume
0.00 L
Without speaker/port
Formula used: V = (w - 2×t) × (h - 2×t) × (d - 2×t) - V_speaker - V_port
Dimensions: 0×0×0 cm, Board: 20mm
Volume Analysis
Example: 12" Subwoofer Box
Specifications
Dimensions: 45×38×51 cm
Board thickness: 19mm (3/4")
Speaker: 12" driver
Port: 10cm diameter, 15cm long
Results
Basic volume: 67.3 L
Speaker displacement: -4.2 L
Port volume: -1.2 L
Net volume: 61.9 L
Speaker Box Types
Sealed Box
Tight, controlled bass
No port, airtight enclosure
Ported Box
Enhanced bass response
Tuned port for resonance
Bandpass
Specific frequency range
Complex dual-chamber design
Design Tips
Use 18-25mm thick boards for rigidity
Avoid perfect cube dimensions
Add internal bracing for large boxes
Consider driver specifications for volume
Understanding Speaker Box Design
Why Speaker Box Volume Matters
The internal air volume of a speaker box directly affects how the speaker driver performs. The air inside acts like a spring, controlling the movement of the speaker cone and influencing the frequency response, especially in the bass region.
Volume Effects
- •Smaller volume: Tighter, more controlled bass
- •Larger volume: Extended low-frequency response
- •Optimal volume: Balanced performance as per driver specs
Volume Calculation Formula
V = (w - 2×t) × (h - 2×t) × (d - 2×t)
V_air = V - V_speaker - V_port
- V: Basic internal volume
- w, h, d: External width, height, depth
- t: Board thickness
- V_speaker: Speaker driver displacement
- V_port: Port volume (if ported)
Important: Always check your speaker driver's recommended enclosure volume