1. What is a DIY Sealed Box Calculator?

Definition: This calculator estimates the internal volume of a sealed subwoofer box based on its dimensions.

Purpose: It helps audio enthusiasts and DIYers design properly sized enclosures for optimal subwoofer performance.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( V \) — Internal volume (cubic units)
• \( L \) — Internal length (any unit)
• \( W \) — Internal width (same unit)
• \( H \) — Internal height (same unit)

Explanation: The three dimensions are multiplied together to calculate the internal volume of the enclosure.

3. Importance of Proper Box Volume

Details: Correct box volume is crucial for achieving the desired frequency response, power handling, and sound quality from your subwoofer.

4. Using the Calculator

Tips: Enter the internal dimensions of your box (after accounting for material thickness). All values must be > 0. Use consistent units for all measurements.

5. Frequently Asked Questions (FAQ)

Q1: Should I use internal or external dimensions?
A: Always use internal dimensions for volume calculations. Subtract material thickness (typically 0.75" for MDF) from each side.

Q2: How does volume affect subwoofer performance?
A: Smaller boxes produce tighter bass but less low-end extension, while larger boxes provide deeper bass but may sound less controlled.

Q3: What about ported boxes?
A: This calculator is for sealed boxes only. Ported boxes require more complex calculations including port dimensions.

Q4: Should I account for subwoofer displacement?
A: Yes, subtract the subwoofer's displacement volume (provided in specs) from the total box volume for accurate results.

Q5: What's the best unit to use?
A: Inches are most common for DIY projects in the US, but any unit works as long as all dimensions use the same unit.