Building a subwoofer enclosure for two 15-inch woofers is a significant undertaking, requiring careful planning and execution to achieve optimal sound quality. This guide will walk you through the process, addressing common questions and considerations to help you build a high-performing sub box.
What Size Sub Box Do I Need for Two 15-Inch Subs?
This is the most crucial question, and the answer depends heavily on the specific subwoofer's specifications. Each 15-inch woofer will have a recommended enclosure volume specified by the manufacturer. This volume can be expressed as sealed, ported, or bandpass. Never ignore the manufacturer's recommendations. Using the wrong enclosure volume can severely damage your woofers or result in poor sound quality. Generally, two 15-inch subs in a sealed enclosure will require a significantly larger box than a single 15-inch sub. Expect the total internal volume to be between 6-10 cubic feet, but always consult your specific subwoofer's specifications.
What is the Best Type of Enclosure for Two 15-Inch Subwoofers?
Several enclosure types are suitable for dual 15-inch subwoofer setups, each with its own sonic characteristics:
-
Sealed: Sealed enclosures are simple to design and build. They offer tight, accurate bass with low distortion but generally produce less overall output than ported enclosures.
-
Ported (Bass Reflex): Ported enclosures utilize a port (tube) to extend the low-frequency response and increase output. They offer louder bass but can be more challenging to design and tune properly. Improper tuning can lead to unwanted resonance and distortion.
-
Bandpass: Bandpass enclosures are more complex and offer highly focused bass response within a specific frequency range. They are typically used in specialized applications where extreme output at a particular frequency is desired. However, they are more difficult to design and require advanced knowledge of acoustics.
Can I Build a Sub Box for Two 15s Myself?
Yes, many enthusiasts successfully build their own subwoofer enclosures. However, it requires woodworking skills, accurate measurements, and an understanding of subwoofer enclosure design principles. If you lack experience, it's advisable to start with a simpler sealed enclosure before attempting more complex designs. Improper construction can lead to poor sound quality and potential damage to your equipment.
How Much Will it Cost to Build a Sub Box for Two 15s?
The cost will vary based on the materials you choose. Expect to spend anywhere from $100 to $500 or more, depending on the wood type (e.g., MDF, plywood), bracing requirements, and the complexity of the design. Don't forget to factor in the cost of tools if you need to purchase them.
What Materials Do I Need to Build a Sub Box for Two 15s?
Common materials include:
- Medium-Density Fiberboard (MDF): A popular choice due to its density and ability to dampen vibrations.
- Plywood: A more affordable option but might require more bracing for stiffness.
- Wood Glue: Essential for strong joints.
- Screws: For added strength and stability.
- Polyurethane Sealant: To seal seams and prevent air leaks.
- Carpet or Paint: For finishing the enclosure.
- Port Material (if using a ported enclosure): Often PVC pipe or a custom-made port.
What are the Dimensions of a Sub Box for Two 15s?
There's no single answer. The dimensions depend entirely on the desired enclosure type (sealed, ported, bandpass) and the manufacturer's specifications for your specific 15-inch subwoofers. You'll need to use a subwoofer box calculator (many are available online) or design software to determine the optimal dimensions based on the required volume and port tuning frequency (if applicable).
Building a sub box for two 15-inch subwoofers is a rewarding project, resulting in a custom sound system tailored to your preferences. Remember to prioritize accuracy in measurements and construction to achieve the best possible performance. Always consult your subwoofer's specifications and utilize online resources or design software to ensure a successful build.
