How To Order A Custom Box Design

Ordering a custom subwoofer enclosure blueprint from EZ DB's Designs is simple — but to get the results you’re after, it’s important to understand a few key things before placing your order. This guide will walk you through the process step-by-step to help you make the right decisions for your build.

📌 Step 1: Decide What Enclosure Style You Want (And Make Sure You Have the Space)

Before anything else, figure out which enclosure style best suits your build. A good way to start is by asking yourself:

  • What bandwidth am I looking for?
  • What are my goals with this build?
  • Do I have enough usable volume/space available for the enclosure type I want to run?

If you’re unsure whether your available space will work for the enclosure style and goals you have in mind, reach out to EZ DB's Designs before placing your order.

📌 Step 2: Familiarize Yourself with Frequencies and Bandwidth

If you aren’t already familiar with audio frequencies, take a little time to get acquainted. This will help you understand what you're after in terms of sound.

How to do this: Play individual test tones in your current car audio setup, headphones, or home theater system. Pay attention to what frequencies sound best to you and fit your goals. Doing this will give you a hands-on feel for your desired bandwidth.

📌 Step 3: Understand the Balance Between Low-End and Output

As a general rule:

  • The lower you want to play, the more overall output you may sacrifice.
  • The higher you tune, the more output you can get — but you’ll lose some of that low-end extension.

It’s always a balance, and knowing your priorities upfront makes choosing an enclosure much easier.

📌 Step 4: Learn the Characteristics of Each Enclosure Style

🔹 Ported Enclosures

  • Flexible tuning range — can be tuned low or high within reason.
  • Compact space requirements compared to other enclosure styles.
  • A solid all-around choice for daily builds, SPL setups, or SQL systems.

🔹 4th Order Bandpass Enclosures

  • Much less design flexibility than a ported box.
  • Performance depends on the specific subwoofer and sealed chamber resonance.
  • Subwoofer magnets are typically inverted for cooling and fitment.
  • Generally play strong down to the low/mid 20 Hz range with the right subwoofer.
  • Ideal sub parameters: Qts around 0.5 and EBP (Fs ÷ Qes) of 50 and below.

🔹 6th Order Bandpass Enclosures

  • Very flexible platform — both chambers can be tuned individually.
  • Known as bandwidth beasts — wide range without sacrificing output.
  • Can play strong down into the mid-teens (Hz) if desired.
  • Trade-off: Requires more internal volume/space.
  • Subwoofer magnets typically go in the rear chamber to reduce audible motor cooling noise.

📌 Step 5: Decide on Your Enclosure Layout Inside the Vehicle

The enclosure layout refers to how the subwoofers and port(s) are positioned inside your vehicle. This can drastically affect how your system sounds.

Direction meanings:

  • Back = Toward the rear of the vehicle
  • Up = Toward the roof of the vehicle
  • Forward = Toward the front of the vehicle
  • Side = Toward the driver or passenger side of the vehicle

🔹 Trunk Box

        Sub(s): Back
        Port (Ported Enclosure): Back
        Port (Bandpass Enclosure): Back

🔹 No-Wall SUV Box

        Sub(s): Up
        Port (Ported Enclosure): Back
        Port (Bandpass Enclosure): Back

🔹 C-Pillar Walled Box

        Sub(s): Forward
        Port: Along the top of the box to clear the second-row bench seats.
        Note: If you have second-row captain’s seats and want a centered port, mention this in the order notes.

🔹 B-Pillar Walled Box

        Sub(s): Forward
        Port options: Top, Centered, or Driver Side

🔹 Under-Seat Truck Box

        Sub(s): Forward
        Port options: Side or Forward (Side is preferred if there’s clearance).
        Note: Mention your desired direction in the order notes.

🔹 Extended Cab Behind-Seat Truck Box

        Sub(s): Up
        Port options: Up or Side.
        Note: Mention your desired direction in the order notes.

🔹 Center Console Box

        Sub(s): Up
       Port options: Back or Up (toward the rear of the box).
       Note: Mention your desired direction in the order notes.

📌 Step 6: Pull Accurate Measurements

Before placing your order, it’s crucial to have your usable enclosure space measured correctly. This ensures your blueprint will fit and perform the way it’s intended.

How to do this: Measure the usable space inside your vehicle where the enclosure will be placed — including height, width, depth, and any restrictions like seat tracks, amps, or trim panels. Take note of anything that could interfere with fitment.

Need help measuring? Check out the full step-by-step guide here: How to Pull Your Own Measurements.

📌 Step 7: Place Your Order

Once you’ve:

  • Decided on your enclosure style
  • Determined your desired bandwidth and goals
  • Familiarized yourself with frequency ranges
  • Confirmed you have the space for your plan
  • Selected your enclosure layout inside your vehicle
  • Pulled accurate measurements

…you’re ready to place your order! Be sure to provide as much detail as possible about your subwoofer, goals, and any vehicle space limitations when filling out the order form.

✅ Final Thoughts

Choosing the right enclosure style, layout, and build plan upfront ensures your system will meet your performance goals and vehicle fitment needs. If you ever have questions or want help deciding what layout would work best for your vehicle, don’t hesitate to contact EZ DB's Designs.