How To Order A Custom Subwoofer Box Design
Choose a design around three things: your listening goals, your subwoofers, and the space available. We supply digital blueprints; you or your installer build the enclosure.
1. Set Your Low-Frequency Goal
The form asks for the lowest frequency you want reproduced, not the enclosureβs tuning frequency. Analyze several tracks that represent the deepest bass you regularly play. Use their lowest meaningful bass note to choose your target, rather than their loudest peak.
The analyzer shows the lowest distinct bass note within 10 dB of the strongest average bass peak (0 to β10 dB), between 10 and 80 Hz. Quieter notes are excluded, and short hits can be missed. Compare several representative tracks rather than treating one result as an exact lower limit.
Frequency tool
EZ DB's Bass Frequency Analyzer
Find the lowest distinct bass note detected in your track, then use it to help choose your low-frequency goal.
MP3, WAV, M4A and AAC, where supported by your browser. Up to 25 MB. Audio stays on your device.
Waiting for file.
Detected notes (0 to β10 dB)
Reported notes are within 10 dB of the strongest average bass peak (0 to β10 dB), between 10 and 80 Hz. Quieter notes and brief hits are excluded or may be missed. Compare several tracks; this is a guide to prominent bass, not an exact lower limit.
Choose an available form option at or below your target. If your target is below that productβs available options, contact us before ordering. A frequency choice is a design goal, not a guaranteed response regardless of equipment or space.
2. Balance Output, Extension, and Space
Lower extension, high output, and a small enclosure compete for the same space and driver capability. Tell us what matters most: deep bass, maximum output, or a balanced daily system. Do not choose solely from a frequency number.
Subwoofer Specs Worth Knowing
Qts describes the driverβs total damping. EBP = Fs Γ· Qes is a rough enclosure-selection guide. Lower EBP often suggests sealed suitability; higher EBP often suggests vented suitability. These are screening clues, not pass/fail rules. Final suitability depends on the full T/S parameters, excursion, power, alignment, and available volume. Send the exact model/version if unsure.
3. Choose Your Box Style
Custom or reconed drivers: If the motor, cone, suspension, or voice coil differs from the stock model, send measured T/S parameters from one broken-in driver using DATS v3, DATS LA, or an equivalent impedance-measurement tool. Stock specifications may no longer represent it.
Sealed Box
Best suited to: Compact, straightforward systems where smooth response and packaging matter.
Sealed airspace controls the driver without a port. It is often smaller than an equivalent vented design, but deep-bass output still depends on the driver, power, and cabin.
Check before ordering: No port-clearance requirement; leave room for the cone and mounting hardware.
Layout and Measurements
Back means toward the rear of the vehicle; Forward means toward the front; Up means toward the roof. Side means driver or passenger side. Choose your layout, follow the Measurement Guide, and include all fitment constraints.
Product Form Walkthrough
These fields follow the current product form order. Complete the required items and review any option charges on the product page.
Equipment & vehicle
Subwoofer Brand/Model/Version:Required
Enter the exact brand, model, revision, and voice-coil version so we can use the correct specifications.
Subwoofer Size:Required
Choose the actual driver size from the options on this product.
How Many Subwoofers?:Required
Choose the number of matching drivers in this enclosure. Any add-on charge is shown in the dropdown.
Vehicle Year/Make/Model:Required
Include year, make, model, trim, and truck cab style where relevant.
Your Wood Sheet Thickness:Required
Choose the actual sheet thickness you will build with. Metric options identify metric blueprints. Follow any field-specific unit instructions and label metric dimensions in your drawing and Custom Requests.
Available space
Measurement ShapeRequired
Choose Rectangular for one limiting height/width/depth; choose Complex for an angled or notched shape that needs multiple dimensions and a labeled drawing. Use the charge shown on this product.
Max Height (Top to Bottom):Required
Enter the limiting usable top-to-bottom dimension. Follow the measurement guide for your build, including window-height limits for a no-wall SUV.
Max Width (Left to Right):Required
Enter the limiting usable left-to-right width. For a rectangular fit, use the narrowest point, often between wheel wells.
Max Depth (Front to Back):Required
Enter the limiting usable front-to-back depth with seats in use and the hatch/lid closed. Sedan trunk depth is checked at the top and far sides.
Complex Measurements Shape File Upload:Required for Complex
Required when Complex is selected. Upload a labeled sketch of the shape, with dimensions and views that locate every change in the space.
Design preferences
Box Type/Location:Required
Choose the vehicle location and firing directions that match your build. Use Other and explain the layout in Custom Requests if no preset fits.
Custom RequestsOptional
Include every constraint and preference: clearance already reserved or still needed, seat type, port direction, mounting preferences, windows, and unusual fitment. Repeat relevant details even if discussed previously.
Review your order
Digital Blueprint & Turnaround AcknowledgementRequired
Read and accept the digital-blueprint acknowledgement and the current turnaround time posted at the top of the website.
Physical Fit & Refund AcknowledgementRequired
Read the acknowledgement about requests that cannot fit physically, adjustments, and the stated refund conditions.
Design Constraints & Revision AcknowledgementRequired
Confirm all required constraints are included in this form. Missing information can affect revision eligibility.
Ported Box
Best suited to: Daily systems wanting extra output around a designed tuning range.
A vented chamber combines driver and port output. It needs volume and a correctly sized port; output and excursion change below tuning.
Check before ordering: Keep the port mouth unobstructed and use the protective filtering specified for the completed design.
Layout and Measurements
Back means toward the rear of the vehicle; Forward means toward the front; Up means toward the roof. Side means driver or passenger side. Choose your layout, follow the Measurement Guide, and include all fitment constraints.
Product Form Walkthrough
These fields follow the current product form order. Complete the required items and review any option charges on the product page.
Equipment & vehicle
Subwoofer Brand/Model/Version:Required
Enter the exact brand, model, revision, and voice-coil version so we can use the correct specifications.
Subwoofer Size:Required
Choose the actual driver size from the options on this product.
How Many Subwoofers?Required
Choose the number of matching drivers in this enclosure. Any add-on charge is shown in the dropdown.
Vehicle Year/Make/Model:Required
Include year, make, model, trim, and truck cab style where relevant.
Your Wood Sheet Thickness:Required
Choose the actual sheet thickness you will build with. Metric options identify metric blueprints. Follow any field-specific unit instructions and label metric dimensions in your drawing and Custom Requests.
Available space
Measurement ShapeRequired
Choose Rectangular for one limiting height/width/depth; choose Complex for an angled or notched shape that needs multiple dimensions and a labeled drawing. Use the charge shown on this product.
Max Height (Top to Bottom):Required
Enter the limiting usable top-to-bottom dimension. Follow the measurement guide for your build, including window-height limits for a no-wall SUV.
Max Width (Left to Right):Required
Enter the limiting usable left-to-right width. For a rectangular fit, use the narrowest point, often between wheel wells.
Max Depth (Front to Back):Required
Enter the limiting usable front-to-back depth with seats in use and the hatch/lid closed. Sedan trunk depth is checked at the top and far sides.
Complex Measurements Shape File Upload:Required for Complex
Required when Complex is selected. Upload a labeled sketch of the shape, with dimensions and views that locate every change in the space.
Measurement Type (Are you measuring inside a pre-existing shell, or an empty space?)Required
Choose the exact condition: empty external space, internal shell with no front/back panels, or internal shell with its back panel installed. Do not subtract panel thickness twice.
Design preferences
Box Type/Location:Required
Choose the vehicle location and firing directions that match your build. Use Other and explain the layout in Custom Requests if no preset fits.
Lowest FrequencyRequired
Choose the lowest musical frequency you want the design to reproduce, not a tuning frequency. Current options: 20β30 Hz; Default is 25 Hz. If your target falls outside them, contact us before ordering.
Custom RequestsOptional
Include every constraint and preference: clearance already reserved or still needed, seat type, port direction, mounting preferences, windows, and unusual fitment. Repeat relevant details even if discussed previously.
Review your order
Digital Blueprint & Turnaround AcknowledgementRequired
Read and accept the digital-blueprint acknowledgement and the current turnaround time posted at the top of the website.
Physical Fit & Refund AcknowledgementRequired
Read the acknowledgement about requests that cannot fit physically, adjustments, and the stated refund conditions.
Design Constraints & Revision AcknowledgementRequired
Confirm all required constraints are included in this form. Missing information can affect revision eligibility.
4th Order Bandpass
Best suited to: Projects where the chosen drivers and available space suit a sealed/vented bandpass alignment.
The driver works between a sealed chamber and a vented chamber; sound reaches the vehicle through the port. Bandwidth and output depend on the chamber ratio and tuning.
Check before ordering: Normal or inverted mounting is a design decision, not a universal requirement. Allow access for wiring and service.
Layout and Measurements
Back means toward the rear of the vehicle; Forward means toward the front; Up means toward the roof. Side means driver or passenger side. For bandpass designs, the cabin-facing output is the port; drivers are inside the enclosure. Choose your layout, follow the Measurement Guide, and include all fitment constraints.
Product Form Walkthrough
These fields follow the current product form order. Complete the required items and review any option charges on the product page.
Equipment & vehicle
Subwoofer Brand/Model/Version:Required
Enter the exact brand, model, revision, and voice-coil version so we can use the correct specifications.
Subwoofer Size:Required
Choose the actual driver size from the options on this product.
How Many Subwoofers?Required
Choose the number of matching drivers in this enclosure. Any add-on charge is shown in the dropdown.
Vehicle Year/Make/Model:Required
Include year, make, model, trim, and truck cab style where relevant.
Your Wood Sheet Thickness:Required
Choose the actual sheet thickness you will build with. Metric options identify metric blueprints. Follow any field-specific unit instructions and label metric dimensions in your drawing and Custom Requests.
Available space
Measurement ShapeRequired
Choose Rectangular for one limiting height/width/depth; choose Complex for an angled or notched shape that needs multiple dimensions and a labeled drawing. Use the charge shown on this product.
Max Height (Top to Bottom):Required
Enter the limiting usable top-to-bottom dimension. Follow the measurement guide for your build, including window-height limits for a no-wall SUV.
Max Width (Left to Right):Required
Enter the limiting usable left-to-right width. For a rectangular fit, use the narrowest point, often between wheel wells.
Max Depth (Front to Back):Required
Enter the limiting usable front-to-back depth with seats in use and the hatch/lid closed. Sedan trunk depth is checked at the top and far sides.
Complex Measurements Shape File Upload:Required for Complex
Required when Complex is selected. Upload a labeled sketch of the shape, with dimensions and views that locate every change in the space.
Measurement Type (Are you measuring inside a pre-existing shell, or an empty space?)Required
Choose the exact condition: empty external space, internal shell with no front/back panels, or internal shell with its back panel installed. Do not subtract panel thickness twice.
Design preferences
Box Type/Location:Required
Choose the vehicle location and firing directions that match your build. Use Other and explain the layout in Custom Requests if no preset fits.
Lowest FrequencyRequired
Choose the lowest musical frequency you want the design to reproduce, not a tuning frequency. Current options: 22β30 Hz; Default is 25 Hz. If your target falls outside them, contact us before ordering.
Custom RequestsOptional
Include every constraint and preference: clearance already reserved or still needed, seat type, port direction, mounting preferences, windows, and unusual fitment. Repeat relevant details even if discussed previously.
Review your order
Digital Blueprint & Turnaround AcknowledgementRequired
Read and accept the digital-blueprint acknowledgement and the current turnaround time posted at the top of the website.
Physical Fit & Refund AcknowledgementRequired
Read the acknowledgement about requests that cannot fit physically, adjustments, and the stated refund conditions.
Design Constraints & Revision AcknowledgementRequired
Confirm all required constraints are included in this form. Missing information can affect revision eligibility.
6th Order Bandpass
Best suited to: Larger projects needing a tailored bandpass response and suitable drivers.
Both chambers are vented. The two chamber tunings and their interaction shape the response; a 6th order is not automatically the deepest or loudest choice.
Check before ordering: Provide enough space for both chambers, ports, bracing, and service access. Window position can affect cabin response, but is not a universal operating requirement.
Layout and Measurements
Back means toward the rear of the vehicle; Forward means toward the front; Up means toward the roof. Side means driver or passenger side. For bandpass designs, the cabin-facing output is the port; drivers are inside the enclosure. Choose your layout, follow the Measurement Guide, and include all fitment constraints.
Product Form Walkthrough
These fields follow the current product form order. Complete the required items and review any option charges on the product page.
Equipment & vehicle
Subwoofer Brand/Model/Version:Required
Enter the exact brand, model, revision, and voice-coil version so we can use the correct specifications.
Subwoofer Size:Required
Choose the actual driver size from the options on this product.
How Many Subwoofers?Required
Choose the number of matching drivers in this enclosure. Any add-on charge is shown in the dropdown.
Vehicle Year/Make/Model:Required
Include year, make, model, trim, and truck cab style where relevant.
Your Wood Sheet Thickness:Required
Choose the actual sheet thickness you will build with. Metric options identify metric blueprints. Follow any field-specific unit instructions and label metric dimensions in your drawing and Custom Requests.
Available space
Measurement ShapeRequired
Choose Rectangular for one limiting height/width/depth; choose Complex for an angled or notched shape that needs multiple dimensions and a labeled drawing. Use the charge shown on this product.
Max Height (Top to Bottom):Required
Enter the limiting usable top-to-bottom dimension. Follow the measurement guide for your build, including window-height limits for a no-wall SUV.
Max Width (Left to Right):Required
Enter the limiting usable left-to-right width. For a rectangular fit, use the narrowest point, often between wheel wells.
Max Depth (Front to Back):Required
Enter the limiting usable front-to-back depth with seats in use and the hatch/lid closed. Sedan trunk depth is checked at the top and far sides.
Complex Measurements Shape File Upload:Required for Complex
Required when Complex is selected. Upload a labeled sketch of the shape, with dimensions and views that locate every change in the space.
Measurement Type (Are you measuring inside a pre-existing shell, or an empty space?)Required
Choose the exact condition: empty external space, internal shell with no front/back panels, or internal shell with its back panel installed. Do not subtract panel thickness twice.
Design preferences
Box Type/Location:Required
Choose the vehicle location and firing directions that match your build. Use Other and explain the layout in Custom Requests if no preset fits.
Lowest FrequencyRequired
Choose the lowest musical frequency you want the design to reproduce, not a tuning frequency. Current options: 15β30 Hz; Default is 25 Hz. If your target falls outside them, contact us before ordering.
Custom RequestsOptional
Include every constraint and preference: clearance already reserved or still needed, seat type, port direction, mounting preferences, windows, and unusual fitment. Repeat relevant details even if discussed previously.
Review your order
Digital Blueprint & Turnaround AcknowledgementRequired
Read and accept the digital-blueprint acknowledgement and the current turnaround time posted at the top of the website.
Physical Fit & Refund AcknowledgementRequired
Read the acknowledgement about requests that cannot fit physically, adjustments, and the stated refund conditions.
Design Constraints & Revision AcknowledgementRequired
Confirm all required constraints are included in this form. Missing information can affect revision eligibility.
4th Order Blow-Thru
Best suited to: Truck-bed builds delivering sound into the cab through an opening.
This uses a 4th-order bandpass alignment in the bed. The port extension must match the bed-to-cab geometry.
Check before ordering: Measure the opening and port projection before ordering. Vehicle modifications and weather sealing require a qualified installer; do not cut first and assume the design will fit.
Layout and Measurements
Back means toward the rear of the vehicle; Forward means toward the front; Up means toward the roof. Side means driver or passenger side. For bandpass designs, the cabin-facing output is the port; drivers are inside the enclosure. Choose your layout, follow the Measurement Guide, and include all fitment constraints.
Product Form Walkthrough
These fields follow the current product form order. Complete the required items and review any option charges on the product page.
Equipment & vehicle
Subwoofer Brand/Model/Version:Required
Enter the exact brand, model, revision, and voice-coil version so we can use the correct specifications.
Subwoofer Size:Required
Choose the actual driver size from the options on this product.
How Many Subwoofers?Required
Choose the number of matching drivers in this enclosure. Any add-on charge is shown in the dropdown.
Vehicle Year/Make/Model:Required
Include year, make, model, trim, and truck cab style where relevant.
Your Wood Sheet Thickness:Required
Choose the actual sheet thickness you will build with. Metric options identify metric blueprints. Follow any field-specific unit instructions and label metric dimensions in your drawing and Custom Requests.
Available space
Measurement ShapeRequired
Choose Rectangular for one limiting height/width/depth; choose Complex for an angled or notched shape that needs multiple dimensions and a labeled drawing. Use the charge shown on this product.
Max Height (Top to Bottom):Required
Enter the limiting usable top-to-bottom dimension. Follow the measurement guide for your build, including window-height limits for a no-wall SUV.
Max Width (Left to Right):Required
Enter the limiting usable left-to-right width. For a rectangular fit, use the narrowest point, often between wheel wells.
Max Depth (Front to Back):Required
Enter the limiting usable front-to-back depth with seats in use and the hatch/lid closed. Sedan trunk depth is checked at the top and far sides.
Complex Measurements Shape File Upload:Required for Complex
Required when Complex is selected. Upload a labeled sketch of the shape, with dimensions and views that locate every change in the space.
How Far Should The Port Stick Out From The Front Of The Box To Be Flush With The Back Wall Of The Cabin?Required
Choose how far the port must project from the front face of the box to finish flush at the back wall of the cab. Measure the actual gap and account for the sealing connection.
Minimum Height From Bed To Bottom Of Port:Required
Measure vertically from the same bed-floor datum to the lowest permitted bottom edge of the cab port opening.
Max Height From Bed To Top Of Port:Required
Measure vertically from that same bed-floor datum to the highest permitted top edge. This is an elevation, not the opening height itself.
Max Port Width (Left To Right):Required
Enter the usable left-to-right opening width after allowing for trim, seals, and obstructions.
Design preferences
Lowest FrequencyRequired
Choose the lowest musical frequency you want the design to reproduce, not a tuning frequency. Current options: 22β30 Hz; Default is 25 Hz. If your target falls outside them, contact us before ordering.
Custom RequestsOptional
Include every constraint and preference: clearance already reserved or still needed, seat type, port direction, mounting preferences, windows, and unusual fitment. Repeat relevant details even if discussed previously.
Review your order
Digital Blueprint & Turnaround AcknowledgementRequired
Read and accept the digital-blueprint acknowledgement and the current turnaround time posted at the top of the website.
Physical Fit & Refund AcknowledgementRequired
Read the acknowledgement about requests that cannot fit physically, adjustments, and the stated refund conditions.
Design Constraints & Revision AcknowledgementRequired
Confirm all required constraints are included in this form. Missing information can affect revision eligibility.
6th Order Blow-Thru
Best suited to: Truck-bed projects where a 6th-order alignment fits the drivers, footprint, and goals.
This uses two vented chambers in the bed, with output routed into the cab. Fitment is as important as acoustic tuning.
Check before ordering: Confirm the full bed footprint, cab opening, port extension, weather protection, and access for servicing.
Layout and Measurements
Back means toward the rear of the vehicle; Forward means toward the front; Up means toward the roof. Side means driver or passenger side. For bandpass designs, the cabin-facing output is the port; drivers are inside the enclosure. Choose your layout, follow the Measurement Guide, and include all fitment constraints.
Product Form Walkthrough
These fields follow the current product form order. Complete the required items and review any option charges on the product page.
Equipment & vehicle
Subwoofer Brand/Model/Version:Required
Enter the exact brand, model, revision, and voice-coil version so we can use the correct specifications.
Subwoofer Size:Required
Choose the actual driver size from the options on this product.
How Many Subwoofers?Required
Choose the number of matching drivers in this enclosure. Any add-on charge is shown in the dropdown.
Vehicle Year/Make/Model:Required
Include year, make, model, trim, and truck cab style where relevant.
Your Wood Sheet Thickness:Required
Choose the actual sheet thickness you will build with. Metric options identify metric blueprints. Follow any field-specific unit instructions and label metric dimensions in your drawing and Custom Requests.
Available space
Measurement ShapeRequired
Choose Rectangular for one limiting height/width/depth; choose Complex for an angled or notched shape that needs multiple dimensions and a labeled drawing. Use the charge shown on this product.
Max Height (Top to Bottom):Required
Enter the limiting usable top-to-bottom dimension. Follow the measurement guide for your build, including window-height limits for a no-wall SUV.
Max Width (Left to Right):Required
Enter the limiting usable left-to-right width. For a rectangular fit, use the narrowest point, often between wheel wells.
Max Depth (Front to Back):Required
Enter the limiting usable front-to-back depth with seats in use and the hatch/lid closed. Sedan trunk depth is checked at the top and far sides.
Complex Measurements Shape File Upload:Required for Complex
Required when Complex is selected. Upload a labeled sketch of the shape, with dimensions and views that locate every change in the space.
How Far Should The Port Stick Out From The Front Of The Box To Be Flush With The Back Wall Of The Cabin?Required
Choose how far the port must project from the front face of the box to finish flush at the back wall of the cab. Measure the actual gap and account for the sealing connection.
Minimum Height From Bed To Bottom Of Port:Required
Measure vertically from the same bed-floor datum to the lowest permitted bottom edge of the cab port opening.
Max Height From Bed To Top Of Port:Required
Measure vertically from that same bed-floor datum to the highest permitted top edge. This is an elevation, not the opening height itself.
Max Port Width (Left To Right):Required
Enter the usable left-to-right opening width after allowing for trim, seals, and obstructions.
Design preferences
Lowest FrequencyRequired
Choose the lowest musical frequency you want the design to reproduce, not a tuning frequency. Current options: 15β30 Hz; Default is 25 Hz. If your target falls outside them, contact us before ordering.
Custom RequestsOptional
Include every constraint and preference: clearance already reserved or still needed, seat type, port direction, mounting preferences, windows, and unusual fitment. Repeat relevant details even if discussed previously.
Review your order
Digital Blueprint & Turnaround AcknowledgementRequired
Read and accept the digital-blueprint acknowledgement and the current turnaround time posted at the top of the website.
Physical Fit & Refund AcknowledgementRequired
Read the acknowledgement about requests that cannot fit physically, adjustments, and the stated refund conditions.
Design Constraints & Revision AcknowledgementRequired
Confirm all required constraints are included in this form. Missing information can affect revision eligibility.
T-Line (Transmission Line)
Best suited to: Projects with room for a folded acoustic line and a suitable driver.
A transmission line uses a designed path length, cross-section, termination, and damping. Driver suitability cannot be decided by high Qts or low Fs alone.
Check before ordering: The T-Line product now has a complete order form. Use the walkthrough below; contact us by email if suitability or fit is unclear.
Layout and Measurements
Back means toward the rear of the vehicle; Forward means toward the front; Up means toward the roof. Side means driver or passenger side. Choose your layout, follow the Measurement Guide, and include all fitment constraints.
Product Form Walkthrough
These fields follow the current product form order. Complete the required items and review any option charges on the product page.
Equipment & vehicle
Subwoofer Brand/Model/Version:Required
Enter the exact brand, model, revision, and voice-coil version so we can use the correct specifications.
Subwoofer Size:Required
Choose the actual driver size from the options on this product.
How Many Subwoofers?Required
Choose the number of matching drivers in this enclosure. Any add-on charge is shown in the dropdown.
Vehicle Year/Make/Model:Required
Include year, make, model, trim, and truck cab style where relevant.
Your Wood Sheet Thickness:Required
Choose the actual sheet thickness you will build with. Metric options identify metric blueprints. Follow any field-specific unit instructions and label metric dimensions in your drawing and Custom Requests.
Available space
Measurement ShapeRequired
Choose Rectangular for one limiting height/width/depth; choose Complex for an angled or notched shape that needs multiple dimensions and a labeled drawing. Use the charge shown on this product.
Max Height (Top to Bottom):Required
Enter the limiting usable top-to-bottom dimension. Follow the measurement guide for your build, including window-height limits for a no-wall SUV.
Max Width (Left to Right):Required
Enter the limiting usable left-to-right width. For a rectangular fit, use the narrowest point, often between wheel wells.
Max Depth (Front to Back):Required
Enter the limiting usable front-to-back depth with seats in use and the hatch/lid closed. Sedan trunk depth is checked at the top and far sides.
Complex Measurements Shape File Upload:Required for Complex
Required when Complex is selected. Upload a labeled sketch of the shape, with dimensions and views that locate every change in the space.
Measurement Type (Are you measuring inside a pre-existing shell, or an empty space?)Required
Choose the exact condition: empty external space, internal shell with no front/back panels, or internal shell with its back panel installed. Do not subtract panel thickness twice.
Design preferences
Box Type/Location:Required
Choose the vehicle location and firing directions that match your build. Use Other and explain the layout in Custom Requests if no preset fits.
Lowest FrequencyRequired
Choose the lowest musical frequency you want the design to reproduce, not a tuning frequency. Current options: 20β30 Hz; Default is 25 Hz. If your target falls outside them, contact us before ordering.
Custom RequestsOptional
Include every constraint and preference: clearance already reserved or still needed, seat type, port direction, mounting preferences, windows, and unusual fitment. Repeat relevant details even if discussed previously.
Review your order
Digital Blueprint & Turnaround AcknowledgementRequired
Read and accept the digital-blueprint acknowledgement and the current turnaround time posted at the top of the website.
Physical Fit & Refund AcknowledgementRequired
Read the acknowledgement about requests that cannot fit physically, adjustments, and the stated refund conditions.
Design Constraints & Revision AcknowledgementRequired
Confirm all required constraints are included in this form. Missing information can affect revision eligibility.
Under-Seat Truck Box (Ported)
Best suited to: A ported enclosure beneath a truckβs rear seat while retaining normal seat use.
This product is ported only. Available height, mounting depth, cone clearance, and port space limit the design.
Check before ordering: Measure with the rear seat down. Front and back heights are separate fields; mark humps, brackets, ducts, and seatbelt hardware.
Layout and Measurements
Back means toward the rear of the vehicle; Forward means toward the front; Up means toward the roof. Side means driver or passenger side. Choose your layout, follow the Measurement Guide, and include all fitment constraints.
Product Form Walkthrough
These fields follow the current product form order. Complete the required items and review any option charges on the product page.
Equipment & vehicle
Subwoofer Brand/Model/Version:Required
Enter the exact brand, model, revision, and voice-coil version so we can use the correct specifications.
Subwoofer Size:Required
Choose the actual driver size from the options on this product.
How Many Subwoofers?Required
Choose the number of matching drivers in this enclosure. Any add-on charge is shown in the dropdown.
Vehicle Year/Make/Model:Required
Include year, make, model, trim, and truck cab style where relevant.
Your Wood Sheet Thickness:Required
Choose the actual sheet thickness you will build with. Metric options identify metric blueprints. Follow any field-specific unit instructions and label metric dimensions in your drawing and Custom Requests.
Available space
Max Front Height (Top To Bottom)Required
Measure from the local floor to the underside of the lowered rear seat at the front edge of the under-seat space.
Max Back Height (Top To Bottom)Required
Measure from the local floor to the underside of the lowered rear seat at the rear edge. Do not assume it matches the front height.
Max Width (Left to Right):Required
Enter the limiting usable left-to-right width. For a rectangular fit, use the narrowest point, often between wheel wells.
Max Depth (Front to Back):Required
Enter the limiting usable front-to-back depth with seats in use and the hatch/lid closed. Sedan trunk depth is checked at the top and far sides.
Complex Measurements Drawing Photo(s) Upload (For All Measurements Related To Floor Humps, Brackets, Seatbelts, Etc):Optional
Optional: upload labeled drawings/photos showing every hump, bracket, duct, or seatbelt obstruction. Unlabeled photos cannot replace measurements.
Design preferences
Sub Location:Required
Choose the cone direction: Forward, Downfire, Upfire. Confirm clearance in that direction with the seat down.
Port Location:Required
Choose the outlet direction: Forward, Both Sides, Driver Side, Passenger Side. Keep the outlet and its air path clear.
Lowest FrequencyRequired
Choose the lowest musical frequency you want the design to reproduce, not a tuning frequency. Current options: 20β30 Hz; Default is 25 Hz. If your target falls outside them, contact us before ordering.
Custom RequestsOptional
Include every constraint and preference: clearance already reserved or still needed, seat type, port direction, mounting preferences, windows, and unusual fitment. Repeat relevant details even if discussed previously.
Review your order
Digital Blueprint & Turnaround AcknowledgementRequired
Read and accept the digital-blueprint acknowledgement and the current turnaround time posted at the top of the website.
Physical Fit & Refund AcknowledgementRequired
Read the acknowledgement about requests that cannot fit physically, adjustments, and the stated refund conditions.
Design Constraints & Revision AcknowledgementRequired
Confirm all required constraints are included in this form. Missing information can affect revision eligibility.
Ready to Get Your Custom Blueprint?
Place your order today and receive a precision-engineered subwoofer enclosure design built specifically for your vehicle and subs.