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BasicsCar AudioCar SecurityCruise ControlsDiodesDoor LocksOhm's LawPassive CrossoversRelaysResistorsSubwoofer Enclosures Search
the12volt.com - Free Technical Information for Mobile Electronics Installers
the12volt.com - Free Technical Information for Mobile Electronics Installers
the12volt.com - Free Technical Information for Mobile Electronics Installers
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Diodes
Glossary of Terms
Ohm's Law
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Tools and Equipment
Wire Sizes
Introduction
Parallel & Series Calcs
Passive Crossovers
Port Length Calculators
Subwoofer Box Calculators
Subwoofer Enclosure Types
Subwoofer Wiring Wizard
Thiele - Small Parameters
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Subwoofer Enclosures

Fourth Order Single Reflex Bandpass Enclosure The enclosure is equally as important as the woofer and should be designed for use with the particular woofer you have chosen.

Deciding which enclosure(s) and woofer(s) are best for you can be a task all of it's own, but size constraints of the vehicle, knowledge of Thiele - Small parameters, and understanding the inherent sound characteristics of different enclosure designs will help you decide.

All enclosures should be constructed of at least 5/8'' - 1'' MDF (medium density fiberboard) or material of comparable rigidity or better. Bracing (not shown) should be used throughout the enclosures as needed to prevent any loss of energy due to flexing. For you SPL competitors, I repeat...bracing should be used throughout the enclosures.... Flexing = lost output. With all enclosures, lining the walls with a damping material (fiberglass batting, polyfill, tar based spray, etc.) is recommended to reduce high frequency resonances.

Often the total order of the system is confused with the order of the enclosure. The diagrams shown throughout this section refer only to the order of the enclosure (and are not to scale). The order of the crossover will add to the total order of the system.

There are many types and variations of woofer enclosures. The following information is intended to provide you with a basic understanding of enclosure types and their respective characteristics, design possibilities, and to help you decide which enclosure may work best for you and/or your customers.

Subwoofers, Enclosures, Calculators and Wiring Wizard:
Second Order / Infinite Baffle / Free Air
    Typical Rear Deck Installation/Infinite Baffle/Free
    Back Seat Installation
    Small Deck Installation
Second Order/Acoustic Suspension/Sealed Enclosures
    Sealed
    Isobaric - Sealed
    Isobaric - Sealed (Compound Loading)
    Isobaric - Sealed (Back to Back)
    Isobaric - Sealed (Planar Loading)
Fourth Order / Bass Reflex & Bandpass Enclosures
    Fourth Order / Bass Reflex
    Isobaric - Bass Reflex
    Isobaric - Bass Reflex (Compound Loading)
    Bass Reflex - Passive Radiator
    Isobaric Bass Reflex - Passive Radiator
    Single Reflex - Band Pass
    Isobaric Single Reflex Bandpass
    Three Chamber Single Reflex Bandpass
    Isobaric Three Chamber Single Reflex Bandpass
Sixth Order Enclosures
    Quasi Sixth Order Series-Tuned Bandpass
    Isobaric Quasi Sixth Order Series-Tuned Bandpass
    Dual Reflex Bandpass
    Isobaric Dual Reflex Bandpass
    Three Chamber Dual Reflex Bandpass
    Isobaric Three Chamber Dual Reflex Bandpass
Eighth Order Enclosures
    Quasi Eighth Order Series-Tuned Dual Reflex Bandpass
    Isobaric Quasi Eighth Order Series-Tuned Dual Reflex Bandpass
    Eighth Order Triple Reflex Bandpass
    Isobaric Eighth Order Triple Reflex Bandpass
Subwoofer Enclosures, Port and Wiring Calculators
    Fraction to Decimal Calculator
    Parallel Calculator
    Port Length Calculator
    Series Calculator
    Volume Calculator - Rectangular Enclosures
    Volume Calculator - Wedge Enclosures 1
    Volume Calculator - Wedge Enclosures 2
    Volume Calculator - Cylinder Enclosures
Stereo to Bridged Mono Switched Outputs
Switching from Series to Parallel and Back
Switching from Stereo to Bridged Mono & Series to Parallel
Subwoofer Wiring Wizard and Diagrams
Thiele - Small Parameters

For an in depth resource on building subwoofer enclosures, including formulas, diagrams, projects, and addditional resources, the12volt.com highly recommends you visit Brian Steele's The Subwoofer DIY Page v1.1.

Car Audio:
Glossary of Terms and Definitions
Ohm's Law
Passive Crossovers & Calculators
Metra Application Guides
Power and Ground Cable Sizes
Subwoofer Enclosures & Calculators
Subwoofer Wiring
the12volt's Application Guide
the12volt's Install Bay (forums)
Thiele - Small Parameters
Tools & Equipment

Car Audio Hot Topics:
 How to Set Your Gains
 Running one vc on a dvc sub
 How to wire through a door molex.
 use the application guide
 Fuses or circuit breakers?
 What is a proper sub box?
 How to choose an amplifier.
 Ground Q/A sticky
 Guide: Using WinISD
 Comprehensive front stage setup
 Too Little Power
 How to choose a car CD receiver.
 How to upgrade the Big Three
 How to achieve awesome mid bass
 Fuse size?
 Ohms, using resistors with woofers?
 Advanced front speaker systems how-to
 How to identify stereo wiring.
 What is a proper ground?
  Fiberglass, Fabrication & Interiors:
Fiberglass DVDs
 Tinting Clear Plastic
 How to Make a Fiberglass Enclosure
 Flushing a remote, fun little project
 Fiberglass, Roush Mustang
 Fiberglass shopping list
 How to make circular rings
 Sticky Packing peanut volume measurement

Car Audio Wiring and Relay Diagrams:
American Wire Gauge Sizes
Connecting Additional Devices to Remote Turn Lead
Power and Ground Cable Sizes
Radio On Until Door Opened
Stereo to Bridged Mono Switched Outputs
Subwoofer Wiring Wizard for SVC and DVC Speakers
Switching from Series to Parallel and Back
Switching from Stereo to Bridged Mono & Series to Parallel
Typical Head Unit Wire Harness


Recommended Books, DVDs & Magazines
 (book, DVD, and magazine links open in new window)

Designing, Building, and Testing Your Own Speaker System with Projects Designing, Building, and Testing Your Own Speaker System with Projects
by David B. Weems
Great Sound Stereo Speaker Manual Great Sound Stereo Speaker Manual
by David B. Weems, G. R. Koonce
Master Handbook of Acoustics Master Handbook of Acoustics
by F. Alton Everest
Car Stereo Cookbook Car Stereo Cookbook
by Mark Rumreich
Sound Reinforcement Handbook Sound Reinforcement Handbook
by Gary Davis, Ralph Jones (Contributor)
Introduction to Loudspeaker Design Introduction to Loudspeaker Design
by John L. Murphy
Loudspeaker Design Cookbook Loudspeaker Design Cookbook
by Vance Dickason
Car Stereo Speakers Illustrated Car Stereo Speakers Illustrated
by Daniel Ferguson
More Books, DVDs & Magazines...






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BasicsCar AudioCar SecurityCruise ControlsDiodesDoor LocksOhm's LawPassive CrossoversRelaysResistorsSubwoofer Enclosures Search
the12volt.com - Free Technical Information for Mobile Electronics Installers
the12volt.com - Free Technical Information for Mobile Electronics Installers
the12volt.com - Free Technical Information for Mobile Electronics Installers
Application GuideCalculators, Charts, DiagramsDownloads/ManualsFind InstallersForumsGlossarySubwoofer WiringToolsVehicle Wiring Recent Topics
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