Infinite-Baffle Subwoofers: When the Trunk Becomes Part of the Design
Understand trunk infinite-baffle subwoofers: front-to-rear separation, suitable drivers, seating changes, safe mounting and verification.
12 Volt Outlet |
Volume IX: Woofer Enclosure Sorcery
Infinite-Baffle Subwoofers: When the Trunk Becomes Part of the Design
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Passive-Radiator Subwoofer Boxes: Deep Bass Without a Long Port
Learn how passive radiators tune a subwoofer enclosure, why added mass and travel matter, and what to verify before applying power.
12 Volt Outlet |
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Choosing Wood for a Subwoofer Box: MDF, Plywood Cores, Density and Real Thickness
A practical guide to MDF, birch and mixed-core plywood, 3/4-inch versus 21/32-inch thickness, panel flex, voids, bracing and better enclosure joints.
Paul Galanos |
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Polyfill in Subwoofer Boxes: The Science, Quantity, Pillow Question and When Not to Use It
Fiberfill is not imaginary air and not bass fertilizer. It changes how acoustic energy and heat move inside a cabinet. In a suitable sealed enclosure it can lower Q and...
Paul Galanos |
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Subwoofer Box Construction: MDF vs. Birch, Bracing, Fasteners, Glue and Builder Tricks
A strong enclosure is airtight, dimensionally accurate and stiff enough that intended radiators dominate. Material branding alone cannot provide that. Panel span, thickness, elastic modulus, joints, braces and pressure determine...
Paul Galanos |
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Slot Ports vs. Aeroports: Tuning Accuracy, Airflow, Flares and Sound
A slot port and a round port obey the same basic resonator physics. Shape changes perimeter, boundary loss, packaging, termination and fabrication—not the existence of a separate kind of bass....
Paul Galanos |
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Aperiodic Bi-Chamber (ABC) Enclosures: The Rare Coupled-Cavity Subwoofer Box
ABC is one of those labels whose shop usage is not perfectly standardized. The commonly intended design uses two coupled air volumes and more than one opening so the driver...
Paul Galanos |
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Horn-Loaded Subwoofer Enclosures: Front, Rear, Folded and Tapped Horns
A horn is an acoustic transformer. It couples a relatively small, high-pressure driver motion to a progressively larger air load. The reward can be exceptional sensitivity and reduced cone travel...
Paul Galanos |
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Transmission-Line Subwoofer Enclosures: Quarter-Wave Design, Folding, Stuffing and Real Applications
A transmission line routes the cone's rear radiation through a long duct so its delayed output can reinforce useful bass while damping unwanted energy. Real designs sit on a spectrum...
Paul Galanos |
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Bandpass Enclosures Explained: 4th-, 6th- and 8th-Order, Series and Parallel Tuned
THE 12 VOLT ENCYCLOPEDIA · VOLUME IX Bandpass Enclosures Explained: 4th-, 6th- and 8th-Order, Series and Parallel Tuned A bandpass enclosure hides the cone and makes one or more...
Paul Galanos |
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Ported Bass-Reflex Enclosures: Tuning, Port Area, Flares, Bends and Effective Length
A bass-reflex system is two radiators coupled through one air volume: the woofer cone and the port. Near tuning, the moving plug of air in the port supplies much of...
Paul Galanos |
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Sealed Subwoofer Enclosures: Qtc, Air Spring, Volume and Real Tuning
A sealed enclosure looks simple because it has no port. That simplicity is valuable, but it does not eliminate alignment choices. Volume changes the air spring, system resonance, damping, efficiency,...
Paul Galanos |
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Loudspeaker Enclosure History & Cabinet Science: From Open Baffles to Modern Car Audio
A woofer cabinet is not furniture surrounding a speaker. It is half of the acoustic machine. It controls what the cone's rear wave can do, changes the mechanical load on...
Paul Galanos |
