More Watts or More Subs? What Actually Adds Decibels in Car Audio
Why doubling amplifier power only adds 3 dB, how a second subwoofer can add up to 6 dB, and how sensitivity and the box compare, with an SPL gain calculator.
Paul Galanos |
Volume I: All The Formulas & The Science – Tagged "Volume I"
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How Long Can You Play With the Engine Off? Amp-Hours, Watt-Hours and Reserve
Estimate engine-off listening with usable reserve and measured average draw, without mistaking battery capacity for a guaranteed restart or runtime.
12 Volt Outlet |
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How Accurate Is Your Car-Audio Math? Measurement Error and False Precision
Learn why calculator digits are not measurement accuracy, with original voltage-to-power examples and a practical way to report honest test results.
12 Volt Outlet |
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Subwoofer Box Science: Calculating Sealed Volume, Port Area & Tuning Frequency
A subwoofer enclosure is an acoustic system, not empty furniture. Air volume acts like a spring, a port acts like a resonant mass, and every driver, brace and vent changes...
Paul Galanos |
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Thiele/Small Parameters Explained: How to Read Subwoofer Specifications
Thiele/Small parameters are not a scoreboard. They are a connected set of measurements used to model how a low-frequency driver behaves—especially near resonance and inside an enclosure.
Paul Galanos |
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Crossovers Explained: Frequencies, Slopes, Filter Types & Safe Tuning
A crossover is both a handoff and a guardrail. It assigns frequencies to the drivers built to reproduce them, reduces wasted excursion and shapes how adjacent speakers blend through the...
Paul Galanos |
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Frequency, Wavelength, Phase & Cancellation in a Vehicle
When bass disappears in one seat but pounds in another, the amplifier may be fine. Sound waves are arriving with different timing and phase, interacting with the cabin and each...
Paul Galanos |
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The Decibel Explained: How Amplifier Power, Speaker Sensitivity & Distance Affect Loudness
The decibel is the language of level change. Once you understand its logarithmic scale, speaker sensitivity and distance, you can stop expecting miracles from small wattage increases and start finding...
Paul Galanos |
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How Much Electrical Power Does Your Car Audio System Really Need?
The biggest amplifier rating is not the number your alternator sees. Electrical planning starts with real output, efficiency and vehicle voltage, then accounts for the car's own demands and how...
Paul Galanos |
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Voltage Drop in Car Audio: Wire Resistance, Grounding & the Big 3 Upgrade
A system can have a healthy alternator and still starve the amplifier through bad wire, weak crimps or a poor ground. Voltage-drop testing finds the loss while it is happening—and...
Paul Galanos |
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How to Set Amplifier Gain Correctly Using a Multimeter, Oscilloscope or Distortion Detector
Gain is input-sensitivity matching—not a volume knob and not a horsepower dial. Set it correctly and the system reaches clean output predictably; set it blindly and clipping can destroy speakers...
Paul Galanos |
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Series vs. Parallel Speaker Wiring: How to Calculate the Final Ohm Load
The voice coils you buy determine the loads you can build. Learn the math before you connect the wire and you can prevent protect mode, overheating and expensive amplifier damage.
Paul Galanos |
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Car Audio Power Calculations: Watts, Volts, Amps & RMS Explained
Power ratings are only useful when you know what was measured, at what impedance, at what voltage and for how long. This guide turns watts, volts and amps into numbers...
Paul Galanos |
