🚗 Car Audio
Subs, amps, wiring & SPL
Subwoofer Box Designer
Sealed, ported, T-line, or bandpass — pick your geometry and get net volume, port length, and tuning.
Open →Ohm’s Law
Solve any two of V, I, R, P for the other two.
Open →Speaker Wiring & Impedance
Compute the final amp-facing load for multi-driver setups.
Open →SVC Wiring (Multi-Amp)
Detailed Single Voice Coil wiring for multi-amp arrays. Shows every valid configuration.
Open →DVC Wiring (Multi-Amp)
Detailed Dual Voice Coil wiring — every valid coils × subs configuration with final impedance.
Open →QVC Wiring (Multi-Amp)
Detailed Quad Voice Coil wiring (4 coils per sub) — every valid configuration with final impedance.
Open →Amplifier Power
Output voltage, current draw, wire gauge, and fuse size.
Open →Port / Vent Length
Given a target tuning and box volume, returns the port length needed.
Open →SPL / dB
Estimate SPL from speaker sensitivity, power, and distance.
Open →Wire Gauge & Current
Pick the right AWG from total watts, voltage, and run length.
Open →Capacitor Sizing
Recommended farads — and when a battery upgrade is the better fix.
Open →