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Crystal Audio Solutions Knowledge Center

Car Audio Calculators, Build Guides, and Electrical Planning Tools

Use these CAS tools before you order parts. Estimate amp draw, alternator needs, final ohm load, cone area, enclosure volume, wire/fuse range, and amplifier gain target voltage.

AlternatorsCharging support for loud builds SubwoofersMatch cone area and power AmplifiersPlan gain and current draw WireOFC, CCA, fuses, Big 3 kits

Build Calculators

Pick a tool, enter your numbers, and use the result as a planning starting point.

Amplifier Gain Target Calculator

Find the target AC voltage for setting gain with a multimeter. Formula: square root of watts times ohms.

Enter RMS watts and final ohm load.

Use a clean test tone. Turn off bass boost. Be careful with EQ overlap and clipping.

Amplifier Current Draw Calculator

Estimate how many amps your amplifier may demand from your charging system.

Enter RMS watts to estimate current draw.

Alternator Size Estimator

Estimate alternator capacity after audio current, vehicle load, and headroom are included.

Enter audio current draw to estimate alternator size.

Subwoofer Wiring Calculator

Estimate final impedance for common subwoofer wiring combinations.

Choose your setup to estimate final impedance.

Subwoofer Cone Area Calculator

Compare total cone area between different subwoofer setups.

Choose a subwoofer setup to estimate total cone area.

Box Volume Helper

Estimate rough internal airspace before subwoofer, bracing, and port displacement.

Enter outside dimensions to estimate internal volume.

Fuse and Wire Planning Helper

Get a rough starting point for main power wire and fuse planning.

Enter estimated current draw to get a planning range.

Knowledge Center Guides

Start with electrical support, then match the rest of the system around the power it actually needs.

High Output Alternators

Learn when you need one, how to size it, and why batteries alone are not always the fix.

Read the alternator guide

Amp Draw and Voltage Drop

Estimate current demand before your amp goes into protect or your lights start dimming.

Read the amp draw guide

Need a Build Check?

Send CAS your vehicle, amplifier, subwoofers, enclosure goals, and current electrical setup.

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