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Capacitor Sizing
Recommended farads — and when a battery upgrade is the better fix.
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From the Catalog
Real products with verified specs. Tap one for the full data sheet.
Gear for this build
In stock at our partner shops — real prices, shipped from people who run this stuff.
Sundown Audio
Sundown SA150-975L Super-Cap Battery
What a capacitor pretends to do — real stored energy for voltage sag.
$299.99JS Ultimate Sounds
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Stealth Energy
American Bass Stealth ST-750 75Ah AGM
75Ah AGM — deep reserve for high-draw audio and dual-battery setups.
$434.28JS Ultimate Sounds
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Orion Car Audio
Orion CEA1600.1D 1600W RMS Mono
1600W RMS Cobalt Elite monoblock — real power per dollar.
$239.95JS Ultimate Sounds
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American Bass
American Bass Digital Voltage Monitor
See the sag before it costs you an amp — real-time 12V readout.
$17.95JS Ultimate Sounds
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JS Ultimate Sounds and JS Alternators are run by the ShowUp team — buying there supports the site. Prices as listed at the shop.