Vendor Catalog

Real specs from the brands that show up in builds. Drop a sub here into the Subwoofer Box calculator and the recommended volumes fill themselves in.

This is a spec reference, not a storefront — to buy, head to JS Ultimate Sounds or grab a member discount code first.

Brand

High-output alternators hand-wound in the USA.

Hand-wound high-output alternators for car audio, offroad, and emergency vehicle use. Real engineering, real warranty, real US support.

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