About Us
About JS Ultimate Sounds
JS Ultimate Sounds is a car, marine, and powersports audio retailer based in Greer, South Carolina. We're the car-audio sister company of JS Alternators (js-alternators.com) — a family-owned business designing and building high-output alternators since 2013. What began with a passion for loud, clean car audio and reliable charging systems has grown into a team that serves customers nationwide from our own warehouse.
Our Team & Expertise
We're real car-audio enthusiasts, not a faceless storefront. Our team lives and breathes subwoofers, amplifiers, speakers, enclosures, batteries, and the electrical that powers them. The same experienced crew behind JS Alternators' charging systems helps you match the right gear to your build — from daily drivers to SPL competition.
Sister Company: JS Alternators
JS Ultimate Sounds and JS Alternators are sister companies — owned and operated by the same family team and shipping from the same Greer, SC warehouse. Together we cover both sides of a serious system: the audio equipment and the high-output electrical to run it. Learn more at js-alternators.com.
Genuine Products & Warranty Support
We sell brand-new, genuine car audio products through established supplier and distributor relationships. Manufacturer warranty coverage varies by brand and product; when a product is eligible for manufacturer warranty support, our team helps coordinate valid warranty claims. We do not sell gray-market, refurbished, or counterfeit products.
Contact
JS Ultimate Sounds · 146 W. Phillips Rd. Suite H, Greer, SC 29650
Phone: 864-479-4340 · Email: contact@jsultimatesounds.com