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Many in-stock orders ship within 1-2 business days, but timing varies by item. Custom, built-to-order, oversized, special-order and supplier-direct products may need extra processing time. Free shipping applies to qualifying orders over $99 in the contiguous US. Approved returns may be subject to a restocking fee.
Most products are covered by the manufacturer's warranty against defects. Damage from over-powering or improper installation isn't covered — we'll help coordinate any valid claim.
Tell us your vehicle, subwoofers and electrical setup and our team will help you match the right gear. Reach out before you buy.
Command your bass with precision and peace of mind. The Down4Sound LED Bass Knob combines illuminated style, reliable voltage monitoring, and ultra-precise control in one compact unit.
- Integrated Digital Volt Meter – Monitor system voltage in real-time
- Clickable Potentiometer – Prevents accidental adjustments; stays locked until you turn it
- Smooth, Precise Bass Control – Fine-tune your output instantly
- Rugged Red LED Housing – Glows with a bold D4S hex pattern design
- Easy In-Line Install – RCA pass-through connections for universal fit
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Voltage Range
7V–18V - Rca cable lengths for Input / Output - 14"
Authorized Down4Sound dealer at JS Ultimate Sounds. Free shipping on orders $99+.


