XS Power SB430-16 430F SuperBank Ultracapacitor
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 within the contiguous US. Freight items may require delivery coordination; any shipping exceptions are shown before checkout. 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.
Compact and competition-proven, the XS Power SB430-16 packs serious ultracapacitor technology into a Group 34-sized enclosure, making it the ideal power cap upgrade for builds where space rules out a full Group 31 bank. This farad capacitor bank charges and discharges with the speed of a true ultracapacitor, responding to amplifier demands faster than any battery technology can.
Voltage Stabilization That Fits Your Build
Headlight dimming and voltage dips during heavy bass hits are symptoms of a system that has outpaced its power supply — the SB430-16 addresses that directly by acting as a high current capacitor buffer between your battery and your amplifiers. Whether you are fine-tuning a daily driver or sharpening the transient response of a competition SPL system, this sealed car audio capacitor brings measurable stability without the bulk of larger ultracapacitor banks.
Specifications
| Battery Type | Ultracapacitor |
| BCI Group Size | Group 34 |
| Volts | 18.9 |
| Included Hardware | M6 Hardware Included |
| Warranty | 1 Year — view warranty (PDF) |
| Instructions | Download instructions (PDF) |
| Farads | 430 |
| Max Power Rating | 4000 Watts |
| Operating Temperature | -40F-149F |
| Watt Hours (Wh) | 21.2Wh |
| Length (Inches) | 10.24 |
| Width (Inches) | 6.75 |
| Height (Inches) | 7.2 |
| Weight (lbs) | 17 |
| Weight (kg) | 7.7 |
PROP 65 WARNING: This product can expose you to chemicals including lead and lead compounds, which are known to the State of California to cause cancer or birth defects or other reproductive harm. Wash hands after handling.
For more information, visit www.P65Warnings.ca.gov
