Cadence Pro Car Audio 6.5" 300 Watt RMS 4-Ohm Dual Voice Coil Subwoofer US6D4

• Delivering 300W RMS and 600W peak, this 6.5″ subwoofer brings tight, responsive bass to small or custom installations.
• Wire for 2 or 8 ohms depending on your setup, offering flexibility for single or multi-driver systems.
• Ultra-stiff composite cone and rubber surround deliver clean, distortion-free bass with superior strength.
• Best performance in a 0.35 cu ft tuned enclosure, producing tight, punchy bass ideal for compact builds.
• Stamped steel frame and Aero-style magnet motor with cooling ensure long-lasting performance under pressure.

Cadence Pro Car Audio 6.5" 300 Watt RMS 4-Ohm Dual Voice Coil Subwoofer US6D4

This Listing Includes:

• (1) Cadence US6D4 6.5" Car Subwoofer


• User Manual

Small in size but massive in performance, the Cadence US6D4 from the Ultra Shock Series is built to prove that true bass doesn’t require large space. Designed for clarity, punch, and precision, this 6.5-inch subwoofer delivers powerful, room-filling bass that transforms any car audio system.

Its vibrant orange steel frame and Kevlar-reinforced cone give the US6D4 a bold, professional look that matches its power. The dual 4-ohm voice coils provide flexible wiring options, allowing you to configure the subwoofer for 2-ohm operation when you want to maximize amplifier output or 8-ohm operation for multi-speaker setups that demand balance and control.

Specifications:

• Application Type: Car


• Model Series: US (Ultra Shock)


• Model Number: US6D4


• Size & Type: 6.5" Subwoofer


• Basket: Stamped Steel


• Cone: Kevlar Reinforced Ultra-Stiff Paper Composite


• Surround: High Excursion Natural Rubber


• Magnet: Aero Style Motor with Heat Pump Cooling


• Voice Coil: Dual 4 Ohm Voice Coil

Performance:

• Power Handling: 300W RMS / 600W Peak


• Frequency Response: 50 Hz - 800 Hz


• Sensitivity (SPL @ 1W/1m): 86 dB


• Impedance: Dual 4 Ohm


• Xmax: 6 mm


• FS: 65 Hz


• QTS: 0.48


• VAS: 4.85 L

Installation:

• Mounting Depth: 3.15" (80 mm)

Recommended Enclosures:

• Ideal Sealed Box Volume: 0.15 cu ft (4.25 L)


• Ideal Ported Box Volume: 0.35 cu ft (9.91 L)


• Port Diameter: 2"


• Port Length: 6.78"

Dimensions:

• Length: 10 in (254 mm)


• Width: 10 in (254 mm)


• Height: 7 in (178 mm)


• Weight: 13 lbs (5.9 kg)

Accepted Payment Methods at Big Jeff Audio

At Big Jeff Audio, we strive to make your shopping experience as smooth as possible by offering a wide variety of payment options. Below is a complete list of the payment methods we accept:

Credit and Debit Cards

• Visa
• Mastercard
• American Express
• Discover
• Diners Club

Digital Wallets

• Amazon Pay
• Apple Pay
• Meta Pay (formerly Facebook Pay)
• Google Pay
• Shop Pay
• PayPal

International Payment Methods

• Bancontact
• iDEAL

Bank Transfers

• Zelle

Financing Options

We also offer financing options to make purchasing easier. Learn more about our financing options here.

• Klarna
• Affirm
• Sezzle
• Snap
• Acima
• Tiptop

If you have any questions or need assistance with payments, feel free to reach out to us at info@bigjeffaudio.com or call us at 737-BIG-JEFF.

Shipping Options and Delivery Time

Do You Offer Expedited Shipping?

Yes! At checkout, you can select from different shipping options:

• Standard Shipping: Free for orders over $100.
• Expedited Shipping: Available at an additional cost, calculated based on the weight and destination of your order.

How Long Does Delivery Take?

• Handling Time: Most orders are processed and shipped within 1 business day after receiving cleared payment. Occasionally, additional handling time may be required, but we’ll notify you if that’s the case.
• Standard Shipping: Typically takes 3-5 business days, though delivery may be affected by extreme weather or holidays.

What Happens If My Package Is Undeliverable?

If your package is refused or marked undeliverable and returned to us by the carrier, you’ll need to pay the full shipping cost to have the package resent. Alternatively, we can refund your order, minus the cost of shipping.

Why Can’t I Track My Order?

If you're having trouble tracking your order:

• Make sure you’ve received the shipping confirmation email with the tracking number.
• Log into your account on our website and use the “Check Your Order Status” button.
• If the issue persists, please refer to our detailed guide on tracking your order or contact our customer service team for further assistance.