Sundown Audio U Series 18" 3000W Peak Dual 4 Ohm Voice Coil Subwoofer U-18-D4

• Black Aluminum 3” voice coil former for superior heat dissipation
• High Temperature Round-Wire CCAW voice coil with high-temp black adhesive
• Innovative high-velocity cast aluminum vented frame spacer ring
• Spring loaded terminals accept up to 8 gauge

Sundown Audio U Series 18" 3000W Peak Dual 4 Ohm Voice Coil Subwoofer U-18-D4

This listing includes:

(1) Sundown Audio U Series 18" 1500W RMS, Dual 4 Ohm Subwoofer

Features:

• Black Aluminum 3†voice coil former for superior heat dissipation


• High Temperature Round-Wire CCAW voice coil with high-temp black adhesive


• Double stitched surround


• Heavy duty cast basket


• Spring loaded terminals accept up to 8 gauge


• Stitched-on double-XL tinsel leads


• Rear vented pole piece


• Rear drilled gap-venting


• Innovative high-velocity cast aluminum vented frame spacer ring


• Magnet ID shorting ring


• Top-Plate Cooling Channels


• Cast Aluminum surround bolt-on rings


• Optimized for small ported or bandpass enclosures

Specifications:

• RE (Ohms) 6.1


• FS (Hz) 31.4


• VAS (L) 135.4


• Qes 0.42


• Qms 3.55


• Qts 0.38


• Le (mH) 3.97


• BL (NA) 35.3


• Mms (Grams) 441.3


• Cms (uM/N) 0.06


• Sens (dB @ 1w/1m) 91.8dB

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.