- 1250W RMS / 2500W Peak Power Handling for extreme output in compact builds
- Dual 4-Ohm voice coils for flexible wiring configurations
- Triple-stacked motor with aluminum shorting ring for reduced distortion
- FEA-optimized suspension with ~19mm linear Xmax
- Designed for sealed, ported, and 4th order enclosures
Sundown Audio X Series V.4 8" 1250W RMS Dual 4-Ohm Subwoofer (X-8 V.4 D4)
This listing includes:
- (1) Sundown Audio X Series V.4 8" Dual 4-Ohm Subwoofer
The Sundown Audio X-8 V.4 D4 is the king of standard cutout 8-inch subwoofers, setting the benchmark for extreme output, control, and durability in compact high-power bass systems. Rated at 1250 watts RMS and 2500 watts peak, this subwoofer is engineered for serious performance where space is limited but output demands are not.
Building on the legacy of the X-8 v1, v2, and v3, the V.4 introduces a meticulously FEA-optimized spider and surround system, dramatically improving linearity, control, and usable excursion. The result is a subwoofer capable of approximately 19mm of linear one-way Xmax and over 2.4 inches peak-to-peak before the voice coil exits the gap.
At its core is a massive triple-stacked motor assembly, a 2.5-inch high-temperature voice coil, and a hyper-extended pole design that maximizes magnetic efficiency and power handling. An integrated aluminum magnet ID shorting ring reduces inductive distortion for cleaner, tighter bass at extreme output levels.
Designed for sealed, ported, and 4th order enclosures, the X-8 V.4 D4 delivers unmatched performance in its class and is ideal for high-end SPL builds and aggressive daily systems alike.
Specifications – X Series V.4 8" Dual 4-Ohm
- RMS Power Handling: 1250W
- Peak Power Handling: 2500W
- Nominal Impedance: Dual 4 Ohm
- DC Resistance (Re): 6.0 Ohm
- Voice Coil Diameter: 2.5"
- Sensitivity (1W/1m): 79.8 dB
- Xmax (One-Way): 19mm
Thiele & Small Parameters
- Fs: 44.150 Hz
- Vas: 3.562 L
- Qes: 0.497
- Qms: 2.30
- Qts: 0.409
- BL: 27.141 NA
- Mms: 220.09 g
- Cms: 59.044 um/N
Enclosure Recommendations
Sealed Enclosure
- Volume: 0.30 – 0.40 cu ft
Ported Enclosure
- Volume: 0.75 – 1.0 cu ft
- Recommended Tuning: 32 Hz
- Recommended Port Area: 12 – 16 sq in
4th Order Enclosure
- Sealed Side: 0.20 cu ft
- Ported Side: 0.80 cu ft
- Port Area: 16 sq in
- Port Length: 8"
Dimensions
- Outside Diameter: 8.71"
- Cutout Diameter: 7.32"
- Mounting Depth: 7.56"
- Motor Diameter: 6.88"
- Driver Displacement: 0.13 cu ft
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
Bank Transfers
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.
