- 1250W RMS high output performance: built for serious bass from a compact 8 inch subwoofer with competition-level capability
- 19mm xmax high excursion design: delivers deep, low-frequency extension with over 2.4 inches peak-to-peak movement
- Dual 4 ohm voice coil configuration: flexible wiring options for maximizing amplifier efficiency and system power
- triple-stacked motor with 2.5 inch coil: increases motor force, thermal stability, and overall output under heavy load
- fea-optimized suspension and mega-roll surround: improves control, durability, and low distortion at high excursion levels
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 Series V.4 8-inch subwoofer proves that small doesn’t mean weak. Built for serious output in tight spaces, this sub delivers 1250 watts RMS of clean, controlled power with the kind of low-end extension most 8-inch drivers can’t touch.
The redesigned V.4 platform brings improved suspension geometry, better cooling, and stronger motor force to keep performance consistent under heavy load. With 19mm of linear excursion and over 2.4 inches of peak-to-peak movement, it moves more air than you’d expect from its size, hitting deep while staying tight and responsive.
A triple-stacked motor and 2.5-inch high-temperature voice coil provide the backbone for high output and long-term durability. The integrated shorting ring helps reduce distortion, keeping bass clean even when pushed hard.
Whether you’re building a compact daily system or a space-limited SPL setup, the X-8 V.4 delivers serious bass performance without needing a huge enclosure. It works well in sealed, ported, or 4th-order designs, giving you flexibility to build it your way.
If you want real bass from a small footprint, this is where it starts.
NOTICE ON PACKAGING:
Sundown Audio has updated subwoofer power ratings to reflect true real-world performance. Some packaging may show previous ratings. Performance fully aligns with the current published specifications.
Features
- 1250W rms high output
- 2500W peak power handling
- dual 4 ohm voice coil
- 19mm xmax high excursion
- triple-stacked motor design
- 2.5-inch high-temp voice coil
- fea optimized suspension
- low distortion performance
- compact high-output design
- works in sealed and ported boxes
Specifications
- 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.
