Best in 7 days
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Ships within 48 hours · Estimated delivery Sep 12 - Sep 17
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Description
Black Diamond 12" Subwoofer 1200 Watts Dual 4 Ohm Car Audio DIA-R12D4 SingleBlack Diamond 12" Subwoofer with Dual 4 Ohm VC DIA R12D4 This sleek DIA R12D4 delivers an impressive 1200 Watts Max Power with 600 Watts RMS at Dual 4+4 Ohm. Once you hear it, you will finally realize what big, rich bass sounds like. Dual Voice Coil provides multiple options and flexibility to wire Parallel, Series, or Independent. Settle for nothing but the best with Ferrite magnets that produce a wider range of tones and can handle tremendous power
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.1 ★★★★★
Based on 1143 reviews
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Product Reviews
★★★★★ 5
FITS 2006 CIVIC
Fits 2006 Civic and running good so far.
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Reviewed in the United States on February 7, 2026
★★★★★ 5
Reliable oil for BMW owners
I drive a BMW, and this is the oil I always keep with me in the car. I even have a special holder made for this exact bottle, because it fits perfectly and I trust it that much. The oil quality is excellent, and since it’s fully synthetic, it performs well even during long drives and temperature changes.
In terms of functionality, the engine runs smoothly and quietly after each change. Longevity is also great. I notice that the oil keeps its properties for the full interval, so I don’t have to top it up too often. There’s also no oil leakage from the bottle, which is important when you store it in the trunk.
For a branded BMW product, I think the value for money is good, especially if you service your car yourself or like to have backup oil on hand. Overall, a dependable synthetic oil for anyone who wants to use what the car was designed for.
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Reviewed in the United States on November 2, 2025
★★★★★ 5
Great product
Great
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Reviewed in the United States on February 18, 2026
★★★★★ 5
Right oil for my bmw
It has worked great for me for the BMW X5. The price is great. I am purchasing these for a few years now I know every Bmw needs to have one Handy in the car just in case the signal comes to add more oil. I am very happy with this product.
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Reviewed in the United States on April 1, 2026
★★★★★ 5
Great product
Works as stated
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Reviewed in the United States on November 28, 2025
