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About: Sundown Audio U-6.5 U-Series 6.5" 400W RMS Car Subwoofer
Perfect for high-power underseat enclosures and designed to be at home in the competition lanes or playing your favorite tunes, the U Series is the premier “standard suspension” woofer in the Sundown lineup. A double-stacked 9” wide ferrite magnet system is coupled to a thick top plate. A thick set of shorting rings are also used inside the magnets and on the pole cap, smoothing out frequency response while doubling as a heat sink and airflow guide. An all-new, substantially thicker custom aluminum frame was designed specifically for the U Series, and equipped with heat-dissipation ribs. The v.2 motor also features an extended pole piece to keep the coil controlled under high stress!
Specifications:
Enclosure Specifications:
| Thiele-Small Parameters | U-6.5SW" D2 | U-6.5SW" D4 |
|---|---|---|
| Dc Resistance (Re) | 4.0586 Ohms | 6.6274 Ohms |
| Resonance Frequency (Fs) | 41.9533 Hz | 38.6925 Hz |
| Equivalent Volume (Vas) | 2.9053 L | 3.7701 L |
| Electrical Factor (Qes) | 0.5238 | 0.5005 |
| Mechanical Factor (Qms) | 8.5834 | 7.2470 |
| Total Factor (Qts) | 0.4937 | 0.4681 |
| Inductance (Le) | 4.0112 mH | 5.5892 mH |
| Bl Factor (BL) | 16.7428 | 20.0082 |
| Mechanical Mass (Mms) | 137.2546 g | 124.3518 g |
| Mechanical Compliance (Cms) | 104.8528 uM/N | 136.0613 uM/N |
| Sens (dB @ 1w/1m) | 77.8706 | 78.1460 |
You may return most new, unopened items within 30 days of delivery for a refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect item).
You should expect to receive your refund within two-three weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
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