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Overview

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.

Sundown Audio U-6.5 U-Series 6.5" 400W RMS Car Subwoofer- Dual 2 Ohm

Model: U-6.5 D2
Web Code: 19396735
Sold and shipped by | 4.4 seller rating (157 reviews)

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Warranty

Check with the manufacturer for details.

For Quebec residents: See the Availability Guarantee disclosure in the Specifications section below.

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:

RMS 400 watts

Dual 2 or 4 ohm voice coils

Optimized for small ported enclosures

Aluminum 1.75” voice coil former for superior heat dissipation

High-temperature copper voice coil

Double stitched surround

Heavy-duty cast basket

Spring-loaded terminals accept up to 8-gauge wire

Stitched-on heavy-duty tinsel leads

Solid pole with vent channels and aluminum shorting ring cap

Rear gap-venting

Top-Plate Cooling Channels

Enclosure Specifications:

Sealed Enclosure: 0.125-0.2 cu. ft. net

Ported Enclosure: 0.25-0.35 cu. ft. net

Recommended Tuning: 35Hz -40Hz

Recommended Port Area: 4-5 sq. in

Displacement: 0.04 cu. ft.

Depth: 5.71"

Outside Diameter: 7.17"

Cutout: 5.94"

Thiele-Small ParametersU-6.5SW" D2U-6.5SW" D4

Dc Resistance (Re)4.0586 Ohms6.6274 Ohms

Resonance Frequency (Fs) 41.9533 Hz38.6925 Hz

Equivalent Volume (Vas) 2.9053 L3.7701 L

Electrical Factor (Qes)0.52380.5005

Mechanical Factor (Qms)8.58347.2470

Total Factor (Qts)0.49370.4681

Inductance (Le)4.0112 mH5.5892 mH

Bl Factor (BL)16.742820.0082

Mechanical Mass (Mms)137.2546 g124.3518 g

Mechanical Compliance (Cms)104.8528 uM/N136.0613 uM/N

Sens (dB @ 1w/1m)77.870678.1460

Product Condition
Brand New

For Quebec residents – Disclosure under the Consumer Protection Act

In compliance with Bill 29, Best Buy and third-party sellers on Best Buy Marketplace do not guarantee the availability of replacement parts, repair services, or maintenance information for any products. Coverage provided through any Best Buy Protection programs and applicable manufacturer warranties, if any, remain in place. Please contact the manufacturer directly for information about their availability guarantee.

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