$125.0 Buy It Now or Best Offer
free,30-Day Returns
Seller Store woofersetc_outlet
(67768) 99.6%,
Location: Los Angeles, California
Ships to: US,
Item: 404493929250
Restocking Fee:20%
Return shipping will be paid by:Seller
All returns accepted:Returns Accepted
Item must be returned within:30 Days
Refund will be given as:Money back or replacement (buyer’s choice)
Enclosure Included:No
Sundown Audio:Sundown Audio
Type:Non-Enclosed Subwoofer
Voice Coil:Dual
Speaker Size:8in.
SD-3 8 D2:SD-3 8 D2
MPN:Sundown Audio SD-3 8 D2
RMS Power:300W
Open Box! SD-3 8 D2 – Sundown Audio 8″ 300W RMS Dual 2-Ohm SD Series SubwooferRetail Price: $269.99 Features & Specifications: The SD-3 series is Sundown’s premier sealed box offering. They started off this design knowing that the majority of sealed box applications today face a depth restriction. Each SD-3 model was designed to have the lowest depth possible while still maintaining a large window of mechanical cushion (about 2” p-p maximum mechanical travel for all models). We do not consider the SD-3 an “ultra-shallow” but they are as shallow as possible and feature several techniques to reduce the effective depth required As mentioned above; the SD-3 series effectively requires less depth than other woofers that are more physically shallow. First, they have a completely solid pole and thus require no room for air venting behind the motor. This allows the motor to be completely flush against the back wall of the enclosure. Secondly the entire SD-3 series features an inverted rubber surround – this reduces the space required in front of the woofer to about 1” total (we suggest 1.25-1.5” when possible for the best sound). So, despite not being an “ultra-shallow” woofer they have an effective total depth requirement of about 2” less than most traditional woofers of an equal depth. The SD-3 series truly is a world-class sound quality woofer with low mounting depth, small box requirements, and a reasonable price. This line features an under-hung motor topology – this means that the voice coil is shorter than the top plate so the amount of winding in the gap doesn’t change at all over the center portion of stroke – in this case featuring a 1” thick top plate and 1/2” long 8-layer copper voice coil. This allows for 0.57″ (14.5mm) linear excursion one-way while maintaining an extremely flat BL curve. The large inverted rubber surround & high-stroke spider also allow for a very even compliance curve over the full range allowed by the SD-3 series. To further reduce distortion a large Magnet ID faraday ring has also been included Sundows borrowed some technology from their large high-excursion woofers and incorporated a hyper-extended pole-piece into the SD-3 line. This helps to prevent voice coil rocking & related damages at high levels of stroke – since the SD-3 has such a soft suspension and shallow depth it would be more prone to this without the hyper-extended pole. But, thanks to Sundown’s extensive experience in building high-stroke subwoofers they were able to incorporate the ideal solution. Product Features:Sundown Audio SD-3 8 D2 8″ 300W RMS Dual 2-Ohm SD Series SubwooferPower Handling:RMS Power = 300-wattsVoice Coil Configuration: Dual 2-OhmXmax = TBAUnder-Hung low distortion motor topologySolid pole piece with chamfered edgesBlack Aluminum 2.5” voice coil former for superior heat dissipationHigh Temperature 8-Layer copper voice coil wireLarge aluminum faraday ring (Magnet ID)Spring Loaded TerminalsStitched-On Tinsel Lead WiresOptimized for small sealed enclosures 0.25-0.33 cubes sealedInverted Rubber Surround to reduce front-mount depthHigh strength cast aluminum framesDC Resistance (Re): 4.0 ΩResonance Frequency (Fs): 49.1 HzEquivalent Volume (Vas): 6.6 LElectrical Q Factor (Qes): 0.63Mechanical Q Factor (Qms): 4.39Total Q Factor (Qts): 0.55Force Factor (BL): 12.4 NAMoving Mass (incl. Air Load) (Mms): 79.0 gSuspension Compliance (Cms): 0.13 mm/NSensitivity: 82.8 dB 1w / 1mBox Recommendations:Sealed: 0.4 cu. ft.Ported: N/A Displacement: 0.10 cu. ft.Depth: 4.75 inOutside Diameter: 8.375 inCutout Diameter: 7.375 inRecommended Tuning: 32 HzRecommended Port Area: 8 – 12 sq. in International Shipping: Free shipping DOES NOT APPLY to Puerto Rico, Hawaii, Guam, Alaska or any country outside of the United States.Please message us for shipping quotes. Import duties, taxes and charges are not included in the item price or shipping charges. These charges are the buyer’s responsibility. Please check with your country’s customs office to determine what these additional costs will be prior to bidding/buying. These charges are normally collected by the delivering freight (shipping) company or when you pick the item up – do not confuse them for additional shipping charges. Warranty: Protect Your Product With a Consumer Priority Service Warranty
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