$287.09 Buy It Now or Best Offer
free,30-Day Returns
Seller Store alternatoroutletcom
(290) 98.0%,
Location: Massena, New York
Ships to: US,
Item: 195870616745
All returns accepted:ReturnsNotAccepted
Sundown Audio:Sundown Audio
Voice Coil:Dual
Speaker Size:8in.
SDA-SD-48:SDA-SD-48
MPN:SDA-SD-48
Warranty (Open Box Items):NO warranty by the manufacturer
Sundown Audio – SD-4 Sealed Box Subwoofer 8″ Dual 2 Ohm (Open Box) Sundown Audio – SD-4 Sealed Box Subwoofer 8″ D2/D4 The SD-4 series is our premier sealed box offering & is the successor to the SD-3. We started off this design knowing that the majority of sealed box applications today face a depth restriction so each SD-4 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-4 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-4 series effectively requires less depth than other woofers that are more physically shallow. First of all they lack a pole vent, 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. To allow for efficient air-cooling we added vent channels on the OD of the pole and side-firing gap venting. Secondly the entire SD-4 series features an all-new foam “W” shape surround – this reduces the space required in front of the woofer gasket to about 1” total. 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 fourth generation series also upgrades to NEO motors to reduce angled depth requirements substantially versus the SD-3 series! The SD-4 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 ½” long 8-layer copper voice coil. This allows for 14.5mm linear excursion one-way while maintaining an extremely flat BL curve. The all new “W” surround design and newly tooled spider work together to create a flat “center” compliance curve which quickly turns progressively stiffer past the linear limits of the motor. This was heavily optimized in 3D computer simulations. This makes the SD-4 significantly more mechanically rugged than the previous generation. To top off distortion reduction features the SD-4 features a shorting ring around the bottom of the pole-piece to even out the LE curve. Available in Dual 2 or Dual 4 Ohm Voice Coils Features Xmax = 14.5mm one-way by 70% BL RMS Power = 600-watts (400-watts for the 8” model) Under-Hung low distortion motor topology Solid pole piece with chamfered edges Black Aluminum 2.5” voice coil former for superior heat dissipation (2” for 8” model) High Temperature 8-Layer copper voice coil wire Large aluminum faraday ring (Pole Base OD) Spring Loaded Terminals Stitched-On Tinsel Lead Wires Optimized for small sealed enclosures Computer Optimized Foam “W” Surround High strength cast aluminum frames (8” model features US Patent D691595) Specifications SD-4 8″ T/S SPECSSD-4 8″ D2SD-4 8″ D4 RE (Ohms) 4.2018 6.4276 FS (Hz) 35.6841 36.2549 VAS (L) 12.1640 12.8320 Qes 0.5783 0.6561 Qms 5.7988 5.7301 Qts 0.5259 0.5887 Le (mH) 4.4242 6.0746 BL (NA) 13.1700 14.7716 Mms (Grams) 106.4747 97.7789 Cms (uM/N) 186.8295 197.0082 Sens (dB @ 1w/1m) 81.5509 81.4416 Enclosure Specifications SD-4 8″ Sealed Enclosure 0.33-0.5 cu ft Ported Enclosure Not Recommended Recommended Tuning N/A Recommended Port Area N/A Displacement 0.07 cu ft Depth 4.6″ Outside Diameter 8.70″ Cut-Out 7.30″ Physical Dimensions Download Enclosure Designs coming soon… Sundown Audio – SD-4 Sealed Box Subwoofer 8″ Dual 2 Ohm (Open Box) Sundown Audio – SD-4 Sealed Box Subwoofer 8″ D2/D4 The SD-4 series is our premier sealed box offering & is the successor to the SD-3. We started off this design knowing that the majority of sealed box applications today face a depth restriction so each SD-4 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-4 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-4 series effectively requires less depth than other woofers that are more physically shallow. First of all they lack a pole vent, 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. To allow for efficient air-cooling we added vent channels on the OD of the pole and side-firing gap venting. Secondly the entire SD-4 series features an all-new foam “W” shape surround – this reduces the space required in front of the woofer gasket to about 1” total. 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 fourth generation series also upgrades to NEO motors to reduce angled depth requirements substantially versus the SD-3 series! The SD-4 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 ½” long 8-layer copper voice coil. This allows for 14.5mm linear excursion one-way while maintaining an extremely flat BL curve. The all new “W” surround design and newly tooled spider work together to create a flat “center” compliance curve which quickly turns progressively stiffer past the linear limits of the motor. This was heavily optimized in 3D computer simulations. This makes the SD-4 significantly more mechanically rugged than the previous generation. To top off distortion reduction features the SD-4 features a shorting ring around the bottom of the pole-piece to even out the LE curve. Available in Dual 2 or Dual 4 Ohm Voice Coils Features Xmax = 14.5mm one-way by 70% BL RMS Power = 600-watts (400-watts for the 8” model) Under-Hung low distortion motor topology Solid pole piece with chamfered edges Black Aluminum 2.5” voice coil former for superior heat dissipation (2” for 8” model) High Temperature 8-Layer copper voice coil wire Large aluminum faraday ring (Pole Base OD) Spring Loaded Terminals Stitched-On Tinsel Lead Wires Optimized for small sealed enclosures Computer Optimized Foam “W” Surround High strength cast aluminum frames (8” model features US Patent D691595) Specifications SD-4 8″ T/S SPECSSD-4 8″ D2SD-4 8″ D4 RE (Ohms) 4.2018 6.4276 FS (Hz) 35.6841 36.2549 VAS (L) 12.1640 12.8320 Qes 0.5783 0.6561 Qms 5.7988 5.7301 Qts 0.5259 0.5887 Le (mH) 4.4242 6.0746 BL (NA) 13.1700 14.7716 Mms (Grams) 106.4747 97.7789 Cms (uM/N) 186.8295 197.0082 Sens (dB @ 1w/1m) 81.5509 81.4416 Enclosure Specifications SD-4 8″ Sealed Enclosure 0.33-0.5 cu ft Ported Enclosure Not Recommended Recommended Tuning N/A Recommended Port Area N/A Displacement 0.07 cu ft Depth 4.6″ Outside Diameter 8.70″ Cut-Out 7.30″ Physical Dimensions Download Enclosure Designs coming soon… × × × × × × × Buy now and save! Shipping info Click the Shipping & Payments tab above the listing description for more info FREE Shipping Click the Shipping & Payments tab above the listing description for more info! Additional delivery notes PICK UP OPTION Sorry, our items are NOT available for pick-up. PAYMENT Immediate payment is required upon selecting “Buy It Now” or upon checking out through the cart. We accept payment via U.S. PayPal accounts and all Major Credit Cards, Debit Cards & Google Pay. We are legally required to collect sales tax in those states and localities where we maintain a physical presence (nexus). The applicable amount of sales tax charged to an order will be calculated based on the shipment destination’s state and local sales tax laws. Thank you for shopping with us on eBay! Additional Information No additional information at this time Ask seller a question You might also like 240 amp S series alternator for Jeep 4.0 Late Billet Black 170 Amp Racing Alternator GM Truck LS Engine Swap S Series 240a Racing alternator for Honda / Acura V6 S Series 240 amp Alt for Rav4 3.5 Contact To contact our Customer Service Team, simply click the button here and our Customer Service team will be happy to assist. Ask seller a question © Alternator Outlet | Mechman High Output Alternators Authorized Dealer. Fast Ship Times, Made in the USA! Shipping & Payments Shipping is FREE for this item Payment Accepted Payment Methods Immediate payment is required upon selecting “Buy It Now” or upon checking out through the cart. We accept payment via U.S. PayPal accounts and all Major Credit Cards, Debit Cards & Google Pay. We are legally required to collect sales tax in those states and localities where we maintain a physical presence (nexus). The applicable amount of sales tax charged to an order will be calculated based on the shipment destination’s state and local sales tax laws. Thank you for shopping with us on eBay! Returns Returns are not accepted Buyer will pay for return shipping. eBay integration by
Frequently Asked Questions About Sundown Audio – SD-4 Sealed Box Subwoofer 8″ Dual 2 Ohm (Open Box) in My Website
qubitpage.com is the best online shopping platform where you can buy Sundown Audio – SD-4 Sealed Box Subwoofer 8″ Dual 2 Ohm (Open Box) from renowned brand(s). qubitpage.com delivers the most unique and largest selection of products from across the world especially from the US, UK and India at best prices and the fastest delivery time.
What are the best-selling Sundown Audio – SD-4 Sealed Box Subwoofer 8″ Dual 2 Ohm (Open Box) on qubitpage.com?
qubitpage.com helps you to shop online and delivers Lululemon to your doorstep. The best-selling Lululemon on qubitpage.com are: TopLULULEMON TRAIN TO BE TANK, SIZE 8-10?? Womens Lululemon Wundermost Square-Neck Longsleeve Bodysuit Nulu Fabric Sz Large Lululemon Mens Size 40×32 5-Pocket Golf Pants Women Lululemon Solid Black Scoop Racerback Ribbed Full Day Ahead Tank Top Sz 4 BNWT Lululemon Cut-Out Knit Tank Top Size Extra Small MSRP $98!! Lululemon Everlux Yoga Short 6″ Linerless Mens Tight Fit Style: LM7AY1S Black LULULEMON Yoga Women’s Pink Full-Zip Hooded Jumper High Neck Black Size M LULULEMON RUNDER UNDER TIGHTS LIMITLESS BLUE CLARITY YELLOW HEATHERED COAL sz 2 Lululemon Sweetest Day Long Sleeve Grey Lululemon Everywhere Belt Bag 1L Tennesse University Logo New With Tags Lululemon Yogi Racerback W1I04S Marshmallow Stripe Heathered Sand Dune Black GUC Lululemon Ready To Rulu Jogger NWT Sizes 14 16 18 20 GNFN Green High Rise Pocket Lululemon Size 6 Wind Berry Rumble Multi Pink Maroon 5 Mile Singlet Tank Pigment Lululemon Womens Rest Less Pullover Top Bubble Dot Size M New Lululemon All Yours Cotton Tee Short Sleeve Shirt in Bone Lululemon Keep the Heat Thermal Long Sleeve Shirt in Green Twill, Size M. Lululemon ABC Pants Men’s Size 36 Navy Blue Classic Fit 6 Pocket Warpstreme Lululemon Groove Pant Super high rise Flare Nulu size 6 NWT Roasted Brown Lululemon Cool Racerback Pink Athletic Tank Top Size 6-8 LULULEMON WOMENS SLEEVELESS BUILT IN BRA CREAM COLORED ACTIVEWEAR TOP SZ 10 EUC Lululemon Approx Women’s Size 4 Activewear Top Tank Red Striped Cross Back White Lululemon Breeze By Muscle Tank Black Crew Neck Women’s Size 4 NEW LULULEMON ALIGN SHORTS 6″ GARNET MULTIPLE SIZES Lululemon Lighten Up Tank Heathered Black / Black Strappy Bra Sz 4 Lululemon, Coach, or Tory Burch eGC- $100. Instant Delivery Lululemon Soulcycle Swiftly Tech Top Thumbholes Long Sleeves Crew Tee T Shirt 8 Lululemon Glow On Hair Ties 6 Pack – Multi NWT Lululemon Cool Racerback Short Tank *Nulu Diamond Dye Bery Lunar Rock SZ : 6 Lululemon Womens Top 4 Tan Power Pivot Ribbed Tank Reversible Crop Yoga Pilates Lululemon Top Women’s 6 Swiftly Tech Black White Striped Shirt Gym Yoga Lululemon Bundle Lot of 6 Activewear Sz 6 NEW Women Lululemon Sculpt Tank Top Back Vent Black Size 8 & 10 Lululemon Size 6 Everlux Mesh Cropped Tank Urbantricity Multicolor | Fun Unique Lululemon Court Rival HR Skirt *Long NWT Sizes 6 8 10 12 TVlM White Lavender Women’s Lululemon No Limits Tank Size 8 Red Lululemon Free To Be Tank Nulu EUC Star Ruby Lululemon Cool Racerback Tank Women’s Size 4 Hyper Stripe Raspberry Glo Pink Lululemon Skirt Women’s Court Rival High-Rise Long Tennis White Marble NOUV Lululemon Open Back T Shirt Womens 6 White Stretch Gym Workout READ Lululemon Lightweight Cinched Hem Hiking T-Shirt Charged Indigo Purple Size 6 Lululemon Womens Pipe Dream Blue Down For It All Vest Running 700 Fill SZ 12 NEW Lululemon Dancing Warrior Tank Size 4 Bleacher Stripe White Iris / Iris Flower Lululemon In Mind 9″ Short Sz L – Black LULULEMON SCULPT TANK, SONIC PINK, NWT, 2 Lululemon Yoga Racerback Tank Top Women’s Sz 6 Black Activewear Lightweight Lululemon Tank Top Women’s 4 Gray Built In Bra Active Athletic Training Gym LULULEMON LOGO CUSTOM DECAL/STICKER.. PICK SIZE AND COLOR FREE SHIPPING Lululemon Size 14 Energy High Neck Longline Sports Bra Zip FUSP Flush Pink New LULULEMON Sz 4 Runderful LS 1/4 Zip Pullover Burgundy Gray Black thumbholes Z22 Lululemon Women’s Light Plum Striped Racerback Tank Top Size 6 Stretch Gym Yoga lululemon Align Tank Cropped Size 4 New NWT Bone Foil Shine Ribbed 2 x New LULULEMON Black LOGO Reusable Shopping Gym Lunch Bag Large Lululemon Swiftly Tech Short Sleeve Crew Hip Length black white striped sz 4 Lululemon Free To Be Tank Top Stripe size 2 9 SILVER Lululemon 0.6″ Iron On Heat Transfer Vinyl DIY HTV USA 9 SILVER Lululemon 1/2” Iron On Vinyl Heat Transfer DIY HTV Leggings Yoga Lululemon Women Breezie Regal Plum Black Sculpt Tank No Size Dot Lululemon Speckled Racerback Tank Women’s Black White Yoga Gym Athletic Lululemon Daily Stride Mid-Crew Sock Women’s Size L 9-11 LW9DW8S White Lululemon Air Support Bra Black/ASGY Size 36C MSRP $98 NWT NWT Lululemon Mastered Motion Cropped Tank ~size：4~Black Lululemon Women’s Top Size 8 (12 AU) Green Jumper.l Sweater On Repeat New Lululemon Cool Racerback Heathered Gray Tank No Size Tag Lululemon Light Green Workout Tank Womens EUC Lululemon Essential Tank *Pleated Pixel Jacquard Algae Green Black Size 4 Lululemon Small Silver and White Reusable Shopping Bag New Lululemon Heathered Purple Rest Less Tank Top Bra Bruised Berry Wee Stripe Sz 4 LULULEMON Bundle 2 White and Black Y Back Tank Tops size medium Lululemon Citron Tinted Canvas Cool Racerback Tank Womens Size 6 Gym Workout Lululemon Tied in Energy 2-in-1 Tank Black Frosted Mulberry Size 8 Lululemon Better Best Long Sleeve Porcelain Pink Cutout Top Women’s Size 4 EUC lulu Bend This Scoop and Cross Bra Light Support, A-C Cups Cascadia Green. NWT NEW Lululemon Align Leggings Black High Rise 25″ Sports Yoga Pant Size 2/4/6/8 Lululemon Men’s ABC Jogger Color-TRUE NAVY (TRNV) Size-Small (S)-TALL Lululemon Turbo Black Tank With Built in Bra Casual Women’s Sz. 6 LULULEMON THINK FAST LONG SLEEVE OM STRIPE HEATHERED SILVER SPOON MULTI YOGA 4 LULULEMON WOMENS SWIFTLY TECH LONG SLEEVE SHIRT 2.0 BERRY PINK 4? Lululemon Men’s Pace Breaker Linerless Short 7″ *LL NISE Night Sea Navy Size XXL Lululemon Athletic Top w/ Shoulder/Elbow Patches, Thumbholes, Women’s 2 (Yellow) Lululemon Speed Up LR short 2.5″ Inseam Lined Heather Black Size 8 Shorts NWT Lululemon The Fundamental Long Sleeve T Shirt in Anchor | LM3CZRS, S Lululemon Hot To Street Tank Luxtreme Self Bra Cross Back Regal Plum Size – 4 Lululemon Yoga Swifty Tech Sport Long Sleeve 2.0 T-shirt black Size 2/4/6/8/10 NWT$38 Lululemon Women’s Fast Free Run Hat One size SCGL Lululemon All Sport Bra Size 4 Lot of 3 Lululemon Black Tone It Tank Two in One Sports Bra Active Tank Top Womens Size 6 Lululemon Knot Gonna Fly Tank TENCEL Size 8 Heathered Deep Cove HDEC 13358 Lululemon Align HR Crop 23″ Tights NWT Size 4 LW6BGJS Black NWT LuluLemon Womens White Racerback Tank Top SZ4 Tencel Fabric Essential Sporty LULULEMON Cool Racerback Biggie So Fly Butterfly Fatigue Green Women’s Sz 6 $68 Lululemon Emerald Long Sleeve Lightweight Heathered Medium Grey Top SZ 8 M Lululemon Cool Racerback Windy Blooms Saphire Blue Multi Fitness Tank Size 4? Lululemon Shirt Womens Medium Black Sleeveless Knit Lightweight Casual Ladies LULULEMON Women’s Tank Top Racerback Athletic Sleeveless Pullover Size 4 Purple Sales US New Lululemon Never Lost Keychain New Lululemon Salute The Sun Tank Womens 4 Heather Gray Split Back Lightweight Logo Lululemon Women’s Pull Me Over Hoodie Long Sleeve Heathered Back Gray Sz 6 Lululemon Soft Breathable Bikini 4 Pack Underwear MYSH Size XL Lululemon Rest Less Tank Womens 6 Gray Built In Floral Bra Lululemon Tank Top Pink Stripe Womens Size 6/8 Mens Pullover Fleece Hoodie