start of prefixes end of prefixes start of suffixes Brand: Polk Audio Model: SDA-2 Type: Woofer Cone Interface: Speaker Wire Terminals Comprenew Grade A: Full Functionality | All Functions Perform as Intended  For more information regarding our Online Return Policy, click here.   end of suffixesPolk Audio SDA-2 Woofer Cone | Grade Astart of prefixes end of prefixes start of suffixes Brand: Polk Audio Model: SDA-2 Type: Woofer Cone Interface: Speaker Wire Terminals Comprenew Grade A: Full Functionality | All Functions Perform as Intended  For more information regarding our Online Return Policy, click here.   end of suffixes About UsShippingReturnsAbout Us About UsShippingReturnsAbout Us Comprenew is a nonprofit electronics refurbisher and recycler, committed to giving your retired electronic devices new life, whenever possible. We maintain the highest international standards in electronics recycling and data security, ensuring your confidential data is never compromised. We’ll even come to you by offering unmatched transportation services for your unwanted electronic material. We also offer affordable refurbished products at 3 retail locations in West Michigan and have 14 e-waste collection sites throughout the Midwest. Additionally, we provide job-readiness and computer literacy programs to under-served members of our community. By choosing us as your electronics recycling, data destruction, or ITAD provider you can feel good about helping us create a sustainable future for our community and our planet.About UsShippingReturns Shipping About UsShippingReturns Shipping Shipping: Comprenew only ships and accepts returns within the United States, through FedEx and USPS. Products usually ship within 24hrs after payment. Orders placed outside of business hours will be shipped and ready for pick up the following business day. If shipping to a PO Box, you must select the “Priority Mail” shipping option. Please make sure your shipping information is correct. Comprenew does not accept pre-printed shipping labels. Shipping will not be refunded for returned items. Comprenew is responsible for paying for return shipping within the 30-day return period.About UsShippingReturns ReturnsAbout UsShippingReturns Returns All returns MUST include the original receipt, packaging, and adapter (if applicable). Returns may be made either in-store or with a prepaid return label. Items that are missing components, damaged, or altered because of customer actions, are non-returnable and non-exchangeable. Damage includes but is not limited to: damage caused by operator error, physical or electrical stress, and virus or spyware infection. Items that are damaged in return shipping, may sustain a deduction of up to 30% on the refund. Refunds: All orders must be returned in order to receive a full refund, otherwise, a partial refund will be issued. Refunds are issued via the same payment method used to place the original order. Please allow 3-5 business days for any refund to clear with your financial institution. Shipping costs will not be refunded. Refunds on devices that contain data, such as but not limited to, computers, cell phones, tablets, hard drives, and flash storage are subject to a 15% data sanitization fee.More Professionally Refurbished Products from Comprenew:Dell Latitude E5570 No OS i7-6600U 16GB RAM 256GB M.2 SSD$192.50BUY NOWAmerican Optical Microscope Model Fifty$39.00BUY NOWDell Latitude E7470 Win 10 Pro i7-6650U 16GB RAM 256GB NVMe$203.00BUY NOWMimo um-1080cp-b 10 Touchscreen Conference Monitor | Grade A$100.00BUY NOWDell Latitude 5580 i5-7300U 8GB Ram 256GB SSD No OS$157.50BUY NOWDell OptiPlex 3040 Win 10 i3-6100 8GB Ram 1TB HDD$84.00BUY NOWDell Precision 5810 Xeon E5-1620 V3 2GB GPU 8GB RAM NO HDD$70.00BUY NOWSamsung HW-F450 Sound Bar & Wireless Subwoofer$75.00BUY NOW Listing and template services provided by inkFrog

Legendary Polk SDA II speakers with interconnect cable. Polk’s line of Stereo Dimension Array (SDA) speakers, which were designed to create a more natural stereo sound stage than is possible with conventional forward-facing speaker systems. The SDA technology involves combining two speaker systems in each cabinet of a mirror-image stereo pair. The inner one (nearest to the center of the room), called the “stereo array,” is a normal stereo speaker. The second system, known as the “dimensional array,” is located a few inches to the outside of the stereo array. Each dimensional array is driven by the stereo signal from the opposite speaker in the pair, and the frequency, phase, and amplitude characteristics of its output are modified so that when its sound reaches the ear of the listener, it cancels the sound arriving at that ear from the opposite speaker. The result, in the ideal case, is that each ear hears only the sound from its corresponding speaker, without the “interaural crosstalk,” and consequent spatial distortion, that would otherwise exist. Eliminating interaural crosstalk effectively removes the physical speakers as apparent sound sources. SDA-2 is a superb speaker regardless of its spatial characteristics. Im moving and cannot take them with me because of the size and weight.

Local pickup only!Cosmetically and functionally in fantastic condition, with no issues. Comes with interconnect cable and speaker cables. These sound wonderful! I no longer need them.One Caveat- I am going to Brooklyn, NY in 2 weeks so I could bring with me and deliver on the way. Will need to discuss!

Woofers were pulled from working SDA-1C speaker and are in very good condition and are working properly. Woofers were just treated with 303 protectant. Mounting screws included. Please see pictures for additional detail on condition and ohm readings for both speakers. Speakers will be well packed for shipping and will ship in individually in USPS medium size boxes Woofers sold individually - 2 available

Local pickup only! Cosmetically and functionally in fantastic condition, with no issues. Comes with interconnect cable. These sound wonderful! I need the space, so they need a new caring home. The last photo is specs off of hifiengine.com Local Pickup only!

PAIR of Polk Audio SDA-2 Speaker System Floor Standing Speakers. These are Stereo Dimensional Array speakers, which have attracted quite a following in the Polk aAudio Community. (Check out the blogs.) Includes the cord that connects the two speakers together for wider dimensional, listening through noise canceling technology. The SDA-2 is often modded and updated by those who know how to do it. Owner’s manual is also included. There has been only one owner, and the speakers have been lovingly cared for in a smoke-free and pet-free environment. Since they are almost 40 years old, there is some fading of the cabinet finishes, mostly on the tops, but they still sound great.

PAIR of Polk Audio SDA-2 Speaker System Floor Standing Speakers. These are Stereo Dimensional Array speakers, which have attracted quite a following in the Polk aAudio Community. (Check out the blogs.) Includes the cord that connects the two speakers together for wider dimensional, listening through noise canceling technology. The SDA-2 is often modded and updated by those who know how to do it. Owner’s manual is also included. There has been only one owner, and the speakers have been lovingly cared for in a smoke-free and pet-free environment. Since they are almost 40 years old, there is some fading of the cabinet finishes, mostly on the tops, but they still sound great.

Polk Audio SDA-1 SDA-2 magazine ad. From the October 83 issue of Audio Magazine. It is an original. Not a copy. In good condition. Safely packed, we do include a stiff cardboard insert, the insert and ad wrapped with saran wrap and a Please Do Not Bend sticker on the envelope to help preserve the integrity of the ad.