Z321 of Z3 Simply Amazing Subwoofers

Z321 of Z3 Simply Amazing Subwoofers

Usually Ships in 1-2 Days
Calculated at Checkout
The Z series is the result of our ongoing study in the field of world subwoofer domination. The Z project represents the culmination of DD's ultimate engineering goal which is to push the limits of delivered energy by utilizing high-performance composite technologies. The Z series takes its place as the flagship of the DD sub line by having the highest motor strength, greatest voice coil cooling capability, most overbuilt design features, and last but not least True To The Source sound reproduction. AmaZing!



Driver Size 21"
Watts RMS 1000 - 4000 
Peak Power 8000 
VCD 3.35 
Impedance D0.5 / D0.7 / D1 / D1.5 / D2 
Piston Dia - in 18 1/4
Frame OD - in 21 5/16
Frame OD w/Gasket - in -
Mounting Diameter - in 19 1/4
Mounting Depth - in 13 1/8
Motor Diameter - in 9 
Motor Depth - in 5 5/8
Woofer Displacement - cu ft 0.52
Shipping Weight - lbs 76
Sealed Enclosure - cu ft N/A 
Ported Enclosure - cu ft 6.0 - 8.0

Any DD Audio Product bearing the Marine Grade logo incorporates water resistant features enabling it to be used in applications where moderate exposure to moisture will not result in damage to the product. 

Marine Grade products are not waterproof, and submersion or excessive moisture exposure may result in product failure. DD Audio Marine Grade products are not certified for saltwater environments.

Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within a few business days, 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 (1 to 2 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.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

SinghElectronics.ca Warranty: _________________________ 30 Days Manufacturer's Warranty: _________________________ 1 Year

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