Polk DB402 4" Coaxial Speakers with Marine Certification
Professionally Maintained Demo Units
Every demo unit has been carefully maintained by our certified technicians. These aren't customer returns or damaged goods - they're the same high-quality equipment we've used to demonstrate premium sound to our customers for years.
Pre-Tested & Verified
Unlike typical clearance sales, every item has been tested and verified by our technical team. We stand behind the quality of our relocation inventory.
Everything Must Go Pricing
These aren't regular sale prices - this is genuine "moving warehouse" pricing. Discounts you simply won't find under normal retail circumstances.
Trade Show Display Models
Many items are pristine display models from major audio trade shows - equipment that's been seen but never installed. These pieces often include special editions or limited releases not available through regular retail channels.
The DB402 4" coaxial speakers represent Polk Audio's commitment to delivering exceptional sound quality in a compact, marine-certified package. These speakers feature Dynamic Balance technology and IP56 marine certification, making them perfect for cars, boats, motorcycles, and ATVs. With 135W peak power handling and a frequency response of 60Hz-22kHz, the DB402 speakers deliver crystal-clear highs, rich midrange, and surprisingly robust bass for their 4-inch size.
Superior Marine Protection Technology
Marine certification isn't just a label – it's peace of mind. The DB402 speakers undergo rigorous testing for salt-fog, UV exposure, and humidity resistance. The polypropylene UV-tolerant cone maintains its pristine appearance and performance even after years of exposure to harsh elements. Waterproof inner and outer surrounds completely seal the speaker housing, preventing dirt, moisture, and debris from compromising sound quality or longevity.
Dynamic Balance Engineering Excellence
Polk's patented Dynamic Balance technology uses laser imaging to identify and eliminate unwanted resonant frequencies during the design phase. This process ensures distortion-free sound reproduction with wide dispersion characteristics. The lightweight polypropylene cone delivers spectacular midrange clarity while the 0.75" silk dome tweeter provides smooth, detailed high-frequency response without harshness.
Universal Installation Versatility
The shallow tweeter design ensures factory grilles reinstall perfectly, maintaining your vehicle's original appearance. With universal 4-hole and 2-hole mounting compatibility, these speakers drop into virtually any 4" speaker location. The included mounting hardware, grilles, and wiring make installation straightforward for both DIY enthusiasts and professional installers.
Polk DB402 4" Coaxial Speakers with Marine Certification
Frequently Asked Questions
Are these items authentic, and why are the prices so low?
This sale includes demo units we've used for customer demonstrations since 2016, new-old-stock from discontinued product lines, display models from trade shows, and carefully curated inventory we've collected over nearly a decade. Most items include original packaging where available.
What types of items are included in the relocation sale?
Our relocation sale includes demo units we've used for customer demonstrations, new old stock from discontinued product lines, and display models from trade shows. All items are genuine products from top car audio brands - we're simply clearing inventory we can't take to our new location. Items range from amplifiers and speakers to processors and accessories accumulated over nearly 10 years at this location.
Do sale items come with manufacturer warranties?
Warranty coverage varies by item and condition. New old stock items typically include full manufacturer warranty if still valid. Demo and display items may have limited or no manufacturer warranty remaining. We clearly state warranty status in each product description. All sales are final on relocation sale items.
How does shipping work for relocation sale items?
We ship relocation sale items using the same careful packaging methods as our regular inventory. Shipping costs are calculated at checkout based on size and weight. For multiple item purchases, we'll combine shipping where possible to save you money. Large items like subwoofer boxes may require freight shipping with additional costs.
Can I return or exchange relocation sale items?
All relocation sale items are sold as-is with no returns or exchanges. We encourage local pickup customers to inspect items before purchasing. For shipped items, we provide detailed descriptions and photos. Since we're relocating, we cannot accommodate returns or warranty service after the sale period ends.