Proline X Performance P15D-S Sealed Enclosure for Dual 15" Subwoofers

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.
Proline X Performance P15D-S
Dual 15" Sealed Subwoofer Enclosure
Professional-grade bass solution engineered for serious audiophiles who demand maximum performance from their dual 15" subwoofers
Premium Performance Features
Engineered with proprietary Apex MDF and precision craftsmanship for uncompromising bass performance
Proprietary Apex MDF
High-density Apex wood composite delivers superior strength and durability, withstanding the most demanding audio setups while minimizing resonance.
Interlocking Bracing System
Advanced internal bracing design enhances structural integrity, minimizing vibrations and resonances that can degrade sound quality.
Precision CNC Construction
Computer-controlled cutting ensures exact dimensions and perfect fit, maximizing your dual 15" subwoofers' potential for deep, precise bass.
Premium Trunk Liner
Salt and pepper trunk liner provides additional protection and a sleek, professional finish that complements any vehicle interior.
Handcrafted in USA
Each enclosure is meticulously hand-built in Northern California with stringent quality controls, ensuring exceptional craftsmanship.
Laser-Cut Acrylic Badge
The front face proudly displays the Proline X laser-cut acrylic badge, a distinctive mark of outstanding quality and craftsmanship.
Professional Specifications
Physical Dimensions
Construction Details
Perfect For These Applications
Professional-grade enclosure designed for serious audio enthusiasts
Competition Audio
SPL competitions and sound quality events requiring maximum bass output and precision
High-End Vehicles
Luxury cars and premium audio systems demanding professional-grade components
Serious Audiophiles
Audio enthusiasts who refuse to compromise on bass quality and performance
Custom Installations
Professional car audio shops building premium custom sound systems
High-Power Systems
Systems pushing 2000+ watts requiring enclosures built for extreme power handling
Show Vehicles
Car shows and exhibitions where both performance and appearance matter
Performance Line vs Economy Line
Performance P15D-S
- Proprietary Apex MDF Construction
- Advanced Interlocking Bracing
- Laser-Cut Acrylic Badge
- Premium Trunk Liner Finish
- 4ft³ Optimized Airspace
Economy E12D-S
- Standard MDF Ultralight
- Single Internal Brace
- No Premium Badge
- Standard Gray Liner
- 2ft³ Airspace (12" drivers)
Professional Installation Guide
Recommended Amplifier Specifications
Professional Installation Tips
Position away from vehicle walls for optimal bass extension and to prevent rattling
Use 8-12 AWG speaker wire for high-power applications to ensure optimal power transfer
Allow 20-40 hours of moderate play time for optimal performance
Recommended for maximum performance and warranty protection
The Audio Intensity Promise
30+ Years Experience
Three decades of audio engineering expertise, veteran-owned and operated in Northern California
Quality Guarantee
Rigorous quality control from assembly to completion ensures you won't find better boxes for the price
Customer Support
Dedicated support team with extensive knowledge to help you get the most from your investment
Ready to Experience Professional-Grade Bass?
The Proline X Performance P15D-S delivers the power, precision, and quality that serious audiophiles demand. Don't settle for anything less than professional-grade performance.
⚠️ Important: Subwoofers sold separately - enclosure only
📞 Professional installation recommended for optimal performance
Proudly manufactured in Northern California | Veteran-Owned Business | 30+ Years of Audio Excellence
Proline X Performance P15D-S Sealed Enclosure for Dual 15" Subwoofers
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.