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LAB SlapBox™ 3.70 ft^3 Ported MDF Enclosure Box for Single 15" Subwoofer (14-1/8" Cutout)

$399.99

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SKU: SB-5516
Description

LAB SlapBox™ Series – Engineered to Slap. Built to Last.
The LAB SlapBox™ isn't your average prefab—it’s a purpose-built, high-performance enclosure designed to get loud, hit low, and maintain clarity across a wide frequency range. Tuned between 32–34Hz and built to handle serious output, each SlapBox™ is precision-cut, ruggedly built, and ready to elevate your system. Whether you're chasing SPL, SQ, or a well-rounded daily driver, this enclosure delivers dependable performance and aggressive sound.


  • Universal Fitment
    Designed to accommodate most standard 15" subwoofers that call for around 3.70 cu. ft. of ported airspace—ideal for custom trunk or hatch installs.
  • Tuned for Output and Clarity
    Features 3.70 cu. ft. of internal airspace (before driver displacement) and is tuned to 35Hz for tight response and impressive low-end authority.
  • Built to Slap
    Constructed from CNC-cut 3/4" MDF with a reinforced 1" front baffle for strength and stability under heavy bass loads.
  • Durable and Clean
    Wrapped in high-grade black automotive carpet for a professional appearance that fits cleanly into most vehicle applications.

Features
  • Ported enclosure for a single 15" subwoofer
  • Compatible with most standard or high-performance 15" subs
  • 3.70 cu. ft. internal volume (before driver displacement), tuned to 35Hz
  • Precision-cut 3/4" high-grade MDF with reinforced 1" front baffle
  • Wrapped in premium black automotive-grade carpet
  • Heavy-duty speaker terminal
  • Proudly made in California, U.S.A.

Technical Specifications
  • Enclosure volume: 3.70 ft³ (before driver displacement)
  • Peak tuning frequency: 35Hz
  • Port size: 16.50" x 3.25"
  • Subwoofer cutout diameter: 14.125" (14-1/8")
  • External dimensions: 32" W x 18" H x 18" D
Shipping & Delivery

Free shipping applies to orders $50 and over shipped within the 48 Contiguous U.S. States. Most orders ship the same or next business day. Tracking is included and will be updated upon shipment.

Additional shipping fees are required for all other locations (including but not limited to): PO Boxes, APO/FPO address, AK, HI, PR, Guam, Canada, and other countries outside the USA

We will make every attempt to process and ship orders within 2 business days of your cleared payment. We will contact you, should there be a problem or delay with your order. Please allow proper delivery time for your package to arrive.

Orders via UPS Ground arrive within 2-6 business days. Smaller or lighter weight items typically ship via USPS First Class or USPS Priority Mail.