TRU SPEC Prefab Quad 8" Subwoofer Enclosure Subs Up Port Back
Key features
- Flush baffle.
- Sub-up, port-back layout provides a defined orientation for planning driver and port clearance.
- 0.75-inch MDF construction.
- Empty enclosure lets you select the subwoofers separately; no subwoofer is included.
TRU SPEC Prefab Quad 8" Subwoofer Enclosure Subs Up Port Back is backordered and will ship as soon as it is back in stock.
TRU SPEC Prefab Quad 8" Subwoofer Enclosure Subs Up Port Back is backordered and will ship as soon as it is back in stock.
Description
Description
Product Overview
Plan a four-subwoofer installation with the Tru Spec quad 8-inch ported enclosure. The subs-up, port-back layout combines four 7.45-inch cutouts with a flush baffle and a published total net volume of 3.50 ft³.
This is an empty enclosure only. No subwoofer is included.
Key Features & Benefits
- Flush baffle.
- Sub-up, port-back layout provides a defined orientation for planning driver and port clearance.
- 0.75-inch MDF construction, with the enclosure dimensions and acoustic specifications listed below for comparison.
- Empty enclosure lets you select the subwoofers separately; no subwoofer is included.
Technical Specifications
| Enclosure type | Ported; empty enclosure only |
|---|---|
| Subwoofer configuration | 4 x 8-inch |
| External dimensions (W x H x D) | 34.00 inches x 14.00 inches x 22.00 inches |
| Material | MDF |
| Material thickness | 0.75 inch |
| Total net internal volume | 3.50 ft³ |
| Tuning frequency | 35 Hz |
| Port area | 52.00 in² |
| Cutout diameter | 7.45 inches |
| Flush trim diameter | 9 inches |
| Baffle and reinforcement | Flush baffle |
| Layout | Subwoofer(s) up; port back |
| Total driver-displacement allowance | 0.24 ft³ |
| Driver-displacement allowance per subwoofer | 0.06 ft³ |
Why Choose This Product?
This enclosure gives a quad 8-inch project a defined footprint, tuning frequency and port area without designing the box from scratch. The supplier lists several compatible driver families, but the final choice still needs to match the cutout, clearance and airspace requirements.
Installation & Compatibility Notes
- Supplier-listed alternatives: Deaf Bonce Machete MF 8-inch, DC Audio M3 8-inch, CT Sounds Meso 8-inch, Skar VD 8-inch, Skar SDR 8-inch, Skar SVR 8-inch, Skar EVL 8-inch, DS-18 Elite Z 8-inch.
- The quoted net volume uses the supplier's 0.24 ft³ total driver-displacement allowance. A different driver displacement changes the final available airspace.
- The supplier describes typical 8-inch driver displacement as 0.05–0.06 ft³ per driver; use the actual displacement of your chosen subwoofers.
- Measure the intended vehicle space and its access opening. Check basket and motor clearance, mounting depth, terminals and cone clearance against the actual driver. No vehicle-specific fitment is claimed.
- A maximum mounting-depth measurement is not provided in the supplier description. Confirm clearance for your exact subwoofer before purchase.
- Leave the port opening unobstructed and confirm the driver manufacturer's recommended ported volume and tuning. Secure the enclosure appropriately for the vehicle installation.
Frequently Asked Questions
Are subwoofers included?
No. This listing is for an empty ported enclosure only. The 4 compatible 8-inch subwoofers are selected and purchased separately.
Does matching the nominal subwoofer size guarantee compatibility?
No. Confirm the exact model, cutout, mounting depth, basket clearance, displacement and recommended enclosure volume. A 8-inch size label alone is not enough to establish fit.
Which direction do the subwoofers and port face?
The driver mounting positions face upward and the port faces the back. Check clearance above the subwoofers and around the port in the planned installation.
Explore More
Compare more options in our Tru Spec enclosures collection, or contact 12 Volt Outlet with your subwoofer model and available installation space for help checking this enclosure.
