




Professional Series · Datasheet
Professional Series Ported Dual 6.5" Universal Enclosure Dual 6" Ported enclosure
- Net volume
- 1.50 Cubic Feet
- Tuning
- 35.0 Hz
- External dimensions
- 29.50 Inches W × 10.00 Inches H × 16.75 Inches D
- Front baffle
- Triple-Layer 2.25" MDF
- Alignment: 1.50 cu ft net vented at 35.0 Hz
- Driver: Universal, not driver-specific
- Build: Front-firing standard box, triple 2.25" baffle, dado joinery
- Cabinet: 29.50" W x 10.00" H x 16.75" D, 40 lb
Spec of record
Technical specifications
| Series | Proline X Professional |
|---|---|
| Enclosure Type | Universal | Front-Firing Standard Box |
| External Width | 29.50 Inches |
| External Height | 10.00 Inches |
| External Depth | 16.75 Inches |
| Internal Volume (Net) | 1.50 Cubic Feet |
| Port Tuning (Fb) | 35.0 Hz |
| Port Area | 23.5 Square Inches |
| Driver Fitment | Universal, No Driver-Specific Cutout |
| Material | Langboard Elite 3/4" MDF |
| Joinery | Dado Joinery (CNC-Cut), Flat Panels |
| Front Baffle Construction | Triple-Layer 2.25" MDF |
| Baffle Layers | 3 |
| Acrylic | Glossy Black Universal Logo Insert, Outer Layer, Standard |
| Terminal Cup | Proline X ABS/Carbon Fiber Composite | Back Panel, Terminal-Cup Side | 12g OFC Pre-Wired |
| Damping | None - Ships Dry. Polyfill Detunes A Ported Enclosure |
| Carpet Finish | Plush Black |
| Weight | 40 lb |
| Shipping | UPS Ground Parcel, Included In The 48 States |
| Bundle Options | Enclosure Only |
| Warranty | 2-Year Limited (Enclosure) |
| Manufactured | Tullahoma, Tennessee, USA |
Modelled response
Performance in this enclosure
This cabinet is cut to a standard cutout rather than one driver, so there is no single alignment to model; the volume and tuning are stated for the buyer to check against their driver's published parameters.From the shop floor
Installer's take
This is the dual version of the universal six and a half inch box: same per-driver airspace as the single, just two drivers sharing one cabinet.
Check each driver's own published ported recommendation against this box's 1.50 cubic feet, split evenly between two chambers, at 35.0 Hz before you commit to this box; it is built for a driver that lands in that range, not any specific model.
Wire whatever coil configuration your drivers ship in the way their own manufacturer recommends.
It ships dry. Do not add polyfill to a ported box. Set your subsonic filter around 28 Hz.
How it's built
Construction

Why Choose the XL Small Woofer Enclosure?
Looking for a compact enclosure that doesn’t compromise on sound quality? The XL Small Woofer Enclosures are designed to push your system to the next level, delivering an audio experience that’s bigger, louder, and better than the competition. Built for durability and performance, these enclosures are the perfect match for audiophiles seeking premium bass in a space-efficient design.
Is your woofer ready for the challenge? The XL Small Woofer Enclosures are here to amplify your audio experience.
Before you order
Questions
Why is this enclosure tuned to 35.0 Hz?
Tuning is chosen for in-car response rather than an anechoic curve; this cabinet lands at 35.0 Hz on 1.50 cubic feet net.
What makes this Professional rather than Performance Optimized?
The box. A Performance Optimized cabinet is cut to fit a trunk shape on a 1.5 inch double baffle; this one is a full-size front-firing box on a 2.25 inch triple baffle. It carries a 2 year warranty against 1.
Threaded inserts or a kit?
Threaded insert kit included: inserts sized to a standard 6.5 inch subwoofer, the correct drill bit, allen-head screws, allen key and gasket tape.
Is a driver included?
No; this is a universal enclosure.
Would a sealed box be better for me?
That depends on the driver you put in it. A sealed alignment trades output near tuning for a flatter, more controlled response; a vented one like this trades some control for more output. Check the driver's own published sealed and vented recommendations before you choose.
How does the port work?
It is a slot port of 23.5 square inches tuned to 35.0 Hz.
How heavy is it and how does it ship?
40 lb, 29.50" W x 10.00" H x 16.75" D external. It ships as a UPS parcel; the price includes shipping in the 48 states.
Which drivers fit?
Any 6.5 inch subwoofer with a standard cutout whose published parameters suit 1.50 cubic feet vented at 35.0 Hz; check the maker's recommended ported volume against it.
Same series, same size
Professional Series Ported 6.5"