Proline X subwoofer enclosures, CNC cut in Tullahoma, Tennessee
Built Different. Built Better.
Sealed, ported and down-firing enclosures built to the driver, not the shelf. This site is the engineering reference: every model's datasheet, series by series, with the numbers an installer compares on.
Series
Pick a series, get the whole model table
Micro Series
Compact sealed enclosures for shallow-mount and small-footprint installs.
Micro Series enclosures are built for vehicles with no room to spare: single cab trucks, behind-seat spaces and small trunks. They suit the installer who has measured the cavity first and needs the enclosure to fit it, rather than the other way round.
- 18 models
- Sealed
- 10", 12", 15"
- Dual, Single
Performance Series
Universal sealed and ported enclosures in single and dual 8", 10", 12" and 15".
The Performance Series is the universal line: enclosures sized to standard driver dimensions rather than to one specific model, for the buyer who wants a known-good box without waiting on a driver-specific build.
- 22 models
- Ported and Sealed
- 6", 8", 10", 12", 15"
- Dual, Quad, Single, Triple
Performance Optimized
Driver-specific enclosures solved from the manufacturer's Thiele-Small parameters.
Each Performance Optimized enclosure is designed around one driver family, with net volume, port tuning and mounting depth solved from that maker's published Thiele-Small parameters. It suits the buyer who already owns the driver and wants the box that driver was modelled in.
- 380 models
- Ported and Sealed
- 8", 10", 11", 12", 13", 15", 18"
- Dual, Single, Triple
Professional Series
Multi-layer baffle enclosures for high-output subwoofers.
Professional Series enclosures are built for drivers that push harder than the universal Performance Series lineup is designed around: high-excursion, high-power models where the baffle has to hold the motor still.
- 15 models
- Ported and Sealed
- 8", 10", 12", 13", 15"
- Dual, Single
Down-Firing Series
Down-fire sealed and ported enclosures for cargo bays and behind-seat spaces.
Down-firing enclosures load against the vehicle floor rather than radiating into the cabin directly. That keeps the cone protected, hides the driver, and lets a box sit under a rear seat or in a cargo bay where a forward-firing cabinet would not fit.
- 144 models
- Ported and Sealed
- 8", 10", 11", 12", 13", 15"
- Dual, Single, Triple
Vehicle Specific
Direct-fit enclosures for specific trucks, SUVs and Jeeps.
Vehicle Specific enclosures are cut to the cavity of the vehicle they are named for and install without modification: no trimming, no brackets fabricated on the day, no compromise on the seat travel or the cargo floor. They suit an owner who wants the enclosure to disappear into the vehicle rather than take space away from it.
- 1 models
- Sealed
- 12"
- Dual
Vehicle specific
Direct-fit enclosures by truck and SUV
Learning Center
Enclosure design, explained by the people who cut them
Passive vs Active Subwoofers
Complete comparison of passive vs active subwoofers covering amplification, installation requirements, performance differences, and cost considerations.
Subwoofer Impedance Guide
Complete subwoofer impedance guide explaining 2 ohm, 4 ohm, 8 ohm configurations, amplifier matching, and power delivery for optimal bass performance.
Subwoofer Magnet Types
Complete guide to subwoofer magnet types including ferrite, neodymium, and ceramic magnets, and their impact on performance, efficiency, and sound quality.
Ready to buy?
Every Proline X enclosure ships factory-direct from Audio Intensity. Datasheets here link straight to the sales page for that model.