Hertz MPBX 300 S2 12" Shallow Sealed Subwoofer Loaded Enclosure

Your plug and play bundle is hand assembled in our Frederick, MD facility. Current processing lead times from order to ship: 8-10 business days

Mille PRO shallow subwoofers have been designed to achieve exceptional performance even when there is very little space available to install the subwoofer box.

The subwoofers are optimized to work in ultra-compact sealed boxes starting from only 22,7 (0.8 Cf) for 12’models (MPS 300). A typical example is a subwoofer enclosure under the rear bench of pickup trucks, where the space – and the height – are limited.

The new MPS (Mille PRO Shallow) subwoofers have a depth/performance ratio never achieved before thanks to the impressive cone excursion capacity which is 20% higher than a traditional design.

Tested and Approved by Trail Seven: These subwoofer has been installed and tested on our Trail Seven Bronco. We're proud to give this subwoofer our stamp of approval, ensuring it delivers the performance you expect!

Extreme Bass Output: Don’t be fooled by size—Hertz-Audison subwoofers are designed for massive output even in compact spaces. Featuring an oversized voice coil and powerful neodymium magnet, these shallow-mount subwoofers deliver deep, hard-hitting bass with 600W RMS power handling—giving you the full-bodied low-end response that brings your music to life.

Upgrade your Bronco’s sound system with Hertz-Audison and enjoy studio-quality audio on every drive.

Hertz 12" Shallow Sealed Enclosure MPBX 300 S2: MPBX 300 S2 ultra-shallow sealed enclosure is specifically optimized to deliver all the MPS 300 S2 subwoofer performances. The enclosure structure features incomparable robustness thanks to 15 mm (0.59 in.) wood thickness. Internal sound-absorbing material virtually increases the box's volume and reduces acoustic resonances.

• Ultra-shallow sealed enclosure specifically optimized to deliver all the MPS 300 S2 subwoofer performance.
• 15 mm (0.59 in.) wood thickness for incomparable robustness.
• Panel-to-panel internal bracing with solid corners to minimize resonances
• Round corners to ease the placement
• Internal sound-absorbing material virtually increases the box’s volume and reduces acoustic resonances. 
• 2S² (2 Sides/2 Sounds) design provides the ability to choose between Down-Firing mounting, through supplied feet with Hook-and-loop inserts, to increase the low-frequency extension, and Up-Firing install to obtain more punch and definition.
• SSP (Sub Smart Plug) features both Plug-&-Play terminal block and traditional push terminals providing bulletproof connection and quick release.
• Robust screw-less mesh grille included featuring adjustable logo position suitable for reverse install.
• EID: Scan, Discover, Identify.

• 2021 - Current Bronco: (Factory B&O) 2 & 4-Door
• 2022 - Current Bronco Raptor: (Factory B&O) 4-Door

Hertz 12" Shallow Sealed Enclosure MPBX 300 S2:

• Size mm (in.): 300 (12)
• Power Handling - Continuous W: 500
• Power Handling - Peak W: 1000
• Impedance Ohm: 2
• Voice Coil Ø: 38 (1.5)
• Frequency Response: Hz25 - 400
• Magnet size D x d x h mm (in.): 134 x 55 x 36 (6.28 x 2.17 x 1.42)
• Weight of one component kg (lb.): 10,8 (23.8)
• Magnet: High density flux ferrite
• Cone: Polypropylene
• Xmech mm (in.): 20
• Depth mm (in.): 118 (4.65)
• Voice Coil Type: Single
• Dim: L 23.9" x D 15.79" x H 6.89"

• Shallow Enclosure: Hertz MPBX 300 S2 12" shallow enclosure