Hertz MPS 300 S2 12-inch Peak 1000W Shallow Car Subwoofer
The Hertz MPS 300 S2 is built for one specific situation: you want serious 12-inch bass, but you don't have the space for a standard subwoofer enclosure. At just 88mm deep and optimised for sealed boxes from 22.7 litres, it fits where most subs won't. The 2 Ohm impedance makes it a natural match for high-current amplifiers that deliver more output at lower loads — so you get more from your amp without needing a bigger driver.
What is the Hertz MPS 300 S2?
The MPS 300 S2 is a 12-inch shallow-mount subwoofer from Hertz's Mille Pro series. It shares the same ultra-shallow platform as the MPS 300 S4 but runs at 2 Ohm single voice coil impedance, making it the better choice for amplifiers that are rated for higher output at lower loads. It handles 500W continuously and peaks at 1000W, with a depth of just 88mm (3.46 inches) and a recommended sealed enclosure volume of 22.7 to 24 litres (0.8 cubic feet). Like the rest of the Mille Pro shallow range, it uses Hertz's A.I.R. technology and a redesigned suspension structure to deliver 20% more cone excursion than a conventional shallow-mount design.
Why Choose the Hertz MPS 300 S2?
- ✅ 2 Ohm impedance — draws more current from your amplifier for higher output efficiency
- ✅ Ultra-shallow 88mm depth fits where standard 12-inch subs cannot
- ✅ 1000W peak power from a driver that's barely 3.5 inches deep
- ✅ Optimised for compact sealed boxes from 22.7L — no large enclosure needed
- ✅ A.I.R. technology prevents thermal compression during sustained high-power use
- ✅ 20% more mechanical excursion than traditional shallow designs
- ✅ Non-vented rear design allows even shallower enclosure builds
- ✅ Six-layer copper voice coil for high thermal capacity and long-term reliability
- ✅ Die-cast aluminum frame for rigidity under high-excursion loads
- ✅ Solid 8AWG spring-loaded terminals for a secure, rattle-free connection
- ✅ Screw-less mesh grille included for a clean, finished install
Key Features
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Size – 300mm (12 inches): Full 12-inch cone area for genuine low-frequency extension, despite the shallow profile.
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Power Handling – 500W Continuous / 1000W Peak: Handles serious amplifier output without distortion or thermal failure.
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Impedance – 2 Ohm, Single Voice Coil: Lower impedance draws more current from the amplifier, increasing output — ideal for amps rated at 2 Ohm.
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Depth – 88mm (3.46 inches): One of the shallowest 12-inch subwoofers available, enabling installs that would otherwise be impossible.
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Optimised Enclosure Volume – 22.7L to 24L (0.8 CF): Works in genuinely small sealed boxes, ideal for pickup truck under-bench builds and compact boot installs.
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Voice Coil – 38mm (1.5 in.) Six-Layer Copper: High thermal mass keeps the coil cool during extended high-power sessions.
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Xmech – 20mm (0.79 in.): 20% greater mechanical excursion than conventional shallow designs, delivering deeper bass from a smaller package.
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Non-Vented Rear Design: Eliminates rear ventilation clearance requirements, allowing the enclosure to be built shallower.
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8AWG Spring-Loaded Terminals: Horizontal solid terminals accept thick gauge wire and hold it securely without loosening over time.
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Screw-less Mesh Grille: Included with black screws for a clean, professional finish.
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Die-Cast Aluminum Frame: Rigid basket construction resists flex at high excursion levels.
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Frequency Response – 25Hz to 400Hz: Full bass range from deep sub-bass to upper bass frequencies.
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Magnet – High Density Flux Ferrite: Powerful magnetic motor in a compact form factor.
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Cone – Polypropylene: Lightweight and stiff for accurate, responsive bass reproduction.
Advanced Technologies
A.I.R. – Air Intercooling Revolution: In a sealed enclosure, air compression during high-excursion movement generates heat that builds up in the voice coil and degrades performance over time. Hertz's A.I.R. technology manages this thermal environment directly, preventing the compression-related limitations that cause shallow subwoofers to lose output at sustained high volumes. The result is consistent, reliable performance even during long, demanding listening sessions — something that matters especially in a 2 Ohm setup where the amplifier is pushing harder.
Dedicated Suspension Support Structure: The MPS 300 S2 achieves its 88mm depth through a purpose-engineered suspension design. Hertz redesigned the spider and coil support structure with a dedicated support frame that allows the magnetic group to move inward, reducing overall depth while simultaneously increasing the linear excursion range. This is why the MPS 300 S2 achieves 20% more cone travel than a conventional shallow-mount design — it's a fundamental re-engineering of the driver architecture, not a compromise.
Non-Vented Rear Design: Most subwoofers require clearance behind the magnet for ventilation. The MPS 300 S2's non-vented rear eliminates this requirement entirely, meaning the enclosure can be built right up to the back of the driver. In pickup truck under-bench builds and other tight installations where every millimetre of depth counts, this makes a real practical difference.
2 Ohm Single Voice Coil: Running at 2 Ohm means the driver draws more current from the amplifier than a 4 Ohm equivalent. For amplifiers that are rated for higher power output at 2 Ohm — which is common in dedicated mono subwoofer amps — this translates directly into more output from the same amplifier. If your amp is 2 Ohm stable and you want to get the most from it, the S2 is the right choice over the S4.
EID – Scan, Discover, Identify: Hertz's EID system lets you scan the product to verify authenticity, access full specifications, and confirm compatibility. It's a quick way to check you have a genuine Hertz product and to pull up installation documentation on the spot.
Benefits
- 🔊 Deep, accurate 12-inch bass from a driver that's barely 3.5 inches deep
- ⚡ 2 Ohm load maximises output from compatible high-current amplifiers
- 📦 Fits in enclosures as small as 22.7 litres — no large box required
- 🌡️ A.I.R. technology keeps performance consistent at high volumes
- 🔧 Non-vented rear means shallower enclosure builds are possible
- 🛡️ Die-cast aluminum frame handles high-excursion loads without flex
- 🔌 8AWG spring-loaded terminals make wiring clean and secure
- ✨ Mesh grille included for a finished, professional install appearance
Who Should Buy the Hertz MPS 300 S2?
- Car audio enthusiasts running a 2 Ohm stable mono amplifier who want maximum output
- Pickup truck owners who want under-bench bass without a large enclosure
- Sedan and hatchback owners with shallow boot builds
- Installers building compact sealed enclosures in the 22–24 litre range
- Anyone upgrading from a 4 Ohm sub and wanting more output from the same amplifier
- Buyers who want Hertz Mille Pro quality in a space-saving, high-efficiency package
Technical Specifications
| Specification |
Value |
| Model |
MPS 300 S2 |
| Series |
Hertz Mille Pro |
| Size |
300 mm (12 in.) |
| Power Handling – Continuous |
500 W |
| Power Handling – Peak |
1000 W |
| Impedance |
2 Ohm |
| Voice Coil Type |
Single |
| Voice Coil Diameter |
38 mm (1.5 in.) – Six-Layer Copper |
| Frequency Response |
25 – 400 Hz |
| Depth |
88 mm (3.46 in.) |
| Xmech |
20 mm (0.79 in.) |
| Magnet Size (D × d × h) |
156 × 60 × 36 mm (6.14 × 2.36 × 1.42 in.) |
| Magnet Type |
High Density Flux Ferrite |
| Cone Material |
Polypropylene |
| Frame |
Die-Cast Aluminum |
| Terminals |
Solid Horizontal 8AWG Spring-Loaded |
| Recommended Enclosure Volume |
22.7 – 24 L (0.8 CF) Sealed |
| Weight |
6.64 kg (14.64 lb.) |
| Grille |
Screw-less Mesh Grille (Black Screws Included) |
Why Choose Dolphin Accessories?
- ✅ 100% Genuine Products – Every product is sourced directly from authorised distributors. No counterfeits, no grey imports.
- ✅ Expert Guidance – Our team knows car audio. We'll help you match the right amplifier, enclosure, and wiring for your specific vehicle and setup.
- ✅ Pan-India Delivery – We ship to every corner of India with careful, secure packaging so your gear arrives in perfect condition.
- ✅ Secure Packaging – Premium products get premium protection. Every order is packed to handle the journey.
- ✅ After-Sales Support – Questions after your purchase? We're here for installation tips, compatibility queries, and troubleshooting.
- ✅ Trusted by Enthusiasts – Thousands of car audio lovers across India rely on Dolphin Accessories for their upgrades.
Frequently Asked Questions
Q: What is the difference between the Hertz MPS 300 S2 and MPS 300 S4?
A: The only difference is impedance. The S2 runs at 2 Ohm and the S4 runs at 4 Ohm. The S2 is the better choice if your amplifier delivers more power at 2 Ohm, which is common with dedicated mono subwoofer amps. All other specs — size, depth, power handling, enclosure requirements — are identical.
Q: What amplifier power does the MPS 300 S2 need?
A: It handles 500W continuously at 2 Ohm. An amplifier rated between 300W and 500W RMS at 2 Ohm will drive it cleanly and reliably without risk of thermal damage.
Q: What enclosure size does the MPS 300 S2 need?
A: It's optimised for ultra-compact sealed enclosures starting from 22.7 litres (0.8 cubic feet). This makes it ideal for under-bench builds in pickup trucks and shallow boot installs in sedans and hatchbacks.
Q: What makes the MPS 300 S2 a shallow-mount subwoofer?
A: Its overall depth is just 88mm (3.46 inches). Hertz achieved this through a redesigned suspension structure that moves the magnetic group inward, reducing depth without sacrificing cone excursion.
Q: What is A.I.R. technology on the Hertz MPS 300 S2?
A: A.I.R. stands for Air Intercooling Revolution. It's a thermal management system that prevents heat buildup caused by air compression in sealed enclosures during high-power use, keeping the driver performing consistently at volume.
Q: Why does the 2 Ohm version produce more output than the 4 Ohm version?
A: At 2 Ohm, the driver draws more current from the amplifier. For amps that are rated for higher power at 2 Ohm — which most mono subwoofer amps are — this means more wattage delivered to the driver and more output overall.
Q: Can I install the MPS 300 S2 in a pickup truck under-bench enclosure?
A: Yes, that's one of the primary use cases Hertz designed this subwoofer for. The shallow depth and small enclosure requirement make it well-suited to under-bench builds where height and depth are both limited.
Q: What does the non-vented rear design mean?
A: It means the back of the driver doesn't require ventilation clearance. This allows the enclosure to be built right up to the rear of the magnet, enabling shallower overall box dimensions.
Q: What terminals does the MPS 300 S2 use?
A: It uses solid horizontal 8AWG spring-loaded terminals. These accept thick gauge wire and hold it securely, making for a clean, rattle-free connection.
Q: Does the Hertz MPS 300 S2 come with a grille?
A: Yes, a screw-less mesh grille is included along with black screws, giving the installation a clean, finished appearance.
Q: What is EID on Hertz products?
A: EID stands for Scan, Discover, Identify. It's Hertz's product authentication system — scan the EID code to verify the product is genuine and access its full specifications and documentation.
Q: Where can I buy the Hertz MPS 300 S2 in India?
A: You can buy it right here at Dolphin Accessories. We offer 100% genuine Hertz products with pan-India delivery, secure packaging, and dedicated after-sales support.
