Hertz MPS 250 S2 10-inch Peak 1000W Car Subwoofer

The Hertz MPS 250 S2 is for the car audio enthusiast who refuses to accept that limited space means limited bass. At just 82.6mm deep and working in sealed boxes as small as 12 litres, this 10-inch Mille Pro subwoofer fits where almost nothing else will. The 2 Ohm impedance makes it the natural partner for high-current mono amplifiers that deliver their best output at lower loads — so you get more from your amp and more from your install, without needing a bigger enclosure or a deeper boot.

What is the Hertz MPS 250 S2?

The MPS 250 S2 is a 10-inch shallow-mount subwoofer from Hertz's Mille Pro series. It shares the same ultra-shallow platform as the MPS 250 S4 but runs at 2 Ohm single voice coil impedance, making it the better choice for amplifiers that deliver higher output at lower loads. It handles 500W continuously and peaks at 1000W, with a depth of just 82.6mm (3.25 inches) and a recommended sealed enclosure volume of 12 to 14 litres (0.4 to 0.5 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 — all within one of the shallowest 10-inch driver profiles available.

Why Choose the Hertz MPS 250 S2?

• ✅ 2 Ohm impedance — draws more current from your amplifier for higher output efficiency
• ✅ Ultra-shallow 82.6mm depth — fits where standard 10-inch subs cannot
• ✅ Works in sealed enclosures as small as 12 litres — the tightest enclosure requirement in the Mille Pro range
• ✅ 1000W peak power from a driver barely 3.25 inches deep
• ✅ A.I.R. technology prevents thermal compression in small sealed enclosures
• ✅ 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

• Size – 250mm (10 inches): Compact driver diameter enabling under-seat and very shallow boot installations while still delivering genuine bass extension down to 25Hz.
• Power Handling – 500W Continuous / 1000W Peak: Handles serious amplifier output without distortion or thermal failure, despite the compact form factor.
• Impedance – 2 Ohm, Single Voice Coil: Lower impedance draws more current from the amplifier, increasing output — ideal for mono amps rated for higher power at 2 Ohm.
• Depth – 82.6mm (3.25 inches): One of the shallowest 10-inch subwoofers available, enabling installs that no standard driver could manage.
• Optimised Enclosure Volume – 12 to 14L (0.4 to 0.5 CF): Works in genuinely tiny sealed boxes, making it the right choice for under-seat builds and the tightest under-bench enclosures.
• Voice Coil – 38mm (1.5 in.) Six-Layer Copper: High thermal mass keeps the coil cool during extended high-power sessions, even in small enclosures where heat builds quickly.
• Xmech – 20mm (0.79 in.): 20% greater mechanical excursion than conventional shallow designs, delivering deeper bass from a smaller package.
• Non-Vented Rear Design: Eliminates rear ventilation clearance requirements, allowing the enclosure to be built right up to the back of the driver.
• 8AWG Spring-Loaded Terminals: Horizontal solid terminals accept thick gauge wire and hold it securely without loosening over time.
• Screw-less Mesh Grille: Included with black screws for a clean, professional finish.
• Die-Cast Aluminum Frame: Rigid basket construction resists flex at high excursion levels.
• Frequency Response – 25Hz to 400Hz: Full bass range from deep sub-bass to upper bass frequencies.
• Magnet – High Density Flux Ferrite: Powerful magnetic motor in a compact form factor.
• Cone – Polypropylene: Lightweight and stiff for accurate, responsive bass reproduction.

Advanced Technologies

A.I.R. – Air Intercooling Revolution: Small sealed enclosures create a particular thermal challenge. As the cone moves in and out at high excursion, it compresses the air inside the box, generating heat that accumulates in the voice coil and degrades performance over time. In a 12 to 14 litre box, this effect is more pronounced than in larger enclosures. Hertz's A.I.R. technology is designed specifically to manage this thermal environment, 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 in the tightest of enclosures.

Dedicated Suspension Support Structure: The MPS 250 S2 achieves its 82.6mm 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 250 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 between depth and performance.

Non-Vented Rear Design: Most subwoofers require clearance behind the magnet for ventilation. The MPS 250 S2's non-vented rear eliminates this requirement entirely, meaning the enclosure can be built right up to the back of the driver. In under-seat builds and pickup truck under-bench enclosures where every millimetre of depth counts, this makes a real practical difference to what's achievable.

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 maximise what it delivers, 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

• 🔊 Genuine 10-inch bass performance from a driver just 82.6mm deep
• ⚡ 2 Ohm load maximises output from compatible high-current amplifiers
• 📦 Fits in sealed boxes as small as 12 litres — the most compact enclosure requirement in the Mille Pro range
• 🌡️ A.I.R. technology keeps performance consistent even in very small enclosures 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 250 S2?

• Car audio enthusiasts running a 2 Ohm stable mono amplifier who want maximum output from a compact sub
• Car owners who want under-seat bass with no visible enclosure
• Pickup truck owners building under-bench enclosures with very limited height
• Hatchback and sedan owners with minimal boot depth available
• Installers building sealed enclosures in the 12 to 14 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 the most space-efficient, high-efficiency package possible

Technical Specifications

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 – Trusted by thousands of car audio enthusiasts across India for genuine products and expert support.

Frequently Asked Questions

Q: What is the difference between the Hertz MPS 250 S2 and MPS 250 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 is the difference between the MPS 250 S2 and MPS 300 S2?
A: The MPS 250 S2 is a 10-inch driver and the MPS 300 S2 is a 12-inch driver. The 250 S2 is shallower at 82.6mm versus 88mm and works in smaller enclosures from 12 litres versus 22.7 litres. Choose the 250 S2 when space is the absolute priority; choose the 300 S2 when you can accommodate a slightly larger box and want more low-frequency extension.

Q: What enclosure size does the MPS 250 S2 need?
A: It's optimised for ultra-compact sealed enclosures from 12 to 14 litres (0.4 to 0.5 cubic feet). This is one of the smallest enclosure requirements of any 10-inch subwoofer, making it ideal for under-seat and under-bench builds.

Q: What amplifier power does the MPS 250 S2 need?
A: It handles 500W continuously at 2 Ohm. An amplifier rated between 250W and 500W RMS at 2 Ohm will drive it cleanly and reliably without risk of thermal damage.

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: What is A.I.R. technology on the Hertz MPS 250 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. This is especially important in small 12 to 14 litre boxes where air compression is more pronounced than in larger enclosures.

Q: Can I install the MPS 250 S2 under the seat?
A: Yes. At 82.6mm (3.25 inches) deep and working in enclosures from 12 litres, it's designed precisely for under-seat installations. Whether it fits under your specific seat depends on the vehicle, but this is one of the shallowest 10-inch subwoofers available.

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 — critical for under-seat and under-bench builds.

Q: How does the MPS 250 S2 achieve 20% more excursion than traditional shallow designs?
A: Hertz redesigned the spider and coil support structure with a dedicated support frame that allows greater linear cone travel within the same shallow depth. This is what gives the MPS 250 S2 its depth-to-performance advantage over conventional shallow-mount drivers.

Q: What terminals does the MPS 250 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 250 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 250 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.