Hertz MP 300 D4.3 Pro 12" 1200W Peak Car Subwoofer
The Hertz Mille Pro series was built on a simple idea: take the technologies that made the Legend line famous, refine the production process, and make that level of performance accessible to a wider audience. The MP 300 D4.3 Pro is the 12-inch flagship of that effort. It delivers deep, controlled, high-output bass in a compact sealed enclosure, with a dual voice coil configuration that gives you the flexibility to wire it to virtually any amplifier setup — including 1 Ohm stable systems. If you want serious bass without the complexity of a large enclosure, this is a strong contender.
What is the Hertz MP 300 D4.3 Pro?
The MP 300 D4.3 Pro is part of Hertz's Mille Pro subwoofer range — a line that sits directly below the flagship Legend series and shares many of its core technologies. It features a 300mm (12-inch) driver with 1200W peak power handling, a high-density ferrite magnet motor, and a 65mm 4-layer CCAW dual voice coil wound on a TIL-P former. The 4+4 Ohm DVC configuration allows you to wire it at 2 Ohm (parallel) or 8 Ohm (series), giving you maximum flexibility when matching to your amplifier. The design is optimised for sealed enclosures starting from 27 litres, making it practical for most car boot installations.
Why Choose the Hertz MP 300 D4.3 Pro?
- ✅ Mille Pro series — shares core technologies with the flagship Legend line
- ✅ 1200W peak power handling from a compact 12-inch driver
- ✅ 4+4 Ohm DVC — wire at 2 Ohm, 8 Ohm, or run two subs at 1 Ohm for maximum flexibility
- ✅ Boundary Free IIR rubber surround for higher SPL at the same external diameter
- ✅ Exponential V-cone® for high cone stiffness and distortion-free bass at maximum excursion
- ✅ Advanced air cooling system — keeps voice coil temperature low even under extreme musical programs
- ✅ 8 AWG terminal block with anti-short circuit cover — built for low-impedance wiring
- ✅ CNC diamond-cut basket edge with Hertz logo — premium finish
Key Features
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300mm (12") Driver Size — A full-size 12-inch subwoofer that delivers deep, authoritative bass in sealed enclosures from 27 litres.
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1200W Peak / 600W Continuous Power — Handles serious amplifier power with headroom to spare.
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4+4 Ohm Dual Voice Coil (DVC) — Wire in parallel for 2 Ohm, in series for 8 Ohm, or combine two subs for 1 Ohm — compatible with virtually any amplifier.
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65mm (2.5") 4-Layer CCAW Voice Coil — Copper-clad aluminium wire with four layers for high power handling and low operating temperature.
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TIL-P Former with Venting Holes — Combines efficient heat dissipation with a high Qms factor (low mechanical loss) for dynamic, punchy bass.
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High-Density Ferrite Magnet (165 x 75 x 35mm) — A large, powerful motor that maximises magnetic flux density and minimises saturation risk.
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Exponential V-cone® — Optimised cone geometry for maximum stiffness and resistance to deformation at full ±27mm excursion.
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Mineral-Injected Water-Repellent Paper Cone — Superior rigidity and damping for accurate, controlled bass reproduction.
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Boundary Free IIR Rubber Surround — Delivers higher SPL than conventional surrounds of the same external diameter.
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Anti-Resonant Aluminium Alloy Basket — Six-spoke self-standing structure with built-in venting holes beneath the spider for thermal management.
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Advanced Air Cooling System — No centre hole required on the bottom plate; instead, 10 vents on the bottom plate and holes behind the voice coil winding force air through the gap to keep coil temperature low.
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8 AWG Terminal Block — Solid push connectors with anti-short circuit cover for ultra-low wiring resistance in 1 Ohm configurations.
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Wall-Mount Installation Compatible — Can be secured directly to the box wall, taking full advantage of its compact dimensions.
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Frequency Response: 30–500 Hz — Deep sub-bass through upper bass with authority.
Advanced Technologies
Exponential V-cone® Geometry: The cone follows an exponential V-profile that has been mathematically optimised for maximum stiffness-to-weight ratio. This prevents the cone from flexing or deforming at the full ±27mm mechanical excursion, preserving bass accuracy and keeping distortion low at all output levels. The same construction technique — pressing paper pulp with mineral powder injection — is used in the flagship Legend line.
Boundary Free IIR Rubber Surround: The Integrated Inner Roll surround design removes the traditional boundary constraints of the surround, allowing the cone to travel further and more freely. This translates directly into higher SPL output compared to conventional subwoofers of the same external diameter — you get more bass from the same size driver. The high-purity IIR-butyl rubber material ensures long-term durability and consistent performance.
TIL-P Voice Coil Former with Advanced Air Cooling: The voice coil is wound on a TIL-P former with venting holes behind the winding. This material combines efficient heat dissipation with a high Qms factor (low mechanical loss), which contributes to the subwoofer's dynamic, punchy character. The innovative air cooling system forces air through the gap between the voice coil and the pole piece via 10 vents on the bottom plate, keeping the coil operating temperature low even during the most demanding musical programs — without requiring a centre hole on the bottom plate.
4+4 Ohm DVC Configuration: The dual voice coil design gives you wiring flexibility that a single voice coil subwoofer simply cannot match. Wire the two coils in parallel for 2 Ohm, in series for 8 Ohm, or combine two MP 300 D4.3 units wired in parallel to present a 1 Ohm load to your amplifier. The 8 AWG terminal block with anti-short circuit cover is specifically designed to handle the low-resistance wiring demands of 1 Ohm configurations.
Benefits
- 🎵 Deep, powerful bass from a compact sealed enclosure — starting at just 27 litres
- ⚡ 1200W peak power handling — built for high-output amplifier systems
- 🔌 Maximum amplifier compatibility — DVC 4+4 Ohm works with virtually any mono or multi-channel amp
- 🔇 Low distortion at maximum excursion — clean, accurate bass at all volume levels
- 🌡️ Advanced air cooling keeps performance consistent during long, high-power listening sessions
- 🏆 Mille Pro series — Legend-derived technologies at a more accessible price point
- 🔩 Premium CNC diamond-cut basket — looks as good as it performs
- 📦 Wall-mount installation option — saves space and simplifies enclosure builds
Who Should Buy the Hertz MP 300 D4.3 Pro?
- Car audio enthusiasts who want Mille Pro-grade bass performance with flexible wiring options
- Installers and system builders who need a 12-inch DVC subwoofer for 1 Ohm, 2 Ohm, or 8 Ohm amplifier configurations
- Music lovers upgrading from entry or mid-level subwoofers to a performance-oriented driver
- Anyone who wants deep, high-output bass in a sealed enclosure without needing a massive box
- Enthusiasts who want Legend-derived technology at a more accessible price point
Technical Specifications
| Specification |
Value |
| Model |
Hertz MP 300 D4.3 Pro |
| Series |
Mille Pro |
| Driver Size |
300 mm (12 inch) |
| Power Handling – Continuous |
600 W |
| Power Handling – Peak |
1200 W |
| Impedance |
4+4 Ohm (Dual Voice Coil) |
| Voice Coil Diameter |
65 mm (2.5 inch) |
| Voice Coil Layers |
4 |
| Voice Coil Material |
CCAW (Copper-Clad Aluminium Wire) |
| Voice Coil Former |
TIL-P with venting holes |
| Magnet Type |
High-density flux ferrite |
| Magnet Size (D x d x h) |
165 x 75 x 35 mm (6.5 x 2.95 x 1.38 in) |
| Mechanical Excursion (Xmech) |
±27 mm (±1.06 in) |
| Cone Material |
Water-repellent mineral-injected pressed paper |
| Surround Type |
Boundary Free IIR Rubber |
| Basket Material |
Anti-resonant aluminium alloy (6-spoke) |
| Recommended Enclosure |
Sealed box, from 27 litres |
| Terminal |
Push connectors, up to 8 AWG, anti-short circuit cover |
| Component Weight |
8.63 kg (19.03 lb) |
Why Choose Dolphin Accessories?
- ✅ 100% Genuine Products — Every product we sell is sourced directly from authorised distributors. No counterfeits, no compromises.
- ✅ Expert Guidance — Our team understands car audio. We help you choose the right subwoofer, amplifier, and enclosure for your specific vehicle and listening preferences.
- ✅ Pan-India Delivery — We ship to every corner of India, with careful packaging to ensure your equipment arrives in perfect condition.
- ✅ Secure Packaging — Premium car audio equipment deserves premium protection. Every order is packed to withstand the journey.
- ✅ After-Sales Support — Have a question after your purchase? Our team is here to help with installation advice, compatibility queries, and more.
- ✅ Trusted by Enthusiasts — Dolphin Accessories is the go-to destination for serious car audio enthusiasts across India.
Frequently Asked Questions
Q: What does DVC 4+4 Ohm mean on the Hertz MP 300 D4.3 Pro?
A: DVC stands for Dual Voice Coil. The MP 300 D4.3 has two separate voice coils, each rated at 4 Ohm. You can wire them in parallel for a 2 Ohm load, in series for an 8 Ohm load, or combine two subs wired in parallel to present a 1 Ohm load to your amplifier.
Q: What amplifier power does the Hertz MP 300 D4.3 Pro need?
A: The MP 300 D4.3 handles 600W continuous and 1200W peak. For best results, pair it with a mono amplifier rated between 400W and 800W RMS at your chosen impedance (2 Ohm or 8 Ohm).
Q: What size enclosure does the Hertz MP 300 D4.3 Pro need?
A: It is optimised for sealed (closed) enclosures starting from 27 litres. This is relatively compact for a 12-inch subwoofer, making it practical for most car boot installations.
Q: Can I wire the Hertz MP 300 D4.3 Pro to 1 Ohm?
A: Yes, but not with a single unit. If you use two MP 300 D4.3 subwoofers and wire all four voice coils in parallel, you get a 1 Ohm load. The 8 AWG terminal block is specifically designed to handle the low-resistance wiring demands of 1 Ohm configurations.
Q: What is the difference between the Hertz Mille Pro and Mille Legend series?
A: The Legend series (ML 2000.3, ML 2500.3) is Hertz's flagship subwoofer line, featuring neodymium magnets and the most advanced motor systems. The Mille Pro series shares many of the same core technologies — V-cone®, Boundary Free surround, TIL former, mineral-injected cone — but uses a high-density ferrite magnet motor, making it a more accessible option without sacrificing the fundamental acoustic character of the Legend line.
Q: What is the Exponential V-cone® on the MP 300 D4.3?
A: The V-cone® is a specially shaped cone with an exponential profile that maximises stiffness while minimising weight. This prevents the cone from flexing or deforming at high excursion levels, keeping bass reproduction accurate and distortion-free even at maximum output.
Q: What is the maximum excursion of the Hertz MP 300 D4.3 Pro?
A: The mechanical excursion (Xmech) is ±27mm (±1.06 inches), which is very high for a 12-inch subwoofer and contributes to its ability to produce deep, high-output bass in a compact sealed enclosure.
Q: Can I install the Hertz MP 300 D4.3 Pro directly on the box wall?
A: Yes. The design specifically allows for wall-mount installation. A damping rubber disk is provided with the product to secure the subwoofer to the box wall and ensure air exchange through the 10 vents on the bottom plate.
Q: Why does the MP 300 D4.3 Pro not have a centre hole on the bottom plate?
A: The advanced air cooling system uses 10 vents on the bottom plate and holes behind the voice coil winding to force air through the gap and cool the coil. This approach provides better thermal inertia, maximises the magnetic field in the pole, and allows wall-mount installation — three advantages over a traditional centre-hole design.
Q: What cable size does the terminal block on the MP 300 D4.3 Pro accept?
A: The terminal block accepts cables up to 8 AWG and includes an anti-short circuit cover. This is important for low-impedance (1 Ohm) wiring configurations where cable resistance can significantly affect performance.
Q: Does Dolphin Accessories provide installation support for the Hertz MP 300 D4.3 Pro?
A: Yes. Our team can guide you on amplifier matching, enclosure sizing, and wiring configurations. Reach out to us before or after your purchase for personalised advice.
Q: Is the Hertz MP 300 D4.3 Pro covered by a warranty?
A: Yes, it comes with the standard Hertz manufacturer warranty. Please contact Dolphin Accessories after your purchase for warranty registration and support details.
