Hertz ML 700.3 Legend 3" Midrange Car Speaker

When you're building a competition-grade 3-way car audio system, the midrange driver is where the system either comes together or falls apart. The Hertz ML 700.3 Legend was designed specifically for this role — to sit between the ML 1800.3 Legend woofer and a high-end tweeter and deliver the kind of midrange clarity, extension, and control that wins competitions and satisfies the most demanding listeners. Every technology in this speaker, from the FEA-optimised neodymium magnet to the CONEX spider and the Boundary Free IIR surround, exists to serve one goal: the most accurate, extended, and distortion-free midrange reproduction possible in a 3" driver.

What is this Product?

The Hertz ML 700.3 Legend is a 3" (70 mm) car audio midrange speaker from Hertz's flagship Legend series. It handles 100W peak power (Hi-Pass filtered at 250 Hz, 12 dB/oct) at 4 Ohm impedance and covers a frequency range of 200 Hz to 20,000 Hz. The speaker is built around a neodymium magnet optimised with FEA (Finite Element Analysis) simulation, CNC machined low-carbon plates, a pure copper-covered central pole, an Exponential V-cone® pressed-pulp cotton-fibre cone, a CONEX spider, and a Boundary Free IIR rubber surround. The Boundary Free surround extends the effective emission diameter from 60 mm to 65 mm, giving the driver a wider emission surface and deeper low-frequency extension than a conventional 3" midrange. A die-cast aluminium grille with a diamond-cut Hertz logo is included.

Why Choose This Product?

• ✅ Flagship Legend series — Hertz's highest-tier car audio midrange driver
• ✅ FEA-optimised neodymium magnet with CNC machined low-carbon plates for superior dynamics and minimal distortion
• ✅ Boundary Free IIR surround extends emission diameter from 60 to 65 mm for deeper, more controlled bass extension
• ✅ Exponential V-cone® geometry for maximum linearity and off-axis dispersion across the midrange band
• ✅ CONEX spider for maximum acoustic transparency at mid-high frequencies
• ✅ Pure copper-covered central pole for wider high-frequency extension and lower distortion
• ✅ FEA-optimised cone-to-former junction for more integral coupling and extended high-frequency reach
• ✅ Three-spoke acoustically transparent anti-resonant aluminium alloy basket with venting holes
• ✅ Designed specifically to pair with the Hertz ML 1800.3 Legend woofer for competition 3-way systems
• ✅ Die-cast aluminium diamond-cut grille included

Key Features

• Component Type: Midrange — designed for use as the mid driver in a 3-way component system
• Speaker Size: 70 mm (3") — standard 3" midrange mounting diameter
• Peak Power: 100W — rated with Hi-Pass filter at 250 Hz, 12 dB/oct
• Impedance: 4 Ohm — compatible with most aftermarket amplifiers
• Frequency Response: 200 Hz to 20,000 Hz — full midrange through extended upper-midrange
• Voice Coil Diameter: 20 mm (0.8") single-layer mobile coil
• Magnet Type: Neodymium — FEA-optimised for superior dynamics and control
• Magnet Size (D × d × h): 45 × 25 × 3.5 mm (1.77 × 0.98 × 0.13")
• Central Pole: Extremely pure copper-covered — for wider high-frequency extension
• Plates: CNC machined, very low carbon content — maximum magnetic permeability, low distortion
• Cone Material: Pressed-pulp with cotton fibres — stiff yet lightweight
• Cone Profile: Exponential V-cone® — geometrically optimised for linearity and dispersion
• Spider: CONEX — optimised profile for maximum acoustic transparency at mid-high frequencies
• Surround: Boundary Free IIR rubber — extends emission diameter from 60 to 65 mm
• Basket: Three-spoke acoustically transparent anti-resonant aluminium alloy with venting holes
• Basket Edge: CNC machined diamond-cut with Hertz logo
• Weight (per speaker): 0.21 kg (0.46 lbs)
• Grille: Die-cast aluminium with diamond-cut Hertz logo — included

Advanced Technologies

FEA-Optimised Neodymium Magnet with CNC Machined Low-Carbon Plates: Hertz used Finite Element Analysis (FEA) simulation to design the magnetic circuit of the ML 700.3 Legend from scratch. FEA allows engineers to model the magnetic field in three dimensions before any physical prototype is built, identifying and eliminating sources of non-linearity and distortion in the design. The neodymium magnet delivers a far stronger magnetic field per unit of weight than a ferrite magnet, keeping the speaker compact and lightweight. The CNC machined plates use very low carbon content iron, which maximises magnetic permeability — meaning more of the magnet's energy is directed into moving the voice coil rather than being lost as heat or distortion. The result is a motor system with exceptional dynamic control and very low distortion even at high power levels.

Pure Copper-Covered Central Pole for Extended High-Frequency Response: The central pole piece is coated with extremely pure copper. This is a technique borrowed from high-end home audio driver design. Copper has a much lower electrical resistivity than iron, and coating the pole reduces the inductance modulation that occurs as the voice coil moves. In practice, this means the speaker's impedance stays more consistent across the frequency range, which reduces a common source of high-frequency distortion and allows the driver to extend further into the upper midrange and lower treble. This is one of the key reasons the ML 700.3 Legend reaches 20 kHz — an unusually wide response for a 3" midrange.

Exponential V-Cone® with FEA-Optimised Cone-to-Former Junction: The V-cone® is Hertz's proprietary cone geometry, shaped to optimise both linearity and off-axis dispersion. In a midrange speaker, off-axis dispersion is critical because the driver is rarely pointing directly at the listener. The V-cone® ensures the sound spreads evenly across the cabin. Hertz also applied FEA methods to optimise the geometry of the junction between the cone and the voice coil former — a detail that most manufacturers overlook. A better-coupled junction means the cone and former move as a single rigid unit rather than flexing at the join, which extends the speaker's usable high-frequency range and reduces break-up distortion.

CONEX Spider for Acoustic Transparency: The spider is the flexible component that centres the voice coil in the magnetic gap and controls its return motion. Most spiders are made from treated fabric, which can absorb and colour the sound at mid-high frequencies. The ML 700.3 Legend uses a CONEX spider — a material chosen specifically for its acoustic transparency and optimised profile. This means the spider does its mechanical job without adding colouration or damping to the midrange signal, keeping the sound clean and open across the full frequency range.

Boundary Free IIR Rubber Surround (60 mm to 65 mm Emission Diameter): The Boundary Free surround is Hertz's proprietary design that allows the cone to travel further than a conventional surround without losing symmetry or stability. In the ML 700.3 Legend, this surround also increases the effective emission diameter of the cone from 60 mm to 65 mm. A larger emission surface moves more air, which means the speaker produces more acoustic pressure at low frequencies — extending the driver's usable low-frequency reach and allowing it to blend more smoothly with the ML 1800.3 Legend woofer below it. This is particularly important in a competition system where the crossover region between woofer and midrange must be seamless.

Three-Spoke Acoustically Transparent Anti-Resonant Aluminium Alloy Basket: The basket is the structural frame of the speaker. Most baskets are stamped steel, which is prone to resonance at certain frequencies. The ML 700.3 Legend uses a die-cast aluminium alloy basket with a three-spoke design that minimises the material between the cone and the surrounding air, reducing back-pressure and allowing the cone to breathe freely. Built-in venting holes further reduce air turbulence behind the cone. The anti-resonant design means the basket itself doesn't add any colouration to the sound — what you hear is the driver, not the frame.

Benefits

• 🎵 Vocals and instruments reproduced with the accuracy and texture of a live performance
• 🔊 Extended response to 20 kHz — unusually wide for a 3" midrange, reducing the load on the tweeter
• ⚡ Deep, controlled low-frequency extension for a seamless blend with the ML 1800.3 Legend woofer
• 🏆 Competition-grade engineering — built for systems that need to perform at the highest level
• 🔧 Acoustically transparent basket and CONEX spider keep the sound clean and uncoloured
• 💎 Die-cast aluminium diamond-cut grille included — premium finish to match the premium performance
• 🎯 Lightweight at 0.21 kg — easy to mount in dashboards, A-pillars, or door panel midrange locations

Who Should Buy This Product?

• Car audio enthusiasts building a competition-grade 3-way system with the Hertz ML 1800.3 Legend woofer and a high-end tweeter
• Listeners who want the absolute best midrange performance available in a 3" driver from the Hertz lineup
• Competition car audio participants who need a midrange driver that scores on accuracy, extension, and dynamics
• Anyone who has already invested in the Hertz Legend series and wants a midrange driver that matches the quality of the rest of the system
• Installers who need a 3" midrange with a wide frequency response (200 Hz to 20 kHz) to minimise the demands on the tweeter crossover point

Technical Specifications

Why Choose Dolphin Accessories?

• ✅ 100% Genuine Products — Every product is sourced directly from authorised Hertz distributors. No counterfeits, no grey-market imports, ever.
• ✅ Expert Guidance — Our team understands competition-level 3-way system design. We can help you match the ML 700.3 Legend to the right woofer, tweeter, crossover, and amplifier for your specific build.
• ✅ Pan-India Delivery — We ship to every part of India, with packaging designed to protect precision Legend series components throughout transit.
• ✅ Secure Packaging — Flagship-level drivers deserve flagship-level packing. Every order is packed carefully to arrive in perfect condition.
• ✅ After-Sales Support — Questions about crossover settings, mounting location, or system integration after your purchase? Our team is here to help.
• ✅ Trusted by Enthusiasts — From daily drivers to competition builds, thousands of car audio enthusiasts across India trust Dolphin Accessories for their upgrades.

Frequently Asked Questions

Q: What size is the Hertz ML 700.3 Legend?
A: It is a 3" (70 mm) midrange speaker, designed to fit standard 3" midrange mounting locations in dashboards, A-pillars, or door panels.

Q: What is the power handling of the Hertz ML 700.3 Legend?
A: It handles 100W peak power when used with a Hi-Pass filter set at 250 Hz with a 12 dB/octave slope. The high-pass filter is essential — it protects the small cone from low-frequency signals that could cause damage.

Q: What frequency range does the ML 700.3 Legend cover?
A: It covers 200 Hz to 20,000 Hz. The 20 kHz upper limit is unusually wide for a 3" midrange and is made possible by the copper-covered central pole and the FEA-optimised cone-to-former junction. This wide response reduces the demands on the tweeter crossover point.

Q: What is the difference between the Hertz ML 700.3 Legend and the MP 70.3 PRO?
A: The ML 700.3 Legend is from Hertz's flagship Legend series, while the MP 70.3 PRO is from the MPX Pro series. The Legend features additional technologies including a CONEX spider, a copper-covered central pole, CNC machined low-carbon plates, an FEA-optimised cone-to-former junction, and the Boundary Free IIR surround that extends the emission diameter from 60 to 65 mm. It is designed for competition-grade systems and pairs specifically with the ML 1800.3 Legend woofer.

Q: What woofer does the ML 700.3 Legend pair with?
A: It is designed to pair with the Hertz ML 1800.3 Legend woofer as part of an ultra-high-performance competition 3-way system. The Boundary Free surround on the ML 700.3 Legend extends its low-frequency reach specifically to blend seamlessly with the ML 1800.3 Legend below it.

Q: What is the Boundary Free IIR surround and what does it do for this speaker?
A: The Boundary Free IIR surround is Hertz's proprietary rubber surround design that allows greater cone excursion than a conventional surround. In the ML 700.3 Legend, it also increases the effective emission diameter of the cone from 60 mm to 65 mm, giving the driver a larger radiating surface and deeper low-frequency extension — critical for a smooth crossover blend with the woofer.

Q: What is the CONEX spider and why is it used?
A: The CONEX spider is the flexible component that centres the voice coil in the magnetic gap. It is chosen for its acoustic transparency — it does its mechanical job without absorbing or colouring the midrange signal. This keeps the sound clean and open across the full frequency range of the driver.

Q: Why does the ML 700.3 Legend have a copper-covered central pole?
A: The copper coating on the central pole reduces inductance modulation as the voice coil moves, which keeps the speaker's impedance more consistent across the frequency range. This reduces a common source of high-frequency distortion and is one of the key reasons the ML 700.3 Legend can extend to 20 kHz.

Q: Do I need a crossover for the Hertz ML 700.3 Legend?
A: Yes. The ML 700.3 Legend must be used with a high-pass filter set at 250 Hz (12 dB/oct) to protect it from low-frequency signals. This can be provided by a passive crossover, an active crossover in your amplifier, or a DSP processor.

Q: What is the impedance of the Hertz ML 700.3 Legend?
A: The impedance is 4 Ohm, which is standard for aftermarket car audio amplifiers and compatible with most multi-channel amplifier setups.

Q: Does the Hertz ML 700.3 Legend come with a grille?
A: Yes, a die-cast aluminium grille with a diamond-cut Hertz logo is included in the box.

Q: How do I buy the Hertz ML 700.3 Legend from Dolphin Accessories?
A: Add it to your cart and place your order online. We offer pan-India delivery with secure packaging. If you need help with system matching, crossover settings, or installation advice, our team is ready to assist before and after your purchase.