These midbass drivers deliver detailed, punchy low‑mid and woofer‑level performance when installed with solid damping and driven by a capable amplifier; they can require custom fitting and careful installation in many vehicles.
Buyer confidence
88%Highlights
- Neodymium magnet optimized with FEA simulations for real dynamics and utmost control.
- Very low carbon content CNC machined plates, for maximum magnetic permeability and low distortion at high power levels.
- Aluminium covered pole for a linear impedance modulation and low distortion.
- 50 mm CCAW double layer voice coil wound on a Polyamide former for exceptional power handling and compression-free re production even in the most demanding musical passages.
Key specs
Full specs- Component
- Woofer
- Size mm (in.)
- 180 (7)
- Power Handling - Continuous W
- 200
- Power Handling - Peak W
- 400
- Impedance Ohm
- 4
- Voice Coil Ø
- 50 (2)
- Frequency Response Hz
- 38 - 6k
- Magnet size D x d x h mm (in.)
- 90 x 60,7 x 5 (3.54 x 2.39 x 0.2)
Key specs
Full specs- Component
- Woofer
- Size mm (in.)
- 180 (7)
- Power Handling - Continuous W
- 200
- Power Handling - Peak W
- 400
Highlights
Overview- Neodymium magnet optimized with FEA simulations for real dynamics and utmost control.
- Very low carbon content CNC machined plates, for maximum magnetic permeability and low distortion at high power levels.
- Aluminium covered pole for a linear impedance modulation and low distortion.
Review highlights
Based on customer reviewsHertz ML 1800.3 LEGEND — powerful, detailed midbass
These midbass drivers deliver detailed, punchy low‑mid and woofer‑level performance when installed with solid damping and driven by a capable amplifier; they can require custom fitting and careful installation in many vehicles.
What buyers praise
- Very detailed, revealing low‑mid and bass response
- Delivers strong woofer‑level punch when properly amplified
What to watch for
- May need custom adapters or enclosures to fit some door locations
Overview
Key features
- Neodymium magnet optimized with FEA simulations for real dynamics and utmost control.
- Very low carbon content CNC machined plates, for maximum magnetic permeability and low distortion at high power levels.
- Aluminium covered pole for a linear impedance modulation and low distortion.
- 50 mm CCAW double layer voice coil wound on a Polyamide former for exceptional power handling and compression-free re production even in the most demanding musical passages.
- Exponential V-cone® with optimized geometry for utmost linearity and dispersion.
- “Boundary Free” IIR rubber surround, for better efficiency and wider mid-bass frequency.
- Pressed-pulp cone with cotton fibres, combining stiffness and lightweight, to achieve wide frequency response and limited break-ups at high frequency.
- Three-spoke, very acoustically transparent anti-resonant aluminium alloy basket featuring built-in venting holes.
- CNC machined elegant diamond-cut basket edge featuring the Hertz logo.
- Die-cast aluminium factory provided grille featuring diamond-cut aluminium Hertz logo.
- V-CONE®
- Boundary Free Surround
Technologies

V-CONE®
he exponential profile gets very close to the perfect one, providing exceptional dispersion.

Boundary Free Surround
This technology provides the ability to achieve wider emission surface of the cone compared to speakers with same
Specs
Technical Specs
| Component | Woofer |
| Size mm (in.) | 180 (7) |
| Power Handling - Continuous W | 200 |
| Power Handling - Peak W | 400 |
| Impedance Ohm | 4 |
| Voice Coil Ø | 50 (2) |
| Frequency Response Hz | 38 - 6k |
| Magnet size D x d x h mm (in.) | 90 x 60,7 x 5 (3.54 x 2.39 x 0.2) |
| Weight of one speaker kg (lb.) | 1,71 (3.77) |
| Magnet | Neodymium |
| Cone | Pressed-pulp cone with cotton fibres |
| Xmech mm (in.) | ±10 (0.4) |
Electro-acoustic Specs
| D mm | 149 |
| Re Ohm | 3,2 |
| Fs Hz | 60 |
| Le mH | 0,35 |
| Vas I | 12,2 |
| Mms g | 27,5 |
| Cms mm/N | 0,3 |
| BL T*m | 7,8 |
| Qts | 0,5 |
| Qes | 0,53 |
| Qms | 7,22 |
| Spl dB | 93 |
Physical Specs

| A | 184 mm | 7.24 in. |
| B | 160 mm | 6.3 in. |
| C | 88 mm | 3.46 in. |
| D | 76 mm | 3 in. |
| E | 189,2 mm | 7.45 in. |
| F | 27 mm | 1.06 in. |
Frequency response

Visual spec reference.
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Signori il Woofer 1970-01-01
Accessories

Grille
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