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ML 2500.3 LEGEND 250 (10) mm (in.) | Subwoofers | 1400 W | 4 Ohm

Music fans who attend live concerts know well the emotions that low undistorted frequencies without dynamic compression can arouse. For this reason, the HertzAudioVideo R&D created ML 2500.3 Legend car audio subwoofer. During the long development phase, the designers set themselves just one ambitious goal: to transfer the emotions of a live performance to the car environment. Thanks to a completely renewed design, ML2500.3 car audio subwoofers have extremely compact size and are optimized to play in enclosures with reduced boxes. This choice of design combines two requirements hard to achieve up to now: reference performance and ease of installation.
Size mm (in.) 250 (10)
Power Handling - Continuous W 700
Power Handling - Peak W 1400
Impedance Ohm 4
No Filter Component Subwoofers
Voice Coil Ø 100 (4)
Frequency Response Hz 27 ÷ 500
Magnet size D x d x h mm (in.) 95 x 28 x 6 D x d x h (in.) (3.7 x 1.1 x 0.24)
Weight of one component kg (lb.) 7,5 (16.53)
Magnet Neodymium
Cone Pressed-pulp cone with mineral powders
Xmech mm (in.) ±27 (1.06)
Technical Specs
D mm 212,5
Xmax mm 17
Re Ohm 2,75
Fs Hz 33
Le mH 1,05
Vas I 23,5
Mms g 175
Cms mm/N 0,125
BL T*m 12,6
Qts 0,63
Qes 0,65
Qms 7,5
Spl dB 88
Electro-acoustic Specs
Physical Specs
ML 2500.3 LEGEND
A 268 mm 10.55 in.
B 234 mm 9.21 in.
C 159 mm 6.26 in.
D 137 mm 5.4 in.
E 274 mm 10.78 in.
F 50 mm 1.97 in.
Frequency response
ML 2500.3 LEGEND
Sealed - Compact
17 Liters - 0.6 Cubic Feet

Best performance / space ratio. Enclosure size similar to that of a side trunk installation.

ML 2500.3 LEGEND ML 2500.3 LEGEND
Box Tech Data - Sealed Compact
Vb l(cu.ft.) 17 (0.6)
Fb Hz 49
Qtc 0,89
W mm(in.) 350 (13.78)
H mm(in.) 300 (11.81)
D mm(in.) 250 (9.84)
Mounting Hole - M 235 (9.25)
Wood Thickness 19 (0.75)
Panels Cut List - Sealed Compact
A mm(in.) 350 x 300 (13.78 x 11.81) Qty 2
B mm(in.) 350 x 212 (13.78 x 9.84) Qty 2
C mm(in.) 262 x 212 (11.81 x 9.84) Qty 2
Sealed - Performance
25 Liters - 0.88 Cubic Feet

Suggested for a tight yet solid audiophile bass. Use of subsonic filter is advisable for clean reproduction in the lower range (10Hz – 24 dB Oct.)

ML 2500.3 LEGEND ML 2500.3 LEGEND
Box Tech Data - Sealed Performance
Vb l(cu.ft.) 25 (0.88)
Fb Hz 42,5
Qtc 0,80
W mm(in.) 400 (15.75)
H mm(in.) 350 (13.78)
D mm(in.) 260 (10.24)
Mounting Hole - M 235 (9.25)
Wood Thickness 19 (0.75)
Panels Cut List - Sealed Performance
A mm(in.) 400 x 350 (15.75 x 13.78) Qty 2
B mm(in.) 400 x 222 (15.75 x 10.24) Qty 2
C mm(in.) 312 x 222 (13.78 x 10.24) Qty 2
ML 2500.3 LEGEND

Die-cast aluminium optional grille featuring diamond-cut aluminium Hertz logo.

ML 2500.3 LEGEND

Full metal sturdy structure composed by a solid cast aluminium ring and a steel mesh black grille featuring an elegant diamond-cut Hertz Logo
Mounting screws totally hidden for a superior integration within the car cabin.

ML 2500.3 LEGEND

1. Extraordinary large neodymium magnet, optimized with FEA simulations, to ensure magnetic field stability even under high excursion.
2. Very low carbon content CNC machined plates, for maximum magnetic permeability and low distortion at high power levels.
3. Voice coil internal magnet with high size / performance ratio, for maximum efficiency.
4. CCAW, 100 mm (4”) voice coil, capable of handling 1400 W musical power, keeping the working temperature very low, reducing dynamic compression to the minimum.
5. Voice coil wound with In/Out method, for even cooling of the different coil layers.
6. Voice coil wound on TIL former: this material made from fibreglass combines the heat dissipation properties of aluminium with the stiffness of Polyamide composites, for a no-compromise acoustic performance.
7. Central pole featuring “Aluminium Shorting Ring”, for minimum distortion and maximum extension at low frequency.
8. “Boundary Free” IIR rubber surround, for higher SPL performance than other subwoofers with same external diameter.
9. Exponential V-cone® with optimized geometry for high cone stiffness and strong resistance to deformation even at maximum excursions.
10. Mineral-injected paper cone, for superior rigidity and damping.
11. Very acoustically transparent anti-resonant aluminium alloy basket featuring six-spoke self-standing structure and built-in venting holes underneath the spider.
12. CNC machined elegant diamond-cut basket edge featuring the Hertz logo.
13. Ergonomic, ultra-compact design, with array of electro-acoustic parameters optimized for sealed box application with 17 – 25 lt volume.

ML 2500.3 LEGEND

The V-CONE® profile prevents the cone from deforming during
its course, ensuring that the “piston” works in a correct position,
maximizing the production of acoustic pressure.

ML 2500.3 LEGEND
Boundary Free Surround

This technology provides the ability to achieve wider emission surface of the cone compared to speakers with same diameter; that way, the cone manages to move a bigger mass of air, so it produces more acoustic pressure. This special surround is built from highly pure IIR butyl rubber, ensuring extraordinary thermal and mechanical linearity.