Hertz Mille Legend ML 2500.3

Hertz Mille Legend ML 2500.3 - 10-inch Subwoofer, 700 W RMS, 4 Ohm for Compact Sealed Enclosures

The Hertz Mille Legend ML 2500.3 is a 10-inch subwoofer that delivers tight, deep bass from small enclosures. Optimized for sealed 17–25-liter boxes, it provides controlled low-bass reproduction without dynamic compression – with 700 W RMS and 1400 W Peak and a usable frequency range of 27–500 Hz.

Technical Highlights

• Diameter: 10 inches (250 mm)
• Nominal power handling: 700 W RMS
• Peak power handling: 1400 W
• Impedance: 4 Ohm
• Frequency response: 27–500 Hz
• Voice coil: 100 mm (4 inches), CCAW
• Magnet: Neodymium, size (W×D×H): 95 × 28 × 6 mm
• Cone: pressed paper pulp with mineral additives
• Xmech: ±27 mm
• Weight: 7.5 kg

Electro-acoustic Data

• Effective cone diameter (D): 212.5 mm
• Xmax: 17 mm
• Re: 2.75 Ohm
• Fs: 33 Hz
• Le: 1.05 mH
• Vas: 23.5 l
• Mms: 175 g
• Cms: 0.125 mm/N
• BL: 12.6 T·m
• Qts: 0.63 | Qes: 0.65 | Qms: 7.5
• Sensitivity: 88 dB

Dimensions (Chassis)

• A: 268 mm
• B: 234 mm
• C: 159 mm
• D: 137 mm
• E: 274 mm
• F: 50 mm

Enclosure Suggestions (Sealed)

Sealed – Compact (17 Liters): Best ratio of performance and space requirement; ideal for side compartments or small boxes.

• Vb: 17 l (0.6 cu.ft.)
• Fb: 49 Hz
• Qtc: 0.89
• Outer dimensions (W × H × D): 350 × 300 × 250 mm
• Mounting cut-out: 235 mm
• Wood thickness: 19 mm

Panel cutting list – 17 l:

• A: 350 × 300 mm – Quantity 2
• B: 350 × 212 mm – Quantity 2
• C: 262 × 212 mm – Quantity 2

Sealed – Performance (25 Liters): For particularly deep, controlled bass. For clean reproduction in the lowest bass, a subsonic filter at approx. 10 Hz (24 dB/Oct.) is recommended.

• Vb: 25 l (0.88 cu.ft.)
• Fb: 42.5 Hz
• Qtc: 0.80
• Outer dimensions (W × H × D): 400 × 350 × 260 mm
• Mounting cut-out: 235 mm
• Wood thickness: 19 mm

Panel cutting list – 25 l:

• A: 400 × 350 mm – Quantity 2
• B: 400 × 222 mm – Quantity 2
• C: 312 × 222 mm – Quantity 2

Construction & Features

• Large neodymium motor, FEA optimized for stable magnetic field even at high excursions.
• CNC-machined, low-carbon steel plates for high magnetic conductivity and low distortion.
• Compact internal magnet structure with high efficiency/power ratio.
• 100 mm CCAW voice coil with high power handling (music power up to 1400 W) to reduce thermal compression.
• In/Out winding for uniform cooling of all layers.
• TIL voice coil former (fiberglass composite): combines heat dissipation of aluminum with the rigidity of polyamide.
• Aluminum shorting ring on the pole piece to minimize nonlinear distortion and for extended low bass.
• "Boundary Free" rubber surround for higher SPL with the same outer diameter.
• Exponential V-cone with optimized geometry for high rigidity at maximum excursion.
• Mineral-reinforced paper cone for a high ratio of stiffness and damping.
• Resonance-free die-cast aluminum basket with ventilation under the spider.
• Precision-machined trim ring (Diamond Cut) with Hertz branding.
• Parameters designed for sealed enclosures between 17 and 25 liters – efficient and space-saving.

Installation & Compatibility

The ML 2500.3 operates at 4 Ohm and is ideally suited for amplifiers with 600–900 W RMS at 4 Ohm in terms of power. In compact, sealed enclosures, it plays controlled and precise. Ensure solid screwing, a tightly sealing baffle, and sufficient cross-section for the supply line (at least 4 mm²). For the 25-liter version, a subsonic filter at approx. 10 Hz (24 dB/Oct.) is recommended.