The Mille Pro MPS 250 S4/S2, manufactured by the renowned audio maker Hertz, is a 10-inch flat subwoofer known for its impressive performance despite its slim design. This subwoofer is optimized for use in ultra-compact, sealed enclosures and delivers exceptional power despite limited space. Its special design allows it to achieve high performance even under challenging installation conditions, such as under the rear seat of pickups. With a cone excursion capacity 20% higher than conventional designs, this subwoofer offers a depth-to-power ratio that is unmatched.

FEATURES

• Ultra-flat mounting (83.6 mm / 3.35 inches)
• 500 W continuous power
• Unprecedented mechanical excursion, +20% compared to conventional designs
• Durable, screwless mesh grille included
• Optimized for an extremely compact, sealed enclosure
• Aluminum die-cast design
• Non-vented rear design for installation with reduced enclosure depth
• 38 mm (1.5 inch) six-layer copper voice coil for high thermal capacity
• Air Intercooling REvolution (A.I.R.) to prevent air compression
• Solid horizontal 8-AWG terminals
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MPS 250 S4

The flat subwoofer MPS 250 S4 was designed to deliver exceptional performance even when very little space is available for the subwoofer enclosure installation.

The MPS 250 S2 is optimized for use in ultra-compact, sealed enclosures from 14 liters (0.49 cubic feet). A typical example is a subwoofer enclosure under the rear seat of pickups, where space and height are limited.

The MPS 250 subwoofer has an unprecedented depth-to-power ratio thanks to the impressive cone excursion capacity, which is 20% higher than a conventional design.

This exceptional goal was achieved thanks to the sophisticated centering design with a special support structure for the spider and coil. This solution allowed the magnet to be moved inward, reducing depth while maximizing the linear excursion of the cone.

SPECIFICATIONS

• Size 250mm 10 inch
• Power handling - Continuous 500W
• Power handling - 1000W Peak
• Impedance 2 Ohm
• Depth 82.6mm
• Voice coil type single
• No filter component subwoofer
• Voice coil Ø 38 (1.5)
• Frequency response 25 - 400Hz
• Magnet size D x T x H 134 x 55 x 36mm
• Weight per component 5.11 kg
• Magnet high-density ferrite
• Cone polypropylene
• Xmech mm 20

Electro-acoustic specifications

• D 216.6mm
• Xmax 16.8mm
• Re 3.3 Ohm
• Fs 29Hz
• Le 3.65mH
• Mms 234g
• Cms 0.11mm/N
• BIS 17.3 T*m
• Qts 0.48
• NS 0.52
• Qms 5.6
• Spl 83.5dB

Physical specifications

• A 274.5 mm
• B 231.6 mm
• C 103.2 mm
• D 82.6 mm
• E 244.6 mm
• F 38.9 mm

Frequency response

DIMENSIONS

• Vb 14.2l net
• Fc 49Hz
• Qtc 0.81
• W 386mm
• H 352 mm
• D 160 mm
• Mounting hole - M 232mm
• Wood thickness 16mm

CUTTING LIST - SEALED

• A mm 386 x 352 Quantity 2
• B mm 386 x 128 Quantity 2
• C mm 320 x 128 Quantity 2

REFLEX BOX

When a high sound pressure level is desired and space is not an issue, reflex designs are the best choice as they concentrate most of the energy in the 40 Hz to 80 Hz range.

BOX TECHNICAL DATA - REFLEX BOX

• Vb 19l
• Fb 35.5Hz
• W 713 mm
• H 372 mm
• D 130 mm
• Z 146 mm
• P 98 mm
• S 52.3 mm
• Mounting hole - M 232mm
• Wood thickness 16mm

CUTTING LIST - REFLEX BOX

• A mm 713 x 372 Quantity 2
• B mm 713 x 98 Quantity 2
• C mm 340 x 98 Quantity 1
• D mm 288 x 98 Quantity 1
• E mm 495 x 98 Quantity 1

MPS 250 S2

The flat subwoofer MPS 250 S2 was designed to deliver exceptional performance even when very little space is available for the subwoofer enclosure installation.

The MPS 250 S2 is optimized for use in ultra-compact, sealed enclosures from 14 liters (0.49 cubic feet). A typical example is a subwoofer enclosure under the rear seat of pickups, where space and height are limited.

The MPS 250 subwoofer has an unprecedented depth-to-power ratio thanks to the impressive cone excursion capacity, which is 20% higher than a conventional design.

This exceptional goal was achieved thanks to the sophisticated centering design with a special support structure for the spider and coil. This solution allowed the magnet to be moved inward, reducing depth while maximizing the linear excursion of the cone.

SPECIFICATIONS

Electro-acoustic specifications

• D mm 216.6
• Xmax mm 16.8
• Re Ohm 2.2
• Fs Hz 28
• LE mH 2.67
• Mms g 250
• Cms mm/N 0.13
• BIS T*m 14.7
• Qts 0.41
• NS 0.45
• Qms 5.3
• Spl dB 82.5

Frequency response