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Esotec MW 152
22μF
4.7Ω
Woofer
Esotec MW 152
The Dynaudio Esotec mid/woofers also utilize the same core technology
as the company’s home audio and professional studio loudspeaker
products, with materials and parameters fully optimized for the par-
ticular conditions typical of in-car installations. All Esotec models are
available in various sizes, all characterized by an ultra linear frequency
response and Dynaudio’s exemplary sonic performance.
The most compact of the new Esotec car series mid/woofers, the new MW 152
is a compact 15 cm (5.75 inch) diameter driver with a 75 mm (3 inch) diameter
voice coil. As is the case with the full range of Dynaudio woofers, the cone
diaphragm is composed of a proprietary MSP (magnesium silicate polymer)
material developed by Dynaudio – a low-distortion material characterized
by a lack of coloration that proves essential to the unique Dynaudio sound.
The MW 152 exhibits a smooth frequency response both on- and off-axis,
with incredibly low distortion. The MW 152 delivers excellent midrange re-
production and is the perfect choice for any small, high-performance two- or
three-way system.
The woofer motor assemblies of the Esotec mid/woofers are built into torsion-
ally rigid die-cast aluminium baskets (a high-strength stamped steel basket
is utilized on the MW 162 GT and MW 182 model variants), which have
been optimized to eliminate air turbulence and resonance and the adverse
effects of such. The aerodynamically shaped ribs of the Dynaudio die cast
driver frames serve to eliminate virtually all reflections and tonal aberrations
created by the traditional driver frame, and ensure the highest degree of
mechanical performance at an extremely low weight.
The low suspension compliance of the MW 152 makes it perfectly suited for
smaller enclosures typical of most in-car installations, while also allowing it to
be utilized without a dedicated enclosure in free-air mounting applications.
Thiele Small Parameters
Nominal impedance Znom 4 Ω
DC resistance Re 3.0 Ω
Voice coil inductance Le 0.24 mH
Resonance frequency fs 70 Hz
Mechanical Q factor Qms 1.9
Electrical Q factor Qes 0.63
Total Q factor Qts 0.47
Mechanical resistance Rms 3.1 kg/s
Moving mass (incl. air load) Mms 14 g
Suspension compliance Cms 0.38 mm/N
Effective dome diameter d 105 mm
Effective piston area Sd 87 cm²
Equivalent volume Vas 4 l
Force factor BL 5.4 Tm
Recommended frequency range 55–3500 Hz
Magnet and Voice Coil Properties
Voice coil diameter dc 75 mm
Voice coil height hc 10.9 mm
Linear excursion, peak to peak 6 mm
Max. excursion, peak to peak 15 mm
Power Handling
Nominal long term IEC 100 W
Transient (10 ms) 1000 W
Mechanical Properties
Net weight 1.1 kg
Overall dimension ø 145.5 x 70 mm
SPL
(Frequency response: on-axis,
30° and 60° off-axis)
Red line: on-axis response
Green line: 30° horizontal
Blue line: 60° horizontal
Measurement conditions:
Level: 2.83 V
Distance: 1 m
Box volume: 8.4 l
Facts
Diaphragm and dust cap moulded
as one piece
Large 75 mm voice coil ensures
high power handling
Internal double magnet system
with vented pole piece
Aluminium voice coil wire provides
for a low moving mass
Rigid die-cast chassis with
aerodynamically shaped ribs
Materials and parameters are
optimized for the harsh environ-
mental conditions in a car
Smooth high-frequency roll-off
Impedance
(with and without impedance
correction circuit)
Red line: impedance, free air
Green line: impedance, free air
with compensation.
Measurement conditions:
Level: 2 V, 10 ohm
Driver in free air
Impedance compensation circuit