Dynaudio Esotar2 110, Manual

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22μF
4.7Ω
Esotec MW 162 Woofer
Esotec MW 162
The Esotec MW 162 mid/woofer is a medium sized 17 cm (6.5 inch)
diameter driver that combines a clear and detailed midrange with a
strong and powerful bass response.
Another characteristic typical of Dynaudio drivers and carried through in
the new Esotec mobile series woofers is the diffraction-optimized shape of
the MSP cone’s characteristic curvature, which further improves imaging so
that even at short listening distances as typical of most in-car installations a
realistic, true three-dimensional sound-stage can be enjoyed. Molding the
diaphragm and dust cap into a one-piece flat-membrane results in a con-
trolled roll off and high dynamic range. In relation to the total cone surface
area, the 75 mm (3 inch) voice coil is exceptionally large in diameter, allowing
a most precise conversion of the amplifier’s signal to music. The result is
un-compromised, direct music enjoyment.
All of the Esotec MW (mid/woofer) model variants employ Dynaudio’s cus-
tomary oversized aluminium voice coil, which feature an uncharacteristically
large diameter coil wound on a strong and temperature stable former to
drive the geometrically optimized rigid MSP cone diaphragm. The Esotec
mid/woofers have all been further upgraded with a brand-new suspension.
The new spider allows greater mechanical movement of the cone, increasing
excursion while allowing a higher maximum SPL and improved low bass
performance.
The use of Dynaudio’s large diameter aluminium voice coils increases ther-
mal handling capabilities tremendously, allowing the drivers to operate within
an ideal temperature range, even at high continuous power levels and during
powerful music transients. Dynamic impulses are reproduced precisely and
without distortion, even at high volume levels, while impressive sound quality
and high power handling capability are achieved.
Thiele Small Parameters
Nominal impedance Znom 4 Ω
DC resistance Re 3.1 Ω
Voice coil inductance Le 0.22 mH
Resonance frequency fs 55 Hz
Mechanical Q factor Qms 2.2
Electrical Q factor Qes 0.57
Total Q factor Qts 0.45
Mechanical resistance Rms 2.7 kg/s
Moving mass (incl. air load) Mms 17.4 g
Suspension compliance Cms 0.48 mm/N
Effective dome diameter d 124 mm
Effective piston area Sd 120 cm²
Equivalent volume Vas 9.8 l
Force factor BL 5.7 Tm
Recommended frequency range 40–4000 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 17 mm
Power Handling
Nominal long term IEC 120 W
Transient (10 ms) 1000 W
Mechanical Properties
Net weight 1.2 kg
Overall dimension ø 175 x 77 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: 15.6 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
Natural midrange reproduction
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