Illuminator
6½″ Midwoofer

Type Number: 18WU/8741T00

Features:

The Illuminator woofers are based on compact under-hung motor systems with large neodymium ring magnets. The patent pending motor offers a very long linear excursion together with a very high force factor. The top plate is shaped to “guide” the backside airflow around the motor and with the very open cast aluminum chassis design the driver is virtually free from compression.

Driver Highlights: Neo magnet, Under hung motor system, exceptionally long linear stroke

 

Specs:

Electrical Data

Nominal impedance

Zn

8

ohm

Minimum impedance

Zmin

7.5

ohm

Maximum impedance

Zo

58.4

ohm

DC resistance

Re

5.9

ohm

Voice coil inductance

Le

0.41

mH

T-S Parameters

Resonance Frequency

fs

31

Hz

Mechanical Q factor

Qms

3.51

Electrical Q factor

Qes

0.37

Total Q factor

Qts

0.33

Force factor

Bl

7.5

Tm

Mechanical resistance

Rms

1

Kg/s

Moving mass

Mms

18

g

Suspension compliance

Cms

1.46

mm/N

Effective cone diameter

D

--

cm

Effective piston area

Sd

154

cm2

Equivalent volume

Vas

49

ltrs

Sensitivity (2.83V/1m)

85.4

dB

Ratio BL/√(Re)

--

Ratio fs/Qts

F

--

Power handling

100h RMS noise test (IEC)

80

W

Long-term Max Power (IEC 18.3)

150

W

Max linear SPL (rms) @ power

--

dB/W

Short Term Max power (IEC 18.2)

--

W

Voice Coil and Magnet Parameters

Voice coil diameter

42

mm

Voice coil height

8

mm

Voice coil layers

4

Height of the gap

20

mm

Linear excursion +/-

9

mm

Max mech. excursion +/-

16

mm

Flux density of gap

--

mWb

Total useful flux

--

mWb

Diameter of magnet

90

mm

Height of magnet

4

mm

Weight of magnet

0.13

Kg



Notes:
IEC specs refer to IEC 60268-5 third edition
All ScanSpeak products are RoHS compliant

 

Frequency:18WU/8741T00

Mechanical Dimensions:

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