HELIX 3'' cone midrange speaker 75/150 Watts 400 Hz - 6,000 HzHelix S 3M

A cone midrange driver in an elegant design, trimmed for maximum sound quality and thus the perfect addition to any fully active 3-way speaker system.

The highly rigid membrane consists of a novel basalt fibre-paper compound. An ideal combination to ensure clear and precise sound even at high volumes  In addition to maximum uncoloured mid-range reproduction, the S 3M also offers extremely low distortion thanks to the linear neodymium magnet system.

The dream team is the combination with the S 1T tweeter and an S 6B or S 4B woofer. Driven by a power amplifier from Audiotec Fischer, the S loudspeakers perform at their best and provide the perfect basis for absolute top sound systems!

3'' / 75 mm cone midrange speaker with novel basalt fibre-paper compound cone ? a perfect combination of lowest weight, high stiffness and perfect inner damping

Highly efficient, compact neodymium magnet system for a linear drive and minimum distortion

Low-resonant basket made from glass-fibre reinforced plastic with optimized voice coil cooling for high power handling

Grille included

Power RMS / max.

P

75 / 150 Watts(highpass > 400 Hz at 24 dB/Oct.)

Impedance 

Z

4 '

DC resistance 

Re

3.2 '

Frequency response

400 Hz - 6,000 Hz

Resonance frequency 

Fs

130 Hz

Mechanical Q factor 

Qms

4.47

Electrical Q factor 

Qes

0.48

Total Q factor

Qts

0.43

Compliance

Cms

396 µm/N

Equivalent air volume

Vas

0.57 L

Force factor 

B*I

4.6 Tm

Efficiency 1 W / 1 m

SPL

86 dB

Cone area 

Sd

32 cm²

Moving mass 

Mms

3.8 g

Cone material

Basalt-fiber-paper compound

Mechanical resistance 

Rms

0.69 kg/s

Voice coil diameter

ø

25 mm

Voice coil winding height

8 mm

Max. linear excursion 

Xmax

+/- 2 mm

Outer diameter

ø

90 mm / 3.54"

Installation diameter

ø

73 mm / 2.87"

Installation depth

37 mm / 1.46"

Recommended enclosure volumes

Sealed box with minimum 200 ml net volume

Net volumes

Recommended DSP / amplifier settings

0.2 liter (System resonance: 230 Hz)

Crossover frequency: 500 HzMin. filter slope: 12 dB/Oct.

0.4 liter (System resonance: 190 Hz)

Crossover frequency: 450 HzMin. filter slope: 18 dB/Oct.

0.6 litre (System resonance: 170 Hz)

Crossover frequency: 400 HzMin. filter slope: 24 dB/Oct.

Fitting advice

Although some of our products may seem simple to fit we do always advise that you have them installed by a qualified fitter and wait to receive the item before making arrangements for the fitting of the item. We also advise that you contact your insurance company to ensure the modifications you are planning to make to the vehicle does not void your policy. We can not be held accountable if you are not a qualified fitter and you damage the item in any way, if you have booked the fitting before receiving the item or if you do not inform your insurance company of the modification and your insurance is voided.