HELIX S 4X Audiotec Fischer For VW T4 Coaxial 4" Dash Speaker Set High Quality

Elegant designed mid-woofer trimmed for maximum sound quality. 

The extremely rigid cone consists of a novel basalt-fiber-paper compound - the perfect combination to guarantee clear and straight sound even at high volume levels. Beside a powerful bass reproduction and peerlessly neutral mids, the S 4B impresses with exceptionally low distortion.

A dream team is the combination with the S 1T tweeter that ideally complements the frequency range. Together with an Audiotec Fischer power amplifier, the S loudspeakers strike up to top form and provide the perfect basis for absolute top sound systems!

4" / 100 mm mid-woofer with novel basalt-fiber-paper compound cone - a perfect combination of lowest weight, high stiffness and inner damping

Specially shaped rubber surround for larger effective cone area and increased maximum excursion

Individual HELIX basket with additional ventilation holes for better voice coil cooling and high power handling

Rugged rubber magnet boot with HELIX-logo

Gold-plated terminals

Power RMS / max.

P

70 / 140 Watts

Impedance 

Z

4 Ω

DC resistance 

Re

3.4 Ω

Frequency response

75 Hz - 6,000 Hz

Resonance frequency 

Fs

120 Hz

Mechanical Q factor 

Qms

4.24

Electrical Q factor 

Qes

1.11

Total Q factor

Qts

0.88

Compliance

Cms

232 μm/N

Equivalent air volume

Vas

1.2 L

Force factor 

B*I

4.1 Tm

Efficiency 1 W / 1 m

SPL

89 dB

Cone area 

Sd

61 cm²

Moving mass 

Mms

5.9 g

Cone material

Basalt-fiber-paper compound

Mechanical resistance 

Rms

1.19 kg/s

Voice coil diameter

ø

25 mm

Voice coil winding height

12 mm 

Max. linear excursion 

Xmax

+/- 3 mm

Outer diameter

ø

102 mm / 4.01"

Installation diameter

ø

92.3 mm / 3.63"

Installation depth

46.5 mm / 1.83"

Recommended enclosure volumes  

Sealed box  

Net volume

3 L

Lower limiting frequency (-3dB)

100 Hz

Delivery contents

2 x Mid-woofer HELIX S 4B

1 x Mounting material

1 x Data sheet

1 x Mounting pattern

We take great care packaging every item to ensure safe shipment to you. Our postage and courier charges not only cover the shipping cost, but also the time to pack your order, plus packaging supplies etc. PPlease note - some items may incur extra shipping charges that have to be sent by courier and are too large / expensive to be sent by Royal Mail (for example headlamps, headunits, speakers, lowering springs etc) to the following postcode areas, Channel Islands, BT, most IV, HS, KA-27-28, Any KW, AB30-56, FK17-99, G83, KW1-14, PA21-40, PH18-26, PH30-41, PH49-50, all ZE, IM, and any other non mainland postcodes.