Helix S 6B - 165mm Mid-Woofer


✓ Mid-Woofer

✓ Magnet: Ferrite

✓ FQ-Range: 45 - 4000Hz

✓ SPL: 90dB

✓ Power: 100 Watt RMS

✓ Impedance: 4 Ohm

✓ Outer diameter: 165mm

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  • New
Stock status: Very high
In stock
delivery time 2 - 4 days
packing unit: pair



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 6B 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!


✓ 6.5” / 165 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.P100 / 200 Watts
Impedance Z4 Ω
DC resistance Re3.4 Ω
Frequency response 45 Hz - 4,000 Hz
Resonance frequency Fs67 Hz
Mechanical Q factor Qms3.87
Electrical Q factor Qes0.96
Total Q factorQts0.77
ComplianceCms370 μm/N
Equivalent air volumeVas10.3 L
Force factor B*I4.8 Tm
1 W / 1 m
SPL90 dB
Cone area Sd141 cm²
Moving mass Mms14.8 g
Cone material Basalt-fiber-paper compound
Mechanical resistance Rms1.64 kg/s
Voice coil diameterø25 mm
Voice coil winding height 12 mm 
Max. linear excursion Xmax+/- 3 mm
Outer diameterø165 mm / 6.50"
Installation diameterø143 mm /  5.63"
Installation depth 65 mm / 2.56"
Recommended enclosure volumes  
Sealed box  
Net volume 9 L
Lower limiting frequency (-3dB) 75 Hz

Scope of delivery

✓ 2 x Mid-woofer Helix S 6B

✓ 1 x Data sheet

✓ 1 x Mounting pattern

1 x Mounting material

✓ Shipping Infos (Click)

Shipping countrys:

✓ Germany

✓ Austria

✓ France


Data sheet

Power Handling
100 Watt
RMS Power Speaker
51 - 100 Watt


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