HELIX K 12W | 30cm subwoofer with 2x2 ohms

This is where DIY enthusiasts come in, when it comes to optimally utilizing available space in the vehicle through a custom subwoofer enclosure design.

The two systems, K 10W and K 12W, are technically absolutely identical to the drivers used in the K-series enclosure subwoofers.

A glance at the Thiele/Small parameters immediately reveals to the expert that these are perfectly designed for compact bass-reflex enclosures and offer ample scope for choosing individual sound characteristics. Those who want to play it safe can simply use the net volume and port tuning frequency of the K 10E or K 12E enclosure subwoofers as a guide and thus achieve guaranteed excellent bass performance. So, get out your saw and build yourself a custom subwoofer for your car! Features: Extremely torsionally rigid, hand-molded paper cone; Double voice coil ventilation for minimal compression effects; Long-throw rubber surround for maximum mechanical strength; Very large linear excursion; 2 x 2 Ohm dual voice coils for flexible system configurations; Solid push-fit terminals

Powerful magnet system optimized for compact bass reflex enclosures

Robust magnet cover with HELIX logo to protect the magnet

Grille and cover ring included

Technical Specifications

RMS / Max. Power	P	300 / 600 Watts
Impedance	Z	2 x 2 Ω
DC resistance	Re	2 x 1.6 Ω
Resonance frequency	Fs	32 Hz
Mechanical quality	Qms	3.70
Electrical quality	Qes	0.46
Overall quality	Qts	0.41
Compliance	Cms	179 μm/N
Equivalent volume	Vas	66 L
Power factor	B*I	13.7 Tm
Efficiency 1 W / 1 m	SPL	90.0 dB
Membrane area	Sd	515 cm²
Moving mass	Mms	134 g
Membrane material		Handmade paper membrane
Mechanical resistance	Rms	7.33 kg/s
Voice coil diameter	ø	50.8 mm
Voice coil winding width		24 mm
Max. linear diaphragm stroke	Xmax	+/- 8.0 mm
Outer diameter	ø	316 mm
Installation diameter	ø	286 mm
Installation depth		144 mm
Recommended housing volumes
Closed housing
Net volume		18 L
Lower cutoff frequency (-3dB)		49 Hz
Bass reflex enclosure
Net volume		30 L
Reflex channel diameter	ø	100 mm
Reflex channel area		78 cm²
Reflex channel length		28 cm
Tunnel tuning frequency	Fb	39 Hz
Lower cutoff frequency (-3dB)		39 Hz

Scope of delivery

1 x Subwoofer HELIX K 12W
1 x Grille
1 x Cover ring
1 x Datasheet