Rich bass out of compact dimensions
The chassis of the K subwoofer series can all be used in very compact enclosures in which they perform magnificently with exceptional bass performance. Especially when it comes to using the available space in the vehicle as good as possible due to an individual enclosure design, these woofers open up completely new possibilities for installation without making any acoustic compromises.

Clever down to the last detail
The extremely stiff cone made of hand-scooped paper fibers in connection with the heavy-duty driver system not only converts amplifier power easily and without compression effects into loads of sound pressure, but also scores sonically with subtle beats.

Maximum flexible connection – 2 x 2 or 1 x 2 Ohms
The chassis of the K-Subwoofer series are available with 1 x 2 Ohms single voice coil (SVC2) or alternatively 2 x 2 Ohms dual voice coil (DVC2). Thus, these subwoofers always offers the right solution for every amplifier configuration to get the maximum performance out of it – whether mono, 2-channel or even multi-channel amplifier.

″All inclusive″ for the do-it-yourselfer
In addition, the solid protective grille and gasket are also included.
For optimal bass performance in DIY installations you can find recommendations for sealed and vented enclosures with all parameters such as net volume, port tuning frequency as well as DSP settings in our technical data sheet.

Features
Extremely stiff, hand-scooped paper cone
Double ventilated voice coil for minimum compression effects and high power handling
Long-excursion rubber surround for highest mechanical rating
Very long linear excursion
1 x 2 Ohms single voice coil
Solid push terminals
Powerful magnet system for compact vented enclosures
Rugged magnet cover with HELIX lettering for perfect magnet protection
Grille and gasket included in delivery

TECHNICAL DATA

Power RMS / max. P 300 / 600 Watt
Impedance Z 1 x 2 Ω
DC resistance Re 1 x 2.0 Ω
Resonance frequency Fs 31 Hz
Mechanical Q factor Qms 4.03
Electrical Q factor Qes 0.54
Total Q factor Qts 0.47
Compliance Cms 142 μm/N
Equivalent air volume Vas 53 L
Force factor B*I 11.9 Tm
Sensitivity 1 W / 1 m SPL 89.0 dB
Cone area Sd 515 cm²
Moving mass Mms 146 g
Cone material Hand-scooped paper cone
Mechanical resistance Rms 9.20 kg/s
Voice coil diameter ø 50.8 mm
Voice coil winding height 24 mm
Max. linear excursion Xmax +/- 8.0 mm
Outer diameter ø 316 mm / 12.44″
Installation diameter ø 286 mm / 11.26
Installation depth 144 mm / 5.67″

Recommended enclosure volumes
Sealed box
Net volume 22 L
Lower limiting frequency (-3dB) 40 Hz
Recommended DSP settings “Self-Define” Highpass: 37 Hz / Q = 1.5
EQ Filter: 80 Hz / Q = 1.3 / -3 dB

Vented box
Net volume 40 L
Port diameter ø 100 mm / 3.94″
Port area 78 cm²
Port length 35 cm / 13.8″
Port tuning frequency Fb 34 Hz
Lower limiting frequency (-3dB) 37 Hz
Recommended DSP settings “Self-Define” Highpass: 34 Hz / Q = 0.8
EQ Filter: 80 Hz / Q = 0.7 / -2 dB