HELIX K 8W 8" Subwoofer
Do-it-yourselfers, here's your chance to create your personal subwoofer box, to fit perfect into your car! From the technical point of view the drivers K 8W, K 10W and K 12W are absolutely identical with the subwoofers that are installed in the K series enclosure subs. Just have a look at the Thiele/Small parameters and you will easily notice that those are designed for compact vented and sealed cabinets, yet leaving plenty of "headroom" for designing your own preferred sound characteristic. If you prefer it to play safe, just choose the net volume, port tuning frequency and DSP settings as recommended in the technical data for outstanding bass performance. So what are you waiting for? Start your "tailor-made subwoofer project" right now!
Features
Extremely stiff, hand-scooped paper cone
Double ventilated voice coil for minimum compression effects and high power handling
Rugged magnet cover with HELIX lettering for perfect magnet protection
Long-excursion rubber surround for highest mechanical rating
2 x 2 Ohms dual voice coil for flexible system configuration
Solid push terminals
Powerful magnet system for compact vented enclosures
Grille and gasket included in delivery
Technical Information
Power RMS / max.
P
300 / 600 Watts
Impedance
Z
2 x 2 Ω
DC resistance
Re
2 x 1.6 Ω
Resonance frequency
Fs
37 Hz
Mechanical Q factor
Qms
3.56
Electrical Q factor
Qes
0.46
Total Q factor
Qts
0.41
Compliance
Cms
262 μm/N
Equivalent air volume
Vas
17 L
Force factor
B*I
10.7 Tm
Efficiency 1 W / 1 m
SPL
86.0 dB
Cone area
Sd
219 cm²
Moving mass
Mms
69 g
Cone material
Hand-scooped paper cone
Mechanical resistance
Rms
4.54 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
213 mm / 8.38"
Installation diameter
ø
182 mm / 7.17"
Installation depth
101 mm / 3.98"
Recommended enclosure volumes
Sealed box
Net volume
8 L
Lower limiting frequency (-3dB)
50 Hz
Recommended DSP settings
Recommended "self-define" highpass filter with 50 Hz cut-off frequency and Q = 1.5, additional EQ filter 115 Hz / Q = 1.0 / -2.5 dB
Vented box
Net volume
8 L
Port diameter
ø
60 mm / 2.36"
Port area
28 cm²
Port length
42 cm / 16.5" (angled port)
Port tuning frequency
Fb
43 Hz
Lower limiting frequency (-3dB)
45 Hz
Recommended DSP settings
Recommended "self-define" highpass filter with 43 Hz cut-off frequency and Q = 1.5, additional EQ filter 120 Hz / Q = 0.8 / -3.5 dB
Whats in the box
1 x Subwoofer HELIX K 8W 1 x Grille 1 x Gasket 1 x Data sheet