WOOFER W130X 2x4 Om

13 cm (5") woofer with robust polypropylene membrane for very compact subwoofer. Designed for multi-purpose applications due to 2 x 4 ohms double voice-coil, with excellent properties as 8 ohms drivers in series configuration. The enormous membrane displacement for its size as well as the very low resonance frequency allows a considerable sound pressure level, the one does not trust such a small speaker.
Possible connections:
(1) one voice coil not connected
(2) both voice coils in series
(3) both voice coils in parallel

Rated power 60 W
Nominal impedance Z (1) 4 Ohm(2) 8 Ohm(3) 2 Ohm
Frequency response fu–6000 Hz
(fu: Lower cut-off frequency depending on cabinet)
Mean sound pressure level 78 dB (1 W/1 m)
Maximum linear displacement +/- 5.8 mm (10 % THD)
Excursion limit +/- 11.5 mm
Resonance frequency fs 40 Hz
Magnetic induction 0.92 T
Magnetic flux 694 µWb
Height of front pole-plate 6 mm
Voice coil diameter 40 mm
Height of winding 12 mm
Cutout diameter 123 mm
D.C. resistance Rdc (1) 3.8 Ohm(2) 7.9 Ohm(3) 2.0 Ohm
Mechanical Q factor Qms (1) 4.27(2) 4.39(3) 4.59
Electrical Q factor Qes (1) 0.86(2) 0.41(3) 0.48
Total Q factor Qts (1) 0.71(2) 0.37(3) 0.43
Equivalent volume Vas (1) 5.10 l(2) 5.64 l(3) 5.30 l
Effective piston area Sd 94.2 cm²
Dynamically moved mass Mms 37 g
Force factor Bxl (1) 6.5 Tm(2) 13.2 Tm(3) 6.19 Tm
Inductance of the voice coil L (1) 0.77 mH(2) 2.75 mH(3) 0.69 mH
Connections 4.8 x 0.8 mm (+)2.8 x 0.8 mm (-)