SL 70 NDV - 4 Ohm

Art. No. 2274

6.5 cm (2.5") full-range speaker with balanced frequency response and increased high-range. Especially suitable as built-in speaker for music and speech reproduction and as driver for slim PA column systems. Water-resistant and robust construction due to various plastic materials. Thanks neodymium extremely light and compact.

*) IP protection class for front side when built into a sealed enclosure

Technical Data

Rated power
8 W
Maximum power
15 W
Nominal impedance Z
4 Ohm
Frequency response
150–20000 Hz
Mean sound pressure level
86 dB (1 W/1 m)
Excursion limit
+/−3 mm
Resonance frequency fs
220 Hz
Magnetic induction
1.26 T
Magnetic flux
148 µWb
Voice coil diameter
15 mm
Height of winding
3 mm
Cutout diameter
63 mm
Net weight
60 g
D.C. resistance Rdc
3.8 Ohm
Mechanical Q factor Qms
Electrical Q factor Qes
Total Q factor Qts
Equivalent volume Vas
0.43 l
Effective piston area Sd
21.6 cm²
Dynamically moved mass Mms
0.8 g
Force factor Bxl
1.39 Tm
Inductance of the voice coil L
3.0 x 0.5 mm (+)/3.0 x 0.5 mm (−)
Protective system
IP 65 *)
Temperature range
−40 ... 80 °C
Frequency- and impedance response
Directivity pattern