- Article number
- ND140-4
- Woofer Series
- ND Series
- Woofer Type
- Midwoofer
- Nominal Diameter
- 5.25"
- Power Handling (RMS)
- 40 watts
- Power Handling (max)
- 80 watts
- Impedance (Z)
- 4 ohms
- Sensitivity
- 88.4 dB @ 2.83V/1m
- Frequency Response
- 54 - 8,000 Hz
- Voice Coil Diameter
- 1"
- DC Resistance (Re)
- 3.7 ohms
- Voice Coil Inductance (Le)
- 0.79 mH @ 1 kHz
- Resonant Frequency (Fs)
- 59.2 Hz
- Mechanical Q (Qms)
- 5.35
- Electromagnetic Q (Qes)
- 0.72
- Total Q (Qts)
- 0.63
- Diaphragm Mass Inc. Airload (Mms)
- 10.1g
- Mechanical Compliance of Suspension (Cms)
- 0.71 mm/N
- Surface Area of Cone (Sd)
- 86.6 cm²
- Volume of Displacement (Vd)
- 34.6 cm³
- BL Product (BL)
- 3.9 Tm
- Compliance Equivalent Volume (Vas)
- 7.22 liters
- Maximum Linear Excursion (Xmax)
- 4.0 mm
- Cone / Diaphragm Material
- Black Anodized Aluminum Cone
- Surround Material
- Rubber
- Voice Coil Former
- Kapton Polyimide
- Magnet Material
- Neodymium
- Shielded
- Yes
- Overall Outside Diameter
- 138 mm
- Overall Depth
- 70.5 mm
- Baffle Cutout Diameter
- 120 mm
- # Mounting Holes
- 4
- Sealed Volume
- 0.78 ft.³
- Sealed F3
- 65 Hz
- Vented Volume
- 1 ft.³
- Vented F3
- 34 Hz
