- Article number
- EM 428
- Woofer Series
- Elite Series
- Woofer Type
- Midwoofer
- Nominal Diameter
- 4"
- Power Handling (RMS)
- 150 Watts
- Power Handling (max)
- 210 Watts
- Impedance
- 8 ohms
- Sensitivity
- 87 dB 2.83V/1m
- Frequency Response
- 50 to 5,000 Hz
- Voice Coil Diameter
- 2.125"
- DC Resistance (Re)
- 5.4 ohms
- Voice Coil Inductance (Le)
- 0.36 mH
- Resonant Frequency (Fs)
- 68 Hz
- Mechanical Q (Qms)
- 3.03
- Electromagnetic Q (Qes)
- 0.48
- Total Q (Qts)
- 0.41
- Diaphragm Mass Inc. Airload (Mms)
- 6.55 g
- Mechanical Compliance of Suspension (Cms)
- 0.88 mm/N
- Surface Area of Cone (Sd)
- 57 cm²
- BL Product (BL)
- 5.4 Tm
- Compliance Equivalent Volume (Vas)
- 0.12 ft.³
- Maximum Linear Excursion (Xmax)
- 3 mm
- Driver's Mechanical Losses (Rms)
- 0.86 N·s/m
- Cone / Diaphragm Material
- Poly Composite
- Surround Material
- Rubber
- Voice Coil Wire Material
- Aluminum
- Voice Coil Former
- Aluminum
- Basket / Frame Material
- Steel
- Magnet Material
- Neodymium
- Overall Outside Diameter
- 4.67"
- Overall Depth
- 2.2"
- Baffle Cutout Diameter
- 3.7"
- # Mounting Holes
- 4
- Mounting Hole Diameter
- 3 mm
- Sealed Volume
- 0.04 ft.³
- Sealed F3
- 131 Hz
- Vented Volume
- 0.11 ft.³
- Vented F3
- 69 Hz
