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  • Features:
    The BM220.1 is a robust and well proven unit designed for bass-midrange use in small enclosures right down to minute sealed boxes.
  • Benefits:
    The BM220.1 features a symmetrical field magnet, dual rear suspensions and an extended voice coil for exceptional bass performance at high power levels. It is suitable for use singly or in multiples in compact high power systems where space is at a premium. Operation in a 5 litre sealed box offers an exceptional combination of bass punch, sound level and reliability.
Specifications
  • Model Number: BM220.1
  • Nominal Diameter (mm): 220
  • Power Capacity (Watt AES): 150
  • Sensitivity (dB/watt/m): 91
  • Frequency Range (Hz): 40-2500
  • Impedance (Ohms): 4, 8 or 16
  • BL Factor: 12.7
  • Voice Coil Diameter (mm): 38
  • Voice Coil Material: Copper
  • Maximum Excursion (mm): 25 (before damage)
  • Magnet Assembly Weight (Kg): 3.6
  • Effective Moving Mass (Kg): 0.030
  • Compliance (M/N): 0.00068
  • Volume Displaced (litres): 0.8
  • Connection: 5mm solder terminals
  • Chassis: Diecast Aluminum
Mounting Information
Parameter Measure Unit
Overall Diameter 235 mm
Mounting Bolt Circle Diameter 218 mm
Number and Size of Bolts 4 M5
Baffle Cutout Diameter 192 mm front mount
Baffle Cutout Diameter 200 mm rear mount
Depth 96.5 mm below front flange
Depth 106 mm total depth
Weight 4.5 Kg

BM220.1_line

Response Curve

BM220.1_Resp

Thiele-Small Parameters
Parameter Measure Unit
Fs 35 Hz
Re 5.7 Ohms
Qa 1.5
Qe 0.23
Qt 0.2
Vas 43 litres
Xmax ±5.5 mm
Sd 214 cm²
Vd 117 cm³
Le 1 mH
Suggested Enclosures
Volume(litres) Vent Diameters(cm) Vent Length(cm) System Q -3db freq(Hz)
3 sealed box 120
6 5 4 7 85
10 5 10 7 65
Factsheet PDF

pdf

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