Dynaudio 21 W-54

Data

General

• Manufacturer: Dynaudio
• Model: 21 W-54
• Type: Bass loudspeaker
• Years of manufacture: 1980 - 1988
• Made in: Denmark
• Color: Black
• Original price approx.: see technical data

Technical Data

• Type: Cone (MSP Polyprop)
• Diameter: 222 mm cone
• Power handling: 220 W
• Frequency response: 35 - 5'000 Hz
• Sound pressure level: 92 dB / W / m
• Cabinet: bass reflex
  • Reflector tube: 60/190mm (inner diameter / length)

Thiele-Small Parameters

• Impedance (Zmax): 8Ohm
• Power (Pe): 160W
• diaphragm area (Sd): 220cm²
• resonant frequency (Fs): 30Hz
• DC resistance (Re): 5,6Ohm
• Voice coil inductance (Le): 0.250mH
• Mechanical Q-factor (Qms): 2.03
• Electrical Q-factor (Qes): 0.356
• Total Q factor (Qts): 0.303
• Equivalent volume (Vas): 59.6L
• Diaphragm displacement volume (Vd): 154cm³
• drive factor (Bxl): 9.09Tm
• total moving mass (Mmd):
• effective moving mass (Mms): 27g
• mechanical losses (Rms): 2,60kg/s
• diaphragm stroke (Xmax/Xmech): 7,0mm
• Efficency Bandwith Product (EBP):

Remarks

• Other models in the same series:
• Dynaudio D28 AF
• Dynaudio D-54 AF
• Dynaudio 15 W-75
• Dynaudio 17 W-75
• Dynaudio 17 W-75 XL
• Dynaudio 17 W-LQ
• Dynaudio 20 W-75
• Dynaudio 21 W-54
• Dynaudio 24 W-75
• Dynaudio 24 W-75 XL
• Dynaudio 24 W-100
• Dynaudio 30 W-54
• Dynaudio 30 W-100
• Dynaudio 30 W-100 XL
• Dynaudio Variovent

Pictures

• Extract from brochure: Dynaudio 21 W-54

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