General Characteristics for 4Ω

Nominal Overall Diameter165 mm6 in

Nominal Voice Coil Diameter20 mm0.79 in

Magnet Weight160 g6 oz

Overall Weight0.6 kg1.32 lbs

Flux Density1.1 T

Thiele-Small Parameters for 4Ω

Voice Coil DC ResistanceRE3 Ω

Resonance FrequencyƒS91 Hz

Mechanical Q FactorQMS8.06

Electrical Q FactorQES1.40

Total Q FactorQTS1.19

Mechanical Moving MassMMS5.5 g

Mechanical ComplianceCMS552 µm/N

Force FactorBxL2.68 Wb/m

Equivalent Acoustic VolumeVAS11.7 lt.

Maximum Linear DisplacementXMAX± 0.5 mm

Reference EfficiencynO0.61 %

Diaphragm AreaSD122.7 cm2

Losses Electrical ResistanceRES18 Ω

Voice Coil Inductance @ 1kHzLE0.16 mH

Constructive Characteristics for 4Ω

MagnetFerrite

Voice Coil WindingCopper

Voice Coil FormerEpotex

Cone MaterialPaper

Surround MaterialFoam

Dust Dome MaterialSolid Paper

Basket MaterialPressed Sheet Steel

Electrical Characteristics for 4Ω

Nominal Impedance4 Ω

Rated Power15 W

Musical Power30 W

Sensitivity@1W,1m90.9 dB

General Characteristics for 8Ω

Nominal Overall Diameter165 mm6 in

Nominal Voice Coil Diameter20 mm0.79 in

Magnet Weight160 g6 oz

Overall Weight0.6 kg1.32 lbs

Flux Density1.1 T

Thiele-Small Parameters for 8Ω

Voice Coil DC ResistanceRE6.64 Ω

Resonance FrequencyƒS89.9 Hz

Mechanical Q FactorQMS8.44

Electrical Q FactorQES1.44

Total Q FactorQTS1.23

Mechanical Moving MassMMS6.7 g

Mechanical ComplianceCMS465 µm/N

Force FactorBxL4.19 Wb/m

Equivalent Acoustic VolumeVAS9.9 lt.

Maximum Linear DisplacementXMAX± 0.5 mm

Reference EfficiencynO0.48 %

Diaphragm AreaSD122.7 cm2

Losses Electrical ResistanceRES39 Ω

Voice Coil Inductance @ 1kHzLE0.43 mH

Constructive Characteristics for 8Ω

MagnetFerrite

Voice Coil WindingCopper

Voice Coil FormerEpotex

Cone MaterialPaper

Surround MaterialFoam

Dust Dome MaterialSolid Paper

Basket MaterialPressed Sheet Steel

Electrical Characteristics for 8Ω

Nominal Impedance8 Ω

Rated Power15 W

Musical Power30 W

Sensitivity@1W,1m89.9 dB