ESC
604-8H-II

604-8H-II

BrandGreat Plains Audio, Altec, Altec Lansing
ManufacturerGreat Plains Audio, LLC.
SeriesDuplex
FunctionSpeaker
Produced2005
CountryUnited States
Form FactorPart
Signal PathPassive Hardware
Dimensions40.6 × 40.6 × 20.3 cm (W × H × D)
Weight34lbs
Frequency Response30Hz-20kHz (-10dB)
TrebleConstant Directivity Coaxial Horn
Midrange/Bass16" Paper Cone
Sensitivity (500Hz-3kHz)99dB/W/m
Impedance (Nominal)8Ω
Crossover Frequency1.5kHz
Crossover SlopeLow Pass: 12dB/Oct, High Pass: 18dB/Oct (Second Order, Third Order)
Dispersion (Horizontal)60°
Dispersion (Vertical)40°
DC Resistance (Re)6.8Ω
Resonant Frequency (Fs, Woofer)30.9Hz
Qts0.261
Qes0.27
Qms8.49
Volume Displacement (Vd)314.6cm³ (19.2in³)
Equivalent Volume Compliance (Vas)16.35ft³
Reference Efficiency (ηo)4.87%
Maximum Linear Excursion (Xmax)0.2"
Compression Diaphragm MaterialAluminum
Voice Coil Diameter (Treble)1.75"
Voice Coil Diameter (Woofer)3"
Voice Coil Wire Material (Treble)Aluminum
Voice Coil Wire Material (Woofer)Copper
Voice Coil Wire GeometryRectangular
Magnet MaterialFerrite
Power Handling (AES)100W
FinishDark Gray