ESC
604-8E II Super Duplex

604-8E II Super Duplex

BrandGreat Plains Audio, Altec, Altec Lansing
ManufacturerGreat Plains Audio, LLC.
SeriesDuplex, Classic Series
FunctionSpeaker
Produced2018
CountryUnited States
Form FactorPart
Signal PathPassive Hardware
Dimensions40.6 × 40.6 × 0 cm (W × H × D)
TrebleExponential Coaxial Horn
Midrange/Bass16" Paper Cone (Alternately listed as 15")
Crossover Frequency1.5kHz (Great Plains Audio N604-8A)
Crossover SlopeLow Pass: 12dB/Oct, High Pass: 18dB/Oct (Second Order, Third Order)
Dispersion (Horizontal)60°
Dispersion (Vertical)40°
Effective Surface Area (Sd)825.8cm² (128in²)
Effective Piston Diameter12.77"
Voice Coil Diameter (Treble)1.75"
Voice Coil Diameter (Woofer)3"
Magnet MaterialAlNiCo
FinishBlack Powder Coat
MSRP (2020)$2,290
LinksProduct Page