ESC
IIIa

IIIa

BrandRectilinear
ManufacturerRectilinear Research Corporation
FunctionSpeaker
Produced1975-1976
CountryUnited States
Form FactorFloorstanding
Signal PathPassive Hardware
Dimensions45.7 × 88.9 × 30.5 cm (W × H × D)
Weight75lbs
Frequency Response32Hz-18.5kHz ±2dB
Super Tweeter2" Paper Cone (x2) (Part #ST-2)
Treble2.5" Paper Cone (x2) (Part #T-3, Voice Coil: 0.56", 3oz Ferrite Magnet)
Midrange5" Paper Cone (Part #JM-5, Voice Coil: 1")
Bass12" Paper Cone (Part #P-12KFH)
Impedance (Nominal)8Ω
Crossover Frequencies400Hz, 5kHz, 11kHz
Minimum Recommended Power (RMS)30W
Power Handling (RMS)100W
Enclosure TypeBass Reflex
Enclosure Construction0.75" Particleboard
FinishLaminite Walnut
Connections
  • Input · Binding Post (Universal)
Controls
  • Midrange Level · Rotary Pot
  • Treble Level · Rotary Pot