ESC
XII (Rev. 2)

XII (Rev. 2)

BrandRectilinear
ManufacturerRectilinear Research Corporation
FunctionSpeaker
Produced197?-1975
CountryUnited States
Form FactorBookshelf / Stand Mounted
Signal PathPassive Hardware
Dimensions35.6 × 63.5 × 27.3 cm (W × H × D)
Weight42lbs
Frequency Response45Hz-18.5kHz ±2dB
Treble2.5" Paper Cone (Part #T-3, Voice Coil: 0.56", 3oz Ferrite Magnet)
Midrange5" Paper Cone (Part #JM-5)
Bass10" Paper Cone (Part #W-11, Voice Coil: 1.5")
Impedance (Nominal)8Ω
Impedance (Minimum)7.5Ω
Impedance (Maximum)25Ω (At 51Hz)
Crossover Frequency350Hz, 4kHz
Crossover SlopeBass 12dB/Oct, Midrange/Treble: 6dB/Oct (Second Order, First Order)
Minimum Recommended Power (RMS)10W
Power Handling (RMS)50W
Enclosure TypeBass Reflex
Enclosure Construction0.75" Particleboard
FinishOiled Walnut
MSRP$139
Connections
  • Input · Binding Post (Universal)
Controls
  • Treble Level · Rotary Pot
  • Midrange Level · Rotary Pot
NotesMidrange driver changed from prior version.