JBL 2305
Surviving documentation on the JBL 2305 is thin, and what exists is partly contradictory. The record shows it was a studio monitor / speaker system produced by JBL, built around a 12-inch LE-15B woofer and an LE-85 compression driver on an HL-91 slant-plate horn. The crossover network splits at 750 Hz and 3,500 Hz. That implies three drivers, but sources disagree on whether the system is fundamentally 2-way or 3-way.
The numbers that are consistent across the listings: 8-ohm nominal impedance, 91 dB sensitivity, and a rated power handling of 150 watts. The frequency range is stated as 28-22,000 Hz. The cabinet is big, about 27.5 inches high, 25 inches wide and 15.5 inches deep, and it weighs around 139 lbs. The enclosure is described as bass reflex.
The 2305 shows up in period recording-industry press as part of professional installations. Recording-Engineer (June 1982, p.62) mentions the 2305 in the context of concert sound systems in Australia and New Zealand, paired with 2441 drivers and perforated-lens HF arrangements. That suggests the model saw real use in the field.
Not documented: production years, original pricing, and any detailed design history. The conflicting 2-way / 3-way designation may come from a source describing the system's electrical crossover points versus its physical driver count. Without a manual or service sheet, that can't be settled.
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