JBL 3120A
The JBL 3120A is a 2-way nearfield studio monitor from JBL's 1200 Series, a lineup that also included the 3110A, 3115A, 3145A, 3135A, and the 3155A subwoofer, among others. It's a sealed-box design with a 12-inch pure pulp cone woofer and a 1-inch titanium dome tweeter, crossing over at 3.5kHz. The cabinet is finished in oiled walnut, and the grille was available in dark brown.
Specs from the period: 8Ω impedance, 45W power rating, 90dB SPL sensitivity (1W/1m), and a frequency response of 80Hz to 20kHz. It weighs 31 lb and measures 20 × 12.5 × 12 inches. Dispersion is described as broad and spacious — 120 degrees horizontal, 100 degrees vertical. Input is via 5-way binding posts.
The 3120A was also listed among the 1200 Series models described as bi-ampable, requiring an external electronic crossover for that mode of operation. Mix Magazine (February 1984, p.132) noted the introduction of the 3110A, 3115A, and 3120A as new Professional Series frequency dividing networks, each equipped with a three-position high-frequency equalization boost.
No production years, original price, or reception details have surfaced in the available documentation. The record is thin beyond the specifications above, which come from a single detailed source.
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