JBL J316PRO (1991)

The JBL J316PRO is a compact two-way bookshelf speaker released in 1991. It was originally priced at ¥90,000 for a pair in Japan. It's a bass reflex design with a 16.5 cm cone woofer and a 2.5 cm dome tweeter. The tweeter has a pure titanium diaphragm, and the magnetic circuit uses a neodymium magnet. The crossover sits at 2.5 kHz, impedance is 6 ohms, and sensitivity is rated at 89 dB/2.83V/1m. Frequency response is specified as 70 Hz to 20 kHz ± 3 dB, with 60W RMS power handling. Each speaker measures 262 x 340 x 245 mm and weighs 7.1 kg.

A few details set it apart. The tweeter level is adjustable with a three-position control (flat, +2 dB, −2 dB). A power indicator lights green for normal input and red for overload. The cabinet is magnetically shielded, so it can sit near a TV. Optional mounting brackets were sold separately - the MTC-51 and MTC-52 for wall and ceiling, plus the MTC-501 and MTC-502. That suggests JBL intended these for installs as well as shelf use.

Documentation on the J316PRO is thin beyond the basic spec sheet. No professional reviews from the period have surfaced, and there's no official production end date in the record. What exists is mostly classified listings and a lone forum question asking whether the speaker is any good. Nobody answered it. One Japanese auction listing described it as a popular model with a characteristically powerful JBL sound despite its compact size. The fact sheet notes that the cabinet and exterior condition of surviving examples tends to be good. Another listing mentioned an edge surround replaced with a genuine JBL part due to slight wear, which is normal maintenance for a thirty-year-old speaker.

• Type: 2-way, 2-speaker, bass reflex, bookshelf
• Woofer: 16.5 cm cone
• Tweeter: 2.5 cm pure titanium dome, neodymium magnet
• Frequency response: 70 Hz – 20 kHz ± 3 dB
• Impedance: 6 Ω
• Sensitivity: 89 dB / 2.83V / 1m
• Crossover: 2.5 kHz
• Power handling: 60W RMS
• Dimensions: 262 × 340 × 245 mm · Weight: 7.1 kg
• Original price: ¥90,000 per pair (1991)

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