JBL 4512

The JBL 4512 is a two-way bass-reflex studio monitor from the American manufacturer, and the documented record on it is thin. A period listing in Sound and Communication (November 1987, p.33) documents the model within the professional audio market. The available sources agree on the basics. It pairs a 12-inch woofer with a 1-inch dome tweeter, crosses over at 2800 Hz, and presents a nominal 8-ohm load. Both Hi-Fi Review and Analog Audio list the frequency range as 56 Hz to 40 kHz, with power handling rated at 100 watts (recommended amplifier power of 25-100W per Analog Audio). The enclosure is ported, and the terminals accept bi-wiring.

Past those specs, the trail goes quiet. No production years, original price, sensitivity figure, or dimensions have surfaced in the available documentation. A Japanese-language source appears to list physical measurements, but the values were not captured in the extractable text, so they can't be confirmed here. A search snippet suggests a possible "acoustic suspension" enclosure description. That conflicts with the two fully extractable English sources, which both say bass reflex - so the ported designation stands.

The 4512 appears to belong to JBL's control monitor family and shares components with other studio monitors in the line, though specific sibling model names aren't documented in the captured record. If you own a pair and have measurements, production dates, or a sense of how they sound, that would be a genuine contribution — right now, the honest summary is that this is a capable-sounding JBL studio monitor with a spec sheet that's only half filled in.

Type: 2-way, bass reflex (ported)
Drivers: 12" woofer, 1" dome tweeter
Crossover: 2800 Hz
Impedance: 8 ohms nominal
Frequency range: 56 Hz – 40 kHz
Power: 100 watts (recommended amp: 25–100W)
Inputs: Bi-wireable terminals