JBL 4507

Documentation on this model is thin, and there's a naming problem up front. The single source that records it calls it the JBL L4507, while the archive lists it as the 4507. The record doesn't settle whether these are the same product or two different models. What follows is what's documented, under either name.

The JBL L4507 is described as a 2-way bass reflex floorstanding speaker. Frequency response is rated at 40 - 22,000 Hz, nominal impedance is 8 ohms, and power handling is 100 watts. It weighs 11 kg and measures 285 x 520 x 305 mm (W x H x D).

That's all the verified record holds. No production years, original price, driver complement, crossover point or cabinet material have turned up. No period reviews have been located either. The model shows up in a Mix Magazine classified listing (November 1988, p.95) only as part of a sound-reinforcement system with 2360 Series horns and 2225 low-frequency drivers. That at least confirms the 4507 enclosure was in professional use in the late 1980s.

Type: 2-way bass reflex floorstanding speaker
Frequency response: 40–22,000 Hz
Power handling: 100 W
Impedance: 8 ohms
Weight: 11 kg
Dimensions (W x H x D): 285 x 520 x 305 mm