JBL E151

Configuration: 1 x 15" 2-way bass reflex
Frequency response: 38 Hz – 20 kHz (-10 dB)
Power rating: 250W continuous / 1000W peak
Sensitivity: 98 dB (1W/1m, half space)
Impedance: 4 ohms
Dimensions (HxWxD): 21.5" x 18.3" x 17.5"

Documentation on the JBL E151 is thin. The record is a single spec sheet and one former owner's recollections. What's known: it was a professional full-range loudspeaker system, configured as a 1 x 15" two-way bass reflex cabinet. The spec sheet lists a frequency response of 38 Hz - 20 kHz (-10 dB), 250W continuous / 1000W peak power handling, 98 dB sensitivity (1W/1m, half space), and a 4-ohm impedance. Dimensions are 21.5" x 18.3" x 17.5".

The one owner account comes from a forum post (July 2018) by someone who bought a pair new around 1998. He called them an "absolute bargain at the time." Run with an Ashdown MAG 300 head, the low end was "massive" and they "made the stage melt." He noted two caveats. They were heavy to move, and the titanium compression drivers proved unreliable, needing replacement a couple of times. He also reported that the dust caps on the 15" woofers had a habit of splitting. Modern Recording (April 1980, p.16) mentioned the introduction of JBL's new E Series in a reader correspondence column, but gave no detail on this model.

No production years, original price, crossover frequency, or driver component details are confirmed. The owner's recollection places them around 1998, but that's a single memory. He also noted he hasn't seen a pair for sale in years.