I measured the frequency response of the JBL speaker in the listening window—spatially averaged to minimize room standing-wave problems—using third-octave pink noise, and measured the near-field low-frequency response with a sinewave sweep to get an idea of the true bass extension. The low-frequency –6dB point, measured nearfield, was 42Hz, but there was a little too much upper-bass energy in the room between 63Hz and 200Hz, suggesting that the woofer could do with a little more damping. Given that this lift will artificially extend the bass extension, the true…
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Description: two-way, sealed-box loudspeaker. Drive-units: 1" titanium-dome tweeter, 6.5" polypropylene-cone woofer. Crossover frequency: 3kHz. Frequency response: 55Hz–20kHz ±3dB. Sensitivity: 88dB/W/m. Nominal impedance: 8 ohms. Maximum amplifier power: 200W.
Dimensions: 14.75" H by 9.4" W by 7.25" D. Internal volume: 10 liters. Weight: 17.5 lbs.
Price: $590/pair (1987); no longer available (2017). Approximate number of dealers: 75–80.
Manufacturer: JBL, a division of Harman International, 8500 Balboa Blvd., Northridge, CA 91329. Tel: (800) 336-…
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