JBL 5674
The JBL 5674 is a professional cinema surround loudspeaker — a piece of commercial theater equipment that has found a second life in home theaters. It's a sealed-box design pairing one 200mm (8in) low-frequency driver with a 25mm (1in) high-frequency driver, with the crossover set at 1.2kHz. The specs that are documented paint a picture of a capable, efficient surround channel: 55Hz–20kHz frequency response (±3dB), 92dB sensitivity (1W/1m), and an 8-ohm nominal impedance. Its power handling is substantial — 200W continuous pink noise, 800W peak — which tells you it was built to take a beating in a commercial auditorium.
Owners on the AVS Forum have reported good results using the 5674 in home theater setups. They describe it as very efficient and able to play loudly without distortion. That fits a professional cinema speaker, which puts high output and rugged construction ahead of cosmetics.
The record is thin beyond that. No production years, original price, or weight have surfaced in the available documentation. The unit doesn't appear in the period hi-fi press the way consumer JBL models did, because integrators installed it and audio magazines didn't review it. What's known comes largely from professional equipment listings and owner reports, though the unit did appear in Mix Magazine (August 1997, p.168) coverage of a theater upgrade.
Known specs:
- Type: Sealed-box cinema surround loudspeaker
- Drivers: 200mm (8in) LF, 25mm (1in) HF
- Crossover: 1.2kHz
- Frequency response: 55Hz–20kHz (±3dB)
- Sensitivity: 92dB (1W/1m)
- Power handling: 200W continuous pink noise (800W peak)
- Impedance: 8 ohms
- Dimensions: 500mm H × 360mm W × 230mm D
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