JBL CM52

The JBL CM52 is a compact bookshelf loudspeaker from JBL. The record on it is thin. No production years or original price have surfaced. What is known comes largely from a surviving spec sheet and occasional sales listings. One of those listings called the CM52 "rare bookshelf monitors" with a front-firing port for bass response.

The spec sheet lists a 2-way system (one source says 3-way) with an 8" woofer, 5" midrange, and 1" tweeter. Crossover points are 2500 Hz and 8000 Hz. Frequency response is rated at 45 Hz - 22 kHz (±3 dB), sensitivity at 87 dB, and power handling at 10 - 150 watts into 8 ohms. The cabinet is a compact bookshelf design with a front-firing port and a single pair of speaker terminals. Used-market listings currently run from about $83 to $195 USD. Manuals are still available for download or purchase through manual vendors.

Type: 2-way bookshelf (some sources note 3-way), 3 drivers
Drivers: 8" woofer, 5" midrange, 1" tweeter
Frequency response: 45 Hz – 22 kHz (±3 dB)
Sensitivity: 87 dB
Power handling: 10–150 W
Impedance: 8 ohms
Crossover: 2500 Hz, 8000 Hz
Enclosure: front-firing port, single pair of terminals