JBL 7125 (1977)

The JBL 7125 is a two-way acoustic suspension loudspeaker introduced in 1977 as part of the company's new 7100 Series. The line also included the 7110 and the 7100. JBL's catalog positioned it as a reference monitor loudspeaker, and the original brochure grouped it with the professional-leaning "CT Series" studio monitors. The surviving material doesn't spell out how the two lines relate.

The 1977 brochure documents a fairly straightforward two-way design: a 12″ low-frequency driver crossed over at 1500 Hz to a 5″ high-frequency driver, all in a sealed acoustic suspension enclosure. Rated frequency response is 48 Hz to 25 kHz (±3 dB). Sensitivity is 85 dB SPL (1 W @ 1 m) and nominal impedance is 8 ohms. Power handling is rated at 75 W continuous, with a 300 W peak figure. The cabinet has a walnut-grain vinyl finish and a black grille cloth "with the look of professional performance."

The 7125 was sold in mirror-image pairs, designated Model 7125-A and Model 7125-B, for proper left/right soundstage symmetry. An optional floor stand, also called the Model 7125, was available. Beyond that, the record is thin. There are no production years beyond the 1977 introduction, no original price, no dimensions or weight, and no crossover slope information. No owner feedback, repair notes, or market pricing has surfaced in the research either.

Known specs, in brief:

- Two-way acoustic suspension, sealed enclosure

- 12″ LF driver, 5″ HF driver, crossover at 1500 Hz

- Frequency response: 48 Hz - 25 kHz (±3 dB)

- Sensitivity: 85 dB (1 W @ 1 m); impedance: 8 ohms

- Power: 75 W rated, 300 W peak

- Mirror-image pairs: 7125-A and 7125-B

- Optional floor stand: Model 7125