JBL M712

The JBL M712 is a rare, little-documented model from JBL's Pro Series line — a two-way studio monitor designed, per period dealer listings, to pair with the JBL M721 powered subwoofer. That companion relationship is about the extent of the historical record; no production years, original pricing, or independent third-party reviews have surfaced. What we know comes down to the specifications and the word of the few sellers who have handled them.

Technically, the M712 is a bass-reflex (ported) two-way design rated at 8 ohms with a sensitivity of 87dB (1m / 2.83V) and a continuous program power capacity of 75W. It uses a 178mm (7") magnetically shielded cone woofer and a 25mm (1") titanium dome tweeter, with the crossover set at 3.5kHz. One database source also lists a second crossover point at 900Hz, which likely reflects a mid-bass transition rather than a true three-way configuration — but the documentation is thin enough that I won't press the point. Frequency response is spec'd at 42Hz to 25kHz.

The magnetic shielding on the woofer suggests these were intended for nearfield use beside CRT displays in project studios, which fits the "Pro series" positioning. A UK dealer who sold a refurbished pair (rebuilt by JBL-certified engineers in Germany) described them as having "very detailed sound with crystal clear highs, a sweet midrange and a punchy bottom end" — a seller's description, admittedly, but the only reception commentary on the record. The same listing priced a pair at £1,295.

EQ Magazine (August 1992, p.110) ran an advertisement from the period emphasizing that professional audio systems are only as good as their weakest link — a campaign that framed JBL's pro components, the M712 among them, as the strong link in a signal chain. It's a thin thread, but it places the model in JBL's early-90s professional lineup.

**Known specs:**

- Type: 2-way bass-reflex studio monitor

- Impedance: 8Ω

- Sensitivity: 87dB / 1m / 2.83V

- Power handling: 75W continuous program

- Crossover: 3.5kHz (one source also lists 900Hz)

- Drivers: 178mm shielded cone woofer, 25mm titanium dome tweeter

- Frequency response: 42Hz – 25kHz

Beyond this, the record is essentially empty. No dimensions, no weight, no original price, no service history, no owner forums. If you own a pair, the Archive would love to hear from you.