JBL 2370 Bi-Radial Horn

Name: JBL 2370
Brand: JBL

The JBL 2370 is a Bi-Radial® constant-directivity horn. JBL's design approach for controlling dispersion is right there in the name. It's a professional-grade component, meant to be paired with a compression driver rather than used on its own. The spec sheet from the JBL Professional archive gives the essentials: a frequency range of 500 Hz to 29 kHz (depending on the driver), nominal impedance of 8 ohms, and a power capacity of 100W with the 2426H 3/4-inch exit compression driver. Sensitivity is rated at 112 dB @1W, 1m with that same driver. Dispersion is 90° horizontal by 40° vertical, with a recommended crossover range of 800 Hz to 2.0 kHz. The throat is 3/4-inch exit with a 2.25-inch center-to-center, 3-bolt pattern.

The horn is compact for what it is: 8.3 × 19.0 × 10.6 inches and 13 pounds net. It turns up in professional settings. Mix Magazine (December 1983, p.102) mentioned the 2370 in a discussion of horn flare design. Later issues (June 1989, p.137) list it in touring sound-reinforcement rigs paired with JBL 2425 drivers, alongside 2225 and E120 woofers. That's the extent of the period record.

Beyond that, documentation is thin. No production years, no original MSRP, and no owner reports of problems or repairs have surfaced. The DIY community has taken some note - a forum thread on diyaudio.com from an owner picking up a pair in excellent condition and considering them for use with 1-inch drivers. That's about it.

- **Type:** Bi-Radial® constant-directivity horn

- **Frequency range:** 500 Hz - 29 kHz (driver-dependent)

- **Sensitivity:** 112 dB @1W, 1m (with 2426H)

- **Nominal impedance:** 8 ohms (with 2426H)

- **Power capacity:** 100W (with 2426H)

- **Dispersion:** 90° H × 40° V

- **Crossover range:** 800 Hz - 2.0 kHz

- **Throat:** 3/4-inch exit, 2.25" c-c 3-bolt pattern

- **Dimensions (H×W×D):** 8.3 × 19.0 × 10.6 in (211 × 483 × 269 mm)

- **Net weight:** 13.0 lb (5.9 kg)