JBL 2366A

The JBL 2366A is a large-format bi-radial constant-directivity horn from JBL Professional's sound reinforcement line. It's the smaller sibling of the famous 2360A. It's a fiberglass horn with metal mounting brackets, finished in black textured paint, and it weighs 41 pounds. The horn is passive. You supply the compression driver, and JBL designed it for 2-inch exit drivers like the 2445 or 2446J.

The 2366A holds a constant directivity. Older radial horns let coverage narrow as frequency rises. The bi-radial curve is curved in both horizontal and vertical planes, and it keeps a steady pattern across the operating range. The JBL datasheet lists the coverage as 60° by 60°, with a usable range of 630 Hz to 16 kHz and a lower cutoff of 500 Hz. Some third-party references describe it as 60° horizontal by 40° vertical, but the manufacturer's own spec sheet is the more reliable source. The recommended companion bass enclosures are the 4530, 4507, or 4508. JBL specifies the 3105 external crossover, since there's no internal network.

With a 2445 driver attached, the combination is rated at 111 dB SPL (1W/1m at 1 kHz) and 100 watts continuous. Owners on ProSoundWeb and Gearspace like its clarity for speech and say it lacks the harsh, strident sound they associate with older radial horns. They also note the fiberglass body is heavy, the corners chip easily, and the mounting brackets aren't adjustable. The 3105 crossover is reportedly hard to find and expensive when you do find it, so many users run a generic active crossover instead. Period trade coverage is thin. Sound and Communication (January 1988, p.33) ran a brief item in the same issue that carried Ross Systems advertising, but no formal test of the 2366A appears in the usual hi-fi press. This is professional gear, not consumer kit.

No introduction year or original retail price has been documented in the sources available. The usual failure points are the driver diaphragm and the edges of the fiberglass body. Used prices in forum marketplace threads typically run $150-400 per horn depending on condition and whether a driver is included, though that's an informal estimate rather than a verified figure.