JBL 4872

Commentary

A speaker system for the concert series.

The 4872 is a 4870 speaker family system and is bi-amp-driven.
The 4870 family was developed for SR and music playback that require Hi-Fi sound. The 4870 family comes in four variations, 4870, 4871, 4872 and 4873, each with a different unit configuration.

Two 38 cm cone type woofer 2225H are installed in the low range.
In the high range, a flat biradial horn 2385A and a driver unit 2445J using a pure titanium 4-inch diaphragm are mounted.

The enclosure is made of high-density birch-laminated plywood with excellent strength. The surface is treated with glass-fiber reinforced plastic for excellent durability. The side of the enclosure is cut into a 15 ° tapered shape, and by placing multiple tubes in a fan-like configuration, an extremely wide service area can be obtained.

It is equipped with 14 embedded metal fittings for flying.

The Concert Series included a wide range of specialized options, including a carrying load case and various speaker mounting brackets.

Model Rating

Method	2-Way, 3-Speaker, Bass Reflex System, Floor Type
Units Used	For low band : 38 cm cone type (2225H) x2 For High Range : Horn Type (2445J + 2385A)
Frequency characteristic	35 Hz to 20 kHz -10dB 45 Hz to 16 kHz ± 3 db
Impedance	LF : 4 Ω HF : 16 Ω
Allowed Inputs (continuous)	LF:800W HF:150W
Maximum output sound pressure level (continuous)	134dB/m
Horizontal directivity	60 °
External dimensions	Width 750x Height 1,260x Depth 500 mm
Weight	97kg