JBL 4312BMKII 78,000yen(one-set , around the 1999 time)

The black type 3 way speaker system of 4312.
The unit has composition only 4312MKII and whose unit of a high region are different.

2213H of the 30cm white cone type unit which adopted the copper ribbon edgewise volume voice coil of the diameter of 75mm is adopted as low-pass.
The SFG (symmetrical field geometry) magnetic circuit which realized the low distortion, and the aluminum die-casting frame excellent in the mechanical intensity are adopted.

12.5cm mid range driver 104H-3 which belongs to the unit of LE5 system is carried in the mid range.

035Ti of the 25mm pure titanium dome tweeter which molded the pure titanium material of the high hardness into the dome shape of 25micro thickness is carried in the high region.
A diamond edge pattern original with JBL and a reinforcement rib excellent in the linearity are adopted.

The enclosure serves as a characteristic layout which is the black finish which performed emboss processing of the skid, and aimed at the convergence of the voice source.
Moreover, the Attenuator which became independent in the mid range and the high region is carried. 

Scheme	3 ways, 3 loudspeaker bass-reflex scheme, and a bookshelf type
Unit etc.	For low-pass: 30cm cone type (2213H) For mid ranges: 12.5cm cone type (104H-3) For high regions: 2.5cm dome shape (035Ti)
Frequency characteristic	45Hz - 20kHz (-6dB)
Output sound pressure level	93dB/2.83V/m
Impedance	6ohms
Allowable input	100W(RMS)
Cross over frequency	1100Hz, 4200Hz
Dimensions	Width 362x height 597x depth of 298mm
Weight	20kg

Posted in: JBL, JBL-Speaker, JBL-Speaker-Professional