Audio Database

The

JBL 4312XP
126,000yen(one-set, around the 1990 time)

Description
 
The speaker system which adopted the material original with an old enclosure and realized clearer and high-definition sound in order to refine the tone quality of 4312 serieses further.

2213H which is a 30cm cone type unit is adopted as low-pass.
The SFG magnetic circuit original with low distortion JBL is adopted as a magnetic circuit. The cone paper coated [ the special reinforcing material ] is adopted as a diaphragm. And the clear bass whose dumping was effective is gained.
Moreover, rigidity is raised by adopting aluminum die-casting as a frame.

104H-3 which is a 13cm cone type unit is carried in the mid range.

035Ti which is a pure titanium tweeter is carried in the high region.
Pure titanium was molded into the precision dome of 25micro thickness, and the skillful tone quality is realized in combination with the diamond edge suspension aiming at the improvement in a high region property, and the rib pattern which prevents a splitting oscillation.

The Attenuator which can control each of a mid range and a high region is carried.

The enclosure laminated the high-density material "reaction mall dead form" original with JBL which has the vibration suppression effect excellent in front particle board first, and has dumped the unnecessary oscillation of the whole enclosure.
Furthermore, in order to decrease a primary reflection of the play sound on the top layer of a baffle which had had a delicate ill effect on the stereo image, the "neo plane form" is adopted as the perimeter of a unit, and the tone-quality failure by the primary reflective sound in a mid-high range is especially made into the minimum.
Moreover, there were two kinds of finish, walnut finish and black finish.


Rating of a mode
Scheme 3 ways, 3 loudspeaker bass-reflex scheme, and a bookshelf type
Unit etc. For low-pass: 30cm cone type (2213H)
For mid ranges: 13cm cone type (104H-3)
For high regions: Dome shape (035Ti)
Frequency characteristic 45Hz - 20kHz
Output sound pressure level 93dB/W/m
Impedance 8ohms
Allowable input (succession) 100W
Cross over frequency 1100Hz, 4200Hz
Dimensions Width 362x height 597x depth of 298.5mm
Weight 20kg