Jbl 4312A Brochure

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JBL 4312A Control Monitor

When you listen to recorded music, youre listening to
the end result of a complex process. Each instrumental
and vocal track is recorded separately. Then the tracks
(frequently as many as 32 or even 48) are mixed to give
the right sound.The final mix is used to cut a master

to allow production of LPs and compact discs.

At each step of this process, the recording engineers

and producers must determine when the sound is exactly
right. They depend on their studio monitor loudspeakers
to give them that sound, to let them hear every note the
way it was played. So recording studios are very particular
about which monitor loudspeaker they use. And most US.
studios (68.5%, according to the most recent Bil/board
magazine survey) choose JBL monitors.

While JBL makes a wide range of studio monitor loud-
speakers, the most popular model has been a three-way,
12-inch control monitor. The current version of this speaker
is the 4312A, which incorporates all the latest JBL advances
in loudspeaker technology while retaining the classic
sound that has made the model so popular.

Why a JBL Monitor in your home?

Because most studios use JBL monitors, chances are
excellent that any recording you have was recorded, mixed
or mastered using JBL speakers. And with a JBL 4312A
Control Monitor, youll hear exactly what the recording
engineer heard when the tracks were laid down, when the
recording was mixed, when the master was cut. Youll hear
your recordings the way the artists and their producers
intended they should be heard.

A recording engineer would say that the JBL 4312A offers
wide-band reproduction at the high sound pressure levels
required for studio work. What that means for you is that
you can play your music loudly and get all the punch and
clarity of the original performance.

The 4312A was designed for control room installations,
smaller studios, mixdown faci ities, and the like. As many
of these rooms are about the size of the average living
room, the JBL 4312A is equal y at home there. In addition,
while the JBL 4312A can hand e lots of power,
you dont need a lot to get hign volume from
it. The monitor is twice as efficient as the
typical home bookshelf mode.

In short, a pair of JBL 4312A Control Monitors
will give you recording studio sound at home,
without the expense of buying the whole
recording studio.

Inside the JBL 4312A

One reason studios choose JBL (in addition
to the good sound) is that JBL loudspeakers
are simply built better. The attention to detail

is obvious when you look at the oiled walnut

Ferrite magnet

JBL Symmetrical Field Geometry

Symmetrical I - -
magnetic field _. , /:.:\\ \

Cast back plate Flux SlablllZan Fling

Photographed at Westlake Studio. Los Angeles. Caltt.

or studio black enclosure finish, at the brushed finish of
the individual drivers.This attention is more than skin deep.
Throughout the speaker, only the best-quality parts are
used. (Most of these parts are manufactured by JBL,
because the desired quality is not available elsewhere.)
Critical assembly steps are done by hand, and quality
assurance checks are performed throughout the
manufacturing process.

Technical information:
Low Frequency Loudspeaker

The 300mm (12 in) low frequency transducer of the 4312A
utilizes JBLs unique SFG (Symmetrical Field Geometry)
magnetic structure to produce deep, powerful, clean bass.
The SFG innovations-the symmetrical magnetic field at
the voice coil gap and the aluminum Flux Stabilizing Ring-
dramatically reduce the second harmonic distortion found
in conventional drivers. A powerful magnet and large
75mm (3 in) voice coil give the driver high power handling
capability, further reduction of distortion, and outstanding
transient response. The surface of the cone is coated with
an exclusive damping formulation that provides the precise
mass and density necessary to optimize bass performance
and prevent spurious resonance.This results in smooth
response extending into the midrange frequencies.

Conventional Magnetic Assembly

Vent for better

heat dissmation No vent Non-symmetrical

-E - magnetic field

\

' :\|\\\

Ferrite magnet

Pole piece Pole piece No Flux Stabilizing Ring

Stamped back plate

Crosssections of the low frequency driver of the JBL 4312A and at a conventional magnetic assembly