The JBL® 4312 E studio monitor is the direct descendent of the legendary Model 4310,

the original JBL monitor that forever changed audio recording, introduced in 1968. As you

would expect of a true JBL studio monitor, the 4312 E delivers crisp, powerful bass at all

listening levels with a massive 300mm (12-inch) woofer driven by a Differential Drive®

(U.S. patent no. 5,748,760 and other patents pending) dual 75mm (3-inch) voice-coil

assembly. A 125mm (5-inch) pure-pulp cone and 25mm (1-inch) copper voice coil with

Kapton® bobbin realistically reproduce the full dynamics of vocal performances with low

distortion, even at the highest listening levels. A 25mm (1-inch) tweeter with a magnesium/

aluminium alloy dome extends HF response far beyond the audible range of the human ear.

Built in mirror-image pairs to create the detailed, coherent stereo soundstage that studio

monitors must, the JBL 4312 E exceeds the expectations of critical listeners and music

professionals alike, providing a listening experience of such richness and subtlety that it

cannot be compared to anything but a live performance.

Features

The loudspeakers are configured in mirrorimage

pairs to create a focused stereo

soundstage ideal for monitor applications.

Extremely rigid, heavily braced enclosures of

19mm (3/4-inch) PB with 19mm (3/4-inch)

MDF baffles ensure that the transducers are

held in precise alignment

Front-mounted port provides optimal woofer

tuning for extended bass response and

permits speaker to be placed against a wall

Continuously variable MF and HF

attenuators let users tailor driver output to

suit room acoustics or personal preference

Five-way binding-post connectors permit

the use of any type of wire and termination

Pebble-texture black vinyl finish with

silkscreened JBL logos

2213Nd-2 Low-Frequency Transducer

A 300mm (12-inch) woofer cone with a Differential Drive dual 75mm (3-inch) voice-coil

assembly delivers deep, crisp bass at all listening levels. Dual neodymium magnets in

push-pull configuration maintain precise control over the cone’s motion and dissipate heat

more effectively than conventional magnetic assemblies for low-distortion, high-output

performance. The voice coil utilizes patented Low TCR Alloy wire which reduces power

compression and greatly enhancing dynamics and transient detail. The die-cast aluminium

frame further dissipates heat, increasing power handling, and the shallow, Aquaplascoated

cone is optimally damped to reduce distortion.

105H-1 Midrange Transducer

A 125mm (5-inch) polymer-coated, pure-pulp cone with a 25mm (1-inch) copper voice coil

with Kapton bobbin combine to produce flat response with low distortion and increased

power handling for more dynamic performance at high listening levels. A die-cast frame

minimizes back pressure for more linear motion, lower distortion and more naturalsounding

reproduction of voices.

054ALMg-1 High-Frequency Transducer

A 25mm (1-inch) magnesium/aluminium alloy dome produces realistic dynamics far

beyond the range of human hearing, with ultrasmooth response that is ideal for SACD™

and other high-resolution audio formats. A shallow horn and phase plug ensure the HF

sound is distributed evenly over a wide listening area.

Technical Specifications

Low-frequency transducer: 300mm (12")

neodymium Differential Drive cone driver with

dual 75mm (3") voice coils utilizing patented

Low TCR Alloy Edge-Wound wire, castaluminium

frame and an Aquaplas-coated

cone (2213Nd-2)

Midrange transducer: 125mm (5") polymercoated,

pure-pulp cone driver (105H-1)

High-frequency transducer: 25mm

(1") magnesium/aluminium alloy dome

(054ALMg-1)

Recommended amplifier power:

200 watts RMS

Frequency response: 40Hz – 40kHz (–6dB)

Nominal impedance: 6 ohms

Sensitivity: 93dB (2.83V/1m)

Crossover frequencies: 2000Hz, 5000Hz

Controls: Attenuators for MF and HF drivers

Enclosure type: 19mm (3/4") particle board

(PB) with 19mm (3/4") medium-density

fibreboard (MDF) baffle, ported, shipped in

mirror-image pairs

Connector type: Five-way binding posts

Finish: Pebble-texture black vinyl

Grille colour: Black

Dimensions (H x W x D): 597mm x 362mm x

300mm (23-1/2" x 14-1/4" x 12")

Weight: 17.9kg (39.5 lb)