JBL 4312EBK Owner's Manual

12-Inch, 3-Way Studio Monitor

Model 4312EBK

Owner’s Manual

The 4312EBK is a new member of the family of JBL® bookshelf studio monitor speakers that dates back to 1968 with
the original model 4310 Control Monitor.

1. Introduction

Thank you for purchasing the JBL® 4312EBK 3-Way Studio Monitor.
For more than 60 years, JBL has been providing audio equipment for concert halls, recording studios and movie
theaters around the world and has become the hands-down choice of leading recording artists and sound engi­neers. The 4312EBK is a new member of the family of JBL bookshelf studio monitor speakers that dates back to 1968
with the original model 4310 Control Monitor. To get the best performance from your new studio monitor, please read
these instructions thoroughly.

2. Package Contents

Each JBL 4312EBK box contains one (1) JBL 4312EBK studio monitor speaker. If you suspect that there has been ship­ping damage, report it immediately to your dealer. We recommend that you keep the box and packing materials for
future use.

3. Placement

CAUTION: The 4312EBK weighs 39.5 lb (17.9kg). Before placing the speaker on a shelf or platform, be sure
that it is sturdy enough to support the speaker’s weight.

Before deciding where to place your speakers, survey your room and think about placement, using the illustration
below as a guide.

Avoid placing the speakers near power amplifiers, heat registers or •

1.8-2.4 m

other objects that generate large amounts of heat.
Do not place the speakers in very humid or dusty places.•
Do not place the speakers in direct sunlight or where they will be •

40° – 60°

exposed to other strong light.
The 4312EBK is not video-shielded, and may cause picture discol-•

oration or distortion if placed close to some types of TVs. If this
occurs, move the speakers away from the TV until the discoloration
or distortion disappears.

For best results, place the speakers 6–8 feet (1.8-2.4m) apart. •

Listening Position

If you place the speakers farther apart than this, angle them toward
the listening position.

The speakers will produce the most accurate stereo soundstage when the angle between the listener and the •
speakers is between 40 and 60 degrees.

Position each speaker so that its tweeter is approximately at ear level.•
Generally, bass output will increase as the speaker is moved closer to a wall or corner. For best performance, we •

recommend that you place the speakers at least 20 inches (50cm) away from the side walls.

50cm (20”)

4. Connections

CAUTION: Make sure that all of the system’s electrical components are turned OFF (and preferably unplugged
from their AC outlets) before making any connections.

Speakers and amplifiers have corresponding positive and negative (“+” and “–”)
connection terminals. The 4312EBK has color-coded connection terminals. The “+”
terminal is red, while the “–” terminal is black. See the illustration on the right.

The 4312EBK is designed so that a positive voltage at the “+” (red) terminal will cause the
speaker drivers to move outward (toward the room).

We recommend using a high-quality speaker wire with polarity coding. The side of the wire
with a ridge or other coding is usually considered positive polarity (“+”).

STUDIO MONITOR MODEL 4312EBK2

Negative (–)

Terminals

Positive (+)

Terminals