JBL 4307 Owner'S Manual Download Page 2

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Thank YOu FOr ChOOsing This  

JBL

®

 PrODuCT

Thank you for purchasing this JBL speaker system. Please read though 

this owners manual carefully before using the speakers, 

and then sit back and enjoy excellent playback sound made possible 

through their correct connection and placement. 

unPaCking ThE sPEakErs

We recommend saving the cushioning and other packing materials, even 
after unpacking the product from the carton box. Harman International 
Japan will not be responsible for damage caused by improper packaging 
when using materials other than those of the original carton box when 
transporting the units for moving, repairs, or other reasons.

 

 

 

 

 

 

PLaCEMEnT

•  The speakers are not magnetically shielded. Therefore, if placed 

near a CRT television, colors on the screen may become distorted. If 
this occurs, move the speaker system slightly further away from the 
television.

•  Speaker systems are durable consumer goods. Their lifespan can be 

shortened due to effects from temperature, humidity, ultraviolet light, 
etc. Please keep the speakers away from bright light fixtures and direct 
sunlight, and from places with high temperatures, such as near the 
exhaust outlets of air conditioners or heaters. Also, please refrain from 
placing the speaker system in closed automobiles or next to windows 
with direct sunlight.

sPEakEr PLaCEMEnT

•  he environment in which speakers are placed generally has a strong 

influence on the sound quality of low frequencies. If you place the 
speakers in corners of your room, lower frequencies will be enhanced, 
and while this will allow you to savor a rich, deep bass, it will also be a 
dull sound with no edge. On the other hand, when placed away from the 
wall, the sound will be sharp and clean, even though you sacrifice some 
of the heavy bass. We recommend that you make the final decision on 
the placement of the speaker system while actually playing some of your 
favorite music.

• In order to get the best stereo effect, please place the left and right 

speakers at an equal distance to the left and right in front of the listener. 
While the sound field will become wider as more space is placed between 
the left and right speakers, the stereo-image quality of center-oriented 
elements such as vocals will weaken. Please adjust the space between 
the speakers to match the distance with the listening position.

• The sound localization for these speakers is the center of the treble unit, 

and placing your ears at a listening position at this height will provide the 
best sound localization and sound field. Adjust the height of the system 
using commercially available speaker stands and racks.

COnnECTiOns

CAUTION: When connecting speakers to an amplifier, please do so after 
turning the amplifier off. If you connect the speakers while the power is still 
on, it could damage the amplifier and speakers.
This speaker system uses color-coded speaker terminals, with red for + 
and black for −. Connect commercially available speaker cables to the 
terminals in back while paying attention to the polarity.
*When using loose end cables on which the protective shield has been 
peeled back, please be careful that the metal parts of the terminal do 
not bite into the protective shield. This could interrupt sound due to poor 
connection.
Also, since there is the possibility of a short circuit if the leads of the cables 
touch, please do not peel back too far on the protective shield.

   

 

 

 

 

 

 

LEVEL aDJusTMEnT

The speaker system is equipped to allow users to adjust the levels for mid 
and high frequencies, which are easily influenced by factors such as the 
size and construction of the room. Adjust to your preferred tone using the 
knobs on the left baffle control panel on the unit while listening to music 
with which you are familiar. The upper “HF LEVEL” knob adjusts the level 
of the high frequency tweeter, and the lower “MF LEVEL” knob adjusts the 
mid level frequencies of the mid-range unit.
The levels of each band increase when turning the knobs clockwise, and 
decrease when turning them counter clockwise. The “0 dB” position is the 
standard position for a normal listening environment.

*The relationship between the volume level on the amplifier and 
the amount of sound from the speakers can differ depending on 
the characteristics of the equipment, such as the efficiency and 
impedance of the speakers, output characteristics of the amplifier 
and the output level of the source equipment (such as a CD player), 
as well as the combination of these. When using this speaker system 
 
in combination with an amplifier that has low output, if the bass is 
enhanced and the volume is raised to an excessive level using the 
tone control or other method, clipping will occur due to distortion in 
the amplifier output, and this could damage the speakers even if the 
power is below the maximum recommended amplifier input. If you 
sense any abnormalities in sound, please lower the volume.

   

 

 

 

 

 

 

MainTEnanCE

When the speaker set becomes dirty, wipe with a soft, dry cloth. 
Never use liquids that contain volatile solvents such as paint thinner 
or benzene to clean the system. Also, please be careful not to apply 
any spray pesticides.
If the grille net becomes dusty, remove the dust using a vacuum 
cleaner. When doing so, please adjust the power on the vacuum 
cleaner so the suction is not too strong. Also, do not wash the grille 
with water. This may cause discoloration and sagging of the grille to 
occur.

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