Bedienungsanleitung JL Audio J2 320 (Seite 6 von 11) (Englisch)

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10 JL Audio

AMPLIFIER STATUS INDICATOR LIGHTS &

PROTECTION CIRCUITRY

There are two status indicator lights on the

control panel of the amplifier.

Off

Filter Mode

High-PassLow-Pass

Filter Frequency (Hz)

Input Sens.

CH 3&4

Input From

min maxmin max 60 1. 2k

High-Pass

60 1. 2k 40 15 0

Low-Pass

40 15 0

Off +12dB

High-Level InputsHigh-Level Inputs

Bass Boost

Off

Filter Mode

1&2

3&4

Off +12dB

Bass Boost

Channel 3 & 4 Controls

CH 1 (Left) CH 3 (Left)

Protect

Channel 1 & 2 Controls

Power

CH 2 (Right)

LEFT

RIGHT CH 4 (Right)

Pre-Outs Amplifier Inputs

Off

Filter Mode

High-PassLow-Pass

Filter Frequency (Hz)

Input Sens.

CH 3&4

Input From

min maxmin max 60 1. 2k

High-Pass

60 1. 2k 40 15 0

Low-Pass

40 15 0

Off +12dB

High-Level InputsHigh-Level Inputs

Bass Boost

Off

Filter Mode

1&2

3&4

Off +12dB

Bass Boost

Channel 3 & 4 Controls

CH 1 (Left) CH 3 (Left)

Protect

Channel 1 & 2 Controls

Power

CH 2 (Right)

LEFT

RIGHT CH 4 (Right)

Pre-Outs Amplifier Inputs

1) “Power” (Green): lights to indicate that the

amplifier is turned on and operating normally.

Located at the far left of the control panel.

2) “Protect” (Red): Indicates that the amplifier

protection circuitry has been activated

to prevent product failure due to thermal

overload, short-circuit or a dangerously

low impedance connected to the amplifier

outputs. Connecting the speaker outputs

to an impedance lower than 2 ohms stereo

(4 ohms bridged) will cause this protection

mode to activate. When this protection mode

is activated, the amplifier will shut down to

protect its circuitry. When the problem is

corrected, the amplifier will return to normal

operation and the “Protect” LED will shut off.

SERVICING YOUR TMA AMPLIFIER

If your amplifier fails or malfunctions, please

return it to your authorized JL Audio dealer so

that it may be sent in to JL Audio for service.

There are no user serviceable parts or fuses inside

the amplifier. The unique nature of the circuitry

in the JL Audio amplifiers requires specifically

trained service personnel. Do not attempt

to service the amplifier yourself or through

unauthorized repair facilities. This will not only

void the warranty, but may result in the creation

of more problems within the amplifier.

If you have any questions about the installation

or setup of the amplifier not covered in this manual,

please contact your dealer or technical support.

JL Audio Technical Support:

(9 5 4) 4 43 -110 0

9:00 AM – 5:30 PM (Eastern Time Zone)

Monday - Friday

BRIDGING CONSIDERATIONS

Bridging is the practice of combining the

output of two amplifier channels to drive a single

load. When bridged, each channel produces

signals of equal magnitude, but opposite polarity.

The combined output of the two channels

provides twice the output voltage available from a

single channel. The J2-320.4 has been designed for

bridging of its channel pairs without the need for

input inversion adaptors.

To bridge a pair of channels, use the

“Left +” and “Right –” speaker connectors only

(the “Left –” and “Right +” remain unused).

When bridged, each channel will deliver

optimum power into a 4 ohm load.

When a pair of channels are bridged, they

will deliver 160W x 1 into a 4 ohm load or

120W x 1 into an 8 ohm load. Operating a

pair of bridged channels into a load lower

than 4 ohms is not recommended.

Because a bridged pair of channels requires that

both channels receive input, you need to

connect both left and right inputs to the source

unit. Connection of only one input will result in

reduced power output, increased distortion and

can cause the amplifier to overheat.

Do not do this!

When a pair of the J2-320.4’s channels are

operating in bridged mode, the output will be in

mono (only one channel). This mono channel

can contain right channel only information,

left channel only information or the sum of

the information from both the right and left

channels. In order to achieve one of these options,

configure the inputs to that pair of channels in

one of these two ways:

1) Left Channel Only or Right Channel Only

Information: If you wish to send a left-only

or right-only signal to a pair of the J2-320.4’s

channels, use a “Y-Adaptor” to split the single

channel signal into both left and right RCA

inputs. This option is useful when using a

pair of the J2-320.4’s channels to drive left

channel speakers only and the other pair of

the J2-320.4’s channels to drive right channel

speakers only.

2) Left + Right Channel Information:

When bridged and fed by a stereo input, a pair

of the J2-320.4’s channels will automatically

combine the left and right channels into a

summed mono (left + right) channel. This

option is useful when using a pair of the

J2-320.4’s channels to drive a subwoofer system

or a summed mono center channel.

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JL Audio J2 320 Seite 6

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