BASS BOOST CONTROLS
1)Bass Boost (Channels 5&6): This switch allows the user to activate a 6 dB boost centered at 48 Hz for channels 3&4. When the “Bass Boost”
in the “Channel 5 & 6 Controls” section is activated, the inputs to “CH 5 (Left)” and “CH 6 (Right)” are summed to create a mono signal. The “Filter Mode” switch in the “Channel 5 & 6” section must be in the “LP” position for the bass boost to be functional.
2)Remote Bass Port: This port allows you to connect an optional remote boost knob (sold separately, JL Audio Model RBC-1) that can be mounted in the front of the vehicle. With the RBC-1 connected, the boost is no longer limited to 0 or +6 dB, allowing a range of 0 - 12 dB of boost to be selected.
SPEAKER OUTPUTS
The e6450’s speaker outputs are designed to accept 8 AWG - 16 AWG wire.
Each pair of the e6450’s channels are designed to deliver power into speaker loads equal to or greater that 2Ω when using a “stereo” configuration and speaker loads equal to or greater than 4Ω when using a “bridged” configuration.
!
IMPORTANT
Speaker loads below 2Ω nominal per channel are not recommended and may cause the amplifier to initiate a protection mode and shut itself off.
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 e6450 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 4Ω load.
!
IMPORTANT
When a pair of channels are bridged, they will deliver 150W x 1 into a 4Ω load or 90W x 1 into an 8Ω load. Operating a pair of bridged channels into a load lower than 4Ω 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 e6450’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 e6450’s channels, use a “Y-Adaptor” to split the single channel signal into both left and right RCA inputs (or parallel- connect both positive and both negative high-level input connections to a single channel source signal). This option is useful when using one pair of the e6450’s channels to drive left channel speakers only and another pair of the e6450’s channels to drive right channel speakers only.
!
IMPORTANT
When parallel-connecting both positive and both negative high-level input connections as described above, make sure to connect negative (–) wires to negative (–) wires and positive (+) wires to positive
(+)wires.
2)Left + Right Channel Information: When bridged and fed by a stereo input, a pair of the e6450’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 e6450’s channels to drive a subwoofer system or a summed mono center channel.
AMPLIFIER STATUS INDICATOR LIGHTS /
PROTECTION CIRCUITRY
There are two status indicator lights on the
input / control end of the amplifier:
1)“Power” (Green): lights to indicate that the amplifier is turned on and operating normally.
2)“Protect” (Red): lights or flashes to indicate that the amplifier protection circuitry has been activated to prevent product failure.
a)If the red “Protect” indicator lights steadily (without flashing), the amplifier has exceeded its safe operating temperature.This causes the amplifier to shut off in order to protect its circuitry. When the amplifier’s temperature drops to a safe level, the red
“Protect” indicator will shut off and the amplifier will return to normal operation.
b)If the red “Protect” indicator flashes intermittently, the protection circuitry has detected a short-circuit or a dangerously low impedance connected to the amplifier output(s). Connecting
the speaker outputs to an impedance lower than
2Ω stereo (4Ω bridged) will cause this protection mode to activate.The amplifier’s output may cycle on and off when this protection mode is activated. When the problem is eliminated, the amplifier will return to normal operation.
SERVICINGYOUR JL AUDIO 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 the JL AUDIO Technical Department for assistance: (954) 443-1100
9:00 AM – 5:30 PM Eastern Time,
Monday – Friday
