User manual JL AUDIO E6450

[. . . ] JL AUDIO e6450 six-channel full-range amplifier o w n e r 's m a n u a l Thank you for purchasing a JL Audio amplifier for your automotive sound system. Your amplifier has been designed and manufactured to exacting standards in order to ensure years of musical enjoyment in your vehicle. For maximum performance and extended warranty coverage, we highly recommend that you have your new amplifier installed by an authorized JL Audio dealer. Your authorized dealer has the training, expertise and installation equipment to ensure optimum performance from this product. [. . . ] 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 4 load. 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 2 when using a "stereo" configuration and speaker loads equal to or greater than 4 when using a "bridged" configuration. 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 parallelconnect 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. !I M P O RTA N T 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: !I M P O RTA N T When a pair of channels are bridged, they will deliver 150W x 1 into a 4 load or 90W x 1 into an 8 load. Operating a pair of bridged channels into a load lower than 4 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. 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 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. [. . . ] The speaker wire connectors are designed to accept up to 12 AWG wire. Make sure to strip the wire to allow for a sufficient connection with the metal inside the terminal block. "MY AMPLIFIER'S OUTPUT FLUCTUATES WHEN I TAP ON IT OR HIT A BUMP" Check the connections to the amplifier. Make sure that the insulation for all wires has been stripped back far enough to allow a good contact area inside the terminal block. [. . . ]