User manual JL AUDIO E4300

[. . . ] JL AUDIO e4300 four-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 e4300 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. !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 possitive (+) wires. 2) Left + Right Channel Information: When bridged and fed by a stereo input, a pair of the e4300'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 e4300's channels to drive a subwoofer system or a summed mono center channel. 8 JL AUDIO e4300 JL AUDIO e4300 9 AMPLIFIER STATUS INDICATOR LIGHTS / PROTECTION CIRCUITRY There are two status indicator lights on the input / control end of the amplifier: SERVICING YOUR 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 SYSTEM CONFIGURATIONS The e4300 is a flexible amplifier, well-suited for a multitude of system configurations. In this section, the most likely configurations are explained in detail. Once you have selected your desired configuration, you can use the amplifier panel drawing on pages 18 & 19 to mark the required switch positions for easy reference. BI-AMPLIFIED SYSTEMS Bi-amplified systems are defined as systems in which separate amplifier channels drive lowfrequency (LF) and high-frequency (HF) speakers and are separately filtered to send appropriate frequency ranges to each speaker system. The most common application of bi-amplification in mobile audio is to drive a subwoofer system from one or more amplifiers or channels and component speakers from separate amplifiers or channels. The e4300 can be configured to drive a biamplified system by itself or with a separate subwoofer amplifier. BI-AMPLIFIED SYSTEM WITH ONE e4300 In this configuration, channels 3&4 of the e4300 will drive subwoofers (stereo 75W x 2 at 2 or bridged 150W x 1 at 4) with low-pass filtering. Channels 1&2 will drive component speakers in stereo (75W x 2 at 2) with high-pass filtering. Input connection options for a bi-amplified system with one e4300 are as follows: A) No User Adjustability Required: a basic source unit or processor with one pair of stereo outputs. Input Connections: a single pair of stereo source unit outputs connected to the "CH 1 (Left)" and "CH 2 (Right)" inputs of the e4300 (select "1&2" on the "CH 3&4 Input From" switch. Result: the relative level of the LF and HF channels will be fixed by the e4300's "Input Sens. " settings and will not be user adjustable from the front of the vehicle. HF Level Required: a source unit or processor with two pairs of stereo outputs. Input Connections: the first stereo pair source unit outputs is connected to the "CH 1 (Left)" and "CH 2 (Right)" inputs of the e4300. The second stereo pair of source unit outputs is connected to 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. [. . . ] This output level can vary greatly between amplifiers but it should not be in the millivolt range with the source unit at half volume. If you are reading sufficient voltage, check your speaker connections as explained below. Check to ensure that the speaker wires are making a good connection with the metal inside the terminal block. Make sure to strip the wire to allow for a sufficient connection with the metal inside the terminal block. [. . . ]