User manual JL AUDIO E2150

[. . . ] JL AUDIO e2150 two-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. [. . . ] Useful for connection of coaxial or component satellite speaker systems to the e2150 in a bi-amplified system. (Hz)" The filter frequency markings surrounding this rotary control are for reference purposes and are generally accurate to within 1/3 octave or better. If you would like to select the filter cutoff frequency with a higher level of precision, consult the chart in Appendix B (page 11). Tuning Hint: If you are using the e2150 to drive a subwoofer system ("LP" mode) or a component satellite speaker system ("HP" mode), 100 Hz is a good baseline "Filter Freq. After properly adjusting the "Input Sens. ", as outlined in Appendix A (page 10), you can fine tune the "Filter Freq. (Hz)" control to achieve the desired system frequency response. 1) Bass Boost: This switch allows the user to activate a 6 dB boost centered at 48 Hz. When the "Bass Boost" is activated, the inputs to "CH 1 (Left)" and "CH 2 (Right)" are summed to create a mono signal. The "Filter Mode" switch in the "Channel 1 & 2" 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. 6 JL AUDIO e2150 JL AUDIO e2150 7 PRE-OUTS The e2150's "Pre-Outs" connectors output unprocessed (pass-through) left and right channel preamp level signals, permitting connection of additional amplifiers in a system. !I M P O RTA N T Speaker loads below 2 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 e2150 has been designed for bridging of its two channels without the need for input inversion adaptors. To bridge the e2150's two channels, use the "Ch1 +" and "Ch2 ­" speaker connectors only (the "Ch1 ­" and "Ch2 +" remain unused). When bridged, the e2150 will deliver optimum power into a 4 load. channels. In order to achieve one of these options, configure the inputs 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 the e2150, 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 e2150 to drive the left channel speakers only and another e2150 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 possitive (+) wires. 2) Left + Right Channel Information: When bridged and fed by a stereo input, the e2150 will automatically combine the left and right channels into a summed mono (left + right) channel. This option is useful when using the e2150 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: When using either the line level inputs (RCA input connections) or the "High Level Inputs" (four-pin connector), the output signals are identical to the input signals. If the "High Level Inputs" are used, the signal present at the "Pre-Outs" can still be sent to another JL Audio amplifier. In either case, the "Pre-Outs" signals are not affected by any settings in the "Amplifier Controls" or "Bass Boost Controls" sections. SPEAKER OUTPUTS The e2150's speaker outputs are designed to accept 8 AWG - 16 AWG wire. The e2150 is designed to deliver power into speaker loads equal to or greater than 2 when using a "stereo" configuration and speaker loads equal to or greater than 4 when using a "bridged" configuration. To connect the speaker wires to the amplifier, first back out the set screws on the top of the terminal block, using the supplied 2. 5 mm hex wrench. [. . . ] 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 that 1/2 inch (12 mm) of insulation has been stripped from the end of each wire and the bare wire is seated firmly in the terminal block so that no bare wire is exposed. [. . . ]