JBL P-4040, P-4020 Amplifier Features, About This Manual, Installation Precautions and Notes

Thank you for purchasing your new JBL Power Series™ amplifier. Power Series amplifiers feature the latest advances in discrete-circuit topology, ensuring low distortion and superbly clean and clear sound quality. In addition to RCA-type pre-amp inputs, Power Series amplifiers feature Universal Interface™, designed to facilitate integra- tion with factory-installed audio systems for distortion-free performance that rivals conventional pre-amp connections. Included in the Universal Interface circuit is Common Sense™ turn-on. Common Sense turn-on senses the common-mode voltage present on the speaker outputs of factory and aftermarket radios, turning on the amplifier without a separate remote wire. All Power Series amplifiers feature built-in electronic crossovers and pre-amp outputs for easy system expansion with- out requiring outboard processors.

Amplifier Features

•4-, 3- or 2-channel operation (P-4040)

2- or 1-channel operation (P-4020)

•Simultaneous stereo and mono operation

•Built-in 12dB/oct electronic crossover

•Balanced differential input

•Pre-amp outputs (filtered on P-4040)

•Oversized Floating Rail Mosfet Power Supply

•Universal Interface

•Common Sense turn-on

•Variable input sensitivity (250mV–4V)

•Fully complementary, direct coupled discrete power amplifier circuitry

•Gold-plated power, input and output connectors

•2-Ohm stable (stereo)

•JBL badge lights when amp is operat- ing and flashes when protection circuit is activated

•Made in USA

About This Manual

To attain maximum amplifier perfor- mance, we encourage you to read the remaining pages before installing and operating your new JBL Power Series amplifier. Especially review the Applications section for ideas on design- ing and expanding your system. Also, save these instructions for future refer- ence. Important: Installation of automo- tive stereo components can require extensive experience in performing a variety of electrical and mechanical pro- cedures. Although these instructions explain how to install a JBL Power Series amplifier in a general sense, they do not show the exact installation methods for your particular vehicle. If you do not have the experience necessary, do not attempt the installation yourself; instead ask your Authorized JBL Car-Audio Dealer about professional installation options.

Installation Precautions and Notes

•The JBL P-4020 (or P-4040) has five levels of circuit protection that monitor the amplifier and will shut it down if the electrical system voltage drops below 5Vdc or exceeds 18Vdc, temper- atures are above 194° F (90° C), short circuits occur, or current draw exceeds product specifications. For best perfor- mance, check the intended mounting site to make sure the operating envi- ronment does not create conditions that will trigger the protection circuit.

•Prior to installation, turn off all audio systems and other electrical devices. Also disconnect the (–) negative lead from the vehicle’s battery.

•At the installation site, locate and make a note of all fuel lines, hydraulic brake lines and electrical wiring. Use extreme caution when cutting or drilling in and around these areas.

•Check clearances on both sides of a planned mounting surface before drilling any holes or installing any screws. Remember that mounting screws can extend behind the mount- ing surface.

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