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Jensen 840 manual

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The rules should oblige the seller to give the purchaser an operating instrucion of Jensen 840, along with an item. The lack of an instruction or false information given to customer shall constitute grounds to apply for a complaint because of nonconformity of goods with the contract. In accordance with the law, a customer can receive an instruction in non-paper form; lately graphic and electronic forms of the manuals, as well as instructional videos have been majorly used. A necessary precondition for this is the unmistakable, legible character of an instruction.

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First and foremost, an user manual of Jensen 840 should contain:
- informations concerning technical data of Jensen 840
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Table of contents for the manual

  • Page 1

    P o werPlus Amplifier s Installa tion & Oper a tion Manual Contents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Features and S pecifications . . . . . . . . . . . . . . . 3 Inst allation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .[...]

  • Page 2

    PowerPlus Amplifiers 2 Intr oduction The Jensen PowerPlus seri es of amplif iers were designed to meet or exce ed the CEA-2006 test st andards. These ne w st andards give all particip ating manufacturers (and man y don't particip ate) a baseline when comparing amplifiers of similar power output. The CEA Power rating protects you, the customer [...]

  • Page 3

    PowerP lus Amplifiers 3 F eatures and Specifications Y our ne w PowerPlus Jens en mobile stereo power amplifier is the amplifier of choice for the high de mands of auto sound reproduction. With it s deep-bass reproduction and plenty of reserve power , low harmonic disto rtion and neutral reproduction, the PowerPlus series of amplifiers takes Mobile[...]

  • Page 4

    PowerPlus Amplifiers 4 Installa tion Before you begin the inst allation of your PowerPlus series amp remem ber , there are two ways to do things – right an d twice! Use th e proper installation techniques, tools and accessorie s to en sure that your Jensen PowerPlus series amp will put out all the power it was designed to. If necessary , seek a p[...]

  • Page 5

    PowerP lus Amplifiers 5 P ow er W iring Charging System In some cases, the installa tion of just one (1) amplifier could be enough to overload your factory electrical system (i.e., alter nator). Depending on the state of your electrical sy stem and overall condition o f your vehicle, you may need to upgr ade your altern ator and battery . After the[...]

  • Page 6

    PowerPlus Amplifiers 6 Ground T erminal (GND) Make the ground lead as sh ort as possible, leavin g enough length to comp lete the installatio n and to allow for any ser vice that may b e needed at a later date. T o ensure a good ground, scrape awa y any paint or undercoating to expose bare metal. Use a "ring" terminal of the proper gauge [...]

  • Page 7

    PowerP lus Amplifiers 7 Speak er W iring The S p eaker Wiring diagrams illustrate options for connecting one or two speakers. Observe the proper speaker polarity . NOTE: PowerPlus amplifiers can drive spe akers with a nominal impedance range of 2~ 4-ohms . For maximum power , configure your speakers fo r a no mi na l 2- o hm load . NOTE: Do n ot ov[...]

  • Page 8

    PowerPlus Amplifiers 8 PowerPlus 840/1304 Four S peakers T wo S peakers and Bridged Subwoo fer T wo Subwoofers HPF LPF OFF HPF LPF OFF SPEAKER OUTPUT ++ – + – – + – + BRIDGED – + BRIDGED – CH1 CH2 CH3 CH4 4 ohm nominal 2 ohm minimum 4 ohm nominal 2 ohm minimum HPF LPF OFF HPF LPF OFF SPEAKER OUTPUT ++ – + – – + – + BRIDGED – +[...]

  • Page 9

    PowerP lus Amplifiers 9 Input W iring Most trunk/hatc hback installations will require a 15-20 foot RCA cable, while pickup trucks and under-s eat mounting will require a 6-12 foot R CA cable. Connect an RCA cable from your rece iver to the RCA input on your amplifier . PowerPlus 420/900/1 150/1302 PowerPlus 840/1304 The PowerPlus 1304 and 840 can [...]

  • Page 10

    PowerPlus Amplifiers 10 NOTE: The use of good qualit y RCA cables is just as important a s power and speaker wire. Choose a high qua lity low capacitance cable for the best resu lts. Connecting Additional Amplifiers Pass-Thru RCA connectors are pr ovided to connect additional amplifiers without the need to purchase "Y" a dapters. MODE 432[...]

  • Page 11

    PowerP lus Amplifiers 11 Indicators and Contr ols Power Indicator (POWER) The power indicator provides a visual indication that the amplifier is turned on. Input Level Control (LEVEL/GAIN) The INPUT LEVEL control (or GAIN) matches the output of yo ur radio to the input of the amplifier . Afte r the inst allation is comp lete, make sure the input le[...]

  • Page 12

    PowerPlus Amplifiers 12 Te s t i n g Before finishing the instal lation, perform the following test s to make sure the wiring is correct and everything is ope rating properly . Reconnect Battery When wiring is complete, reconnect th e ba ttery negative terminal. T est Power Wiring T urn on the receiver , but do not turn up the volume. The amplifier[...]

  • Page 13

    PowerP lus Amplifiers 13 T r oubleshooting NOTE: If the pro tection light is acti va ted with no speakers connect ed to the amplifier , and all the power connections are cor rect, this would indicate an int ernal problem with the amplifier . Problem Possible Cause Corrective Ac tion Amplifier does not turn on No power to +12V terminal Check fuse(s)[...]

  • Page 14

    PowerPlus Amplifiers 14 CEA P o wer Output RMS Power Output @ 1% THD+N, 14.4VDC PowerPlus 420 Power Output : 65 watts RMS X 2 channels into 4-ohms @ < 1% THD+N Signal to Noise Ratio : 100dBA below reference (R eference: 1 watt, 4-ohms) Addition al Power Output : 90 watts RMS X 2 channels into 2-ohms @ < 1% THD+N 170 watts RMS X 1 channels (Br[...]