Question about Jensen 100W x 4 Amplifier KA5 Car Audio Amplifier

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I need a vrcd400-sdu modular plug diagram

I want to use this Virtual Reality Sound Labs stereo in my second car, but need a diagram to attach wires to the modular plug socket. Only one plug was included with the unit, and it's 3,000 miles away right now. The user manual does not list the data needed. VRSL does not supply data from their web site.

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Re: I need a vrcd400-sdu modular plug diagram

I had to rewire my whole thing but i got all my wires right.
NOTE:this is if you are looking directly at back of the unit

x fl rl rr fr x R Y RCA-in sub-out Antenna
O O O O O O O O + O-white O-white O
x fl rl rr fr x B
O O O O O O O O - O-red O-red

X= not used
+= positive wires
-= negative wires
fl= front left speaker
rl=rear lrft speaker
rr= rear right speaker
fr= front right speaker
R= red power (ignition) wire
Y= 12v memory
B= chassis ground

im pretty sure thats about it if your having trouble reading this email me at im more than glad to help cause i know how it is trying to figure all this stuff out .

Posted on Jun 13, 2008

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Re: I need a vrcd400-sdu modular plug diagram

You can try for the plug in any small outlets in your city.... i don think tht gettin aplug for tht is not a big deal

Posted on Jan 06, 2008

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What should my setting be on car stereo...Keeps shutting off subs at half available volume.

If your amp is shutting off when you turn up the volume it means that it's clipping. This is very bad for both your subs and amp. The reason this happens is because your amp doesn't supply enough wattage for your subs and the capacitors are being drained of power causing your subs to cut out. As far as ohms this is not a setting. It is resistance and is very very important to have your ohm load correct or it can cause damage to your amp n subs. For a better understanding of ohm loads visit and put the number of subs and the ohm value and it will give you the wiring diagrams for the different ohm loads. then u need to look at your amp manual to see what ohm loads it is stable at.

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No sound but green light is on

First of all Id like to state that Reality car amps arent the best quality amps on the market and they normally will burn out on you. From what you are telling me it looks like your sub outs are defective, the output signal from the car amplifier is dead usually due to weak or defective terminals or poor soldering by the manufacturer, very common with lower quality amps. My suggestion is to replace the amp with at least a mid grade amp like a sony xplod or pioneer amp , if money is an issue then you can have the outputs checked out , check the wiring and also make sure that your ground is solid and making good contact to the cars chassis otherwise you wont get sound. Check the Amp turn on cable which is the small blue wire and check that your radio has the amp turn on or subwoofer signal turned on. Let me know your status and Ill do my best to help you out.

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I really have two questons. the first is that the light of the panel on my stereo is always on. whats that from? the other is that i have a sound system in my car. i know its the head unit. when ever my...

Hi There. This may be line noise.

Check that your head unit and amplifiers etc are all earthed to the same earth. ie: If connected to the battery earth then connect all earths to battery, or if connected to body earth then connect all to body earth.

Another thing is to check that your RCA Cable or interconnects are not running with your power wires. This can induce line noise.

If all is correct then get yourself a noise suppressor or a ground loop isolator.

Hope this helps

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email the maker of the unit and ask for one

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Please help me!!

bwqueen-What type of vehicle are you installing it into,cause some vehicles have built in factory amplifiers.The ones with factory amps need a remote turn on to power up the speakers,let me know and I'll try to help you. cooltek Mar,4/08

Mar 02, 2008 | Jensen 100W x 4 Amplifier KA5 Car Audio...

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Missing the speaker wiring

ya, usually you wont get that part in any outlet. its better you try for it in a junk yard or somethin lik tht.

Jan 04, 2008 | Jensen 100W x 4 Amplifier KA5 Car Audio...

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Hi Theaternut,


Best guess is that your source button or whichever button changes from cd, to Tuner, to usb, to Card, is shorted, and needs cleaning.  Its like the button is always pushed.


see if you can carefully dsiassembly the reciever to get to the circuit board behind the button I speak of, and clean it.

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LED turns on, but power light doesnt and there is no sound coming out of it.

it sounds to me like you have a bad ground or a short in the ground wire. try checking the ground cable as well as theremote wire (blue), and make sure the ground is connected to an unpainted,clean surface such as the frame of your car.

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does your usb device use batteries,some device require.

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