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Autotek Bass Thrust 44 Wiring

I can't remember what the wires go to on the Autotek Bass Thrust 44. There is a plug that has a remote wire and speaker outputs but I don't know what they are. Help?!?!?

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  • s60six May 11, 2010

    what colors are the wires?



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Thin blue wire is the remote wire and goes to the deck remote line
large diam wire goes to battery
large diam "black" goes to ground
rca ... wires with the metal ends plug into the white and red holes
you have two sets of speaker wire comming off the amp also
hope this helps

Posted on Dec 26, 2008


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Easy fix. The factory has fitted a special socket to connect direct to factory speakers. Just cut this off and connect the wiring from your new speakers to the factory wiring. Use insulated connectors or solder and tape up the wiring. Make sure that the speaker wire with a "trace" or line of colour through it marries up with the same wire in the car. Cheers.

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Why is there four plugs on the back of speakers?

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I got an autotek bts 7150 which is the positive and negetive speaker wires?

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Autotek XS-900.4 stuck in protect mode


The amp does not go on protection only because of wiring or power source problem , but also and mainly when there is an internal fault.

Protection is started whenever an out-of range voltage value is detected from the controller circuit.

Protection can be triggered from a burnt final IC or from a speaker wiring problem.

Since you have ruled out speake, wiring and power source problems, then this Amp is probably defective

If the Amp works fine on a different vehicle, then protection mode may start either because speakers impedance is not within Amp specs, or because the amp has a too big power draw. In this last case the problem is fixed installing a capacitor on the Amp 12V line.



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No sound to remote speakers in dining & deck areas.

Incoming from WHAT? Ampifiers accept inputs via RCA connections and send amplified audio to the speakers via the + and - OUTPUT terminals.

I'm guessing your colored wires are from your speakers and that there is a piece of this puzzle we do not see - how the speakers on the deck and in the dining area are wired.

You say, "was working ok previously"... previous to WHAT? Something changed.

You can probably troubleshoot and resolve this yourself.

Set the amp to a medium output level.

If the wires are simply leading to either or both pairs of speakers you could select any two of them and connect them to one side of the amp. Only a pair going to the same speaker(s) will produce sound. Once you identify one pair, the other pair probably goes to the other speakers. Connect them to the other channel output.

The last piece would be to establish correct phasing between the speakers. Bass response will suffer if they're not IN-phase. Play something with substantial bass. Listen closely, then reverse the wires on one side only. Test again. If it IMPROVES you have it right. If it losses bass, put the wires back the way they were.

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2 - take and other cable gage 8 and ground it at the body of your car make sure that is no paint when you plug it and plug the other cable in your power amp at the grn plug
3 - pass a other cable gage 18 to the radio to the back or your car. plug it to the blue radio cable marcked remote or rem and p;lug the other side to your power amp to the rem pin
4 - then pass 2 rca cable from the radio to the back of your car the radio side plug it to the sub or rear output rca cable and the same thing for the power amp
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good lock

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I have a BMW 318i 1993 and when i got it there was a big speaker and amp hooked up. I unhooked it but now i cant get any sound....the radio lites up but no sound. i know speakers work cuz they worked...

Hello pinkpimpin20,

Without knowing exactly what modifications were made to the factory sound system, it's difficult to point you to a particular fix. The number of channels on the "big amp" that you disconnected would help. Even the make and model.

But, from your description it's possible that the previous owner installed a multichannel amp to drive both the "extra bass speaker", usually referred to as a subwoofer, and the original vehicle speakers. In that case, the speaker wiring from the head unit (receiver) was cut and the receiver side of the wires was rerouted to the input of the aftermarket amp. The output of the amp was then connected to the other ends of the speaker wiring.

To restore to the original, you need to pull the stock receiver and resplice the wiring. If the previous owner cut the plug completely, it may be necessary to purchase a replacement from your BMW dealers service or parts department. It's possible, but not likely that the previous owner used both an aftermarket "harness" and an aftermarket "reverse harness" to avoid having to cut the wiring. In that case, all you'd have to do would be remove them and plug the radio harness back into the vehicle harness (or the back of the radio). But most DIY audio enthusists don't mind butchering the vehicle wiring. And you'll probably find that electrical tape was used to secure the wiring. After a year or so under the dash, it'll be a sticky mess to unravel.

The speaker wiring colors for the '93 318i are as follows:

Left Front Speaker Wire (+): Yellow/Red
Left Front Speaker Wire (-): Brown/Orange
Right Front Speaker Wire (+): Black/Red
Right Front Speaker Wire (-): Brown/Orange
Left Rear Speaker Wire (+): Yellow/Black
Left Rear Speaker Wire (-): Black/Orange
Right Rear Speaker Wire (+): Blue/Black
Right Rear Speaker Wire (-): Brown/Orange

Hope this helps.

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