A little advice please,,,

[dale351]

//content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif I,ve nothing fancy for a system,,but I do like my music and bass. I noticed this morning my bass tube(self powered) was not working. I am getting power to all the connections I am supposed to, but I have one thing that confuses me a little. I have continuity between the RCA cables, you know, wire to wire. I am thinking something gave in my head unit, it is a little old. Anyone have any advice as to what may have happened or a possible solution,,please give some direction. I have no real ideal what to at this moment. The system is working fine other than the tube not. Thanks all,,, //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

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[reed8857 10+ year member]

what do you mean self powered? Is the amp getting powered?

 

[dale351]

Yeah, its a powered tube,,and it is getting all the power to right places when it should

 

[johnecon2001 5,000+ posts]

check the signal cables form the deck, might have gotten pinched or disconnected.

 

[dale351]

Checked the cables, no pinching or any other damage,,it is strange,,,I understand having continuity between the outside(shield) part of the cables,,but I dont think you should have it between the center parts of the cables,,but I dont know,,how do you test to see if anything is getting to the speaker itself,,,is there a way to read a signal there??

 

[dale351]

I guess no one has any other ideals,,,the way its acting, I believe the amp has burnt out,,,guess I am SOL,,,thanks anyway fellas

 

[req 5,000+ posts]

there are two parts to a RCA, the outer part and the inner part. the outer side (looks like a flat ring) this is the negative or ground terminal. then there is the little shaft thing inside the flat ring, this is the postative terminal. heres the best diagram i could find;

(disregard the weird writing - im sure this was not meant for a car audio picture //content.invisioncic.com/y282845/emoticons/toast.gif.bc0657bf54b9ee653b6438524461341e.gif, so the "12-" is your posative wire, and the "12+" is your ground.)

use a multimeter and touch BOTH POSATIVE for continuity and check BOTH GROUNDS for continuity... if that all checks, do POS\NEG for continuity, and if there is... your cable is fukced.

also check the RCA OUTPUTS the same way, but check for DC VOLTAGE (1~5ish volts is what you should see) - touch the red prod to the inside of the connector, and touch the black prod to the outside, and check for the voltage... if you get nigh on zero, (when the HU is on) then you got a problem.

otherwise, it sounds like an amp issue.

 

[dale351]

Yeah,,,I did all that too,,,thanks,, I believe it is time for some shopping,,,