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I think one of my channels blown how can i check to know for sure

I have an soundtream 700sd amp. its a two channel amp one of them works perfectly when i plug in the subs but when i put the same subs on the other channel it doesnt do anything. how can i check if the channel is blown.

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Try switching your RCA cables around from the one that you know is getting sound. It may jsut be a bad rca or output from your radio!!

Posted on Sep 07, 2009

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1 Answer

Got a 4 channel amp but can only use 2 channels, dont know why//


Did you check the fuses on the amp. If one of them has blown, this will shut it down. You will also need to check to make sure your RCA cables from the unit aren't crimped. This could kill the signal. Have you swaped the RCA cables to see if the other side works. If so and it still doesn't, check thos fuses. If this still doesn't help, you may have internal problems with your amp. Hope this helps

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Check to see if speaker is blown use another speaker. If it is not blown then your amp has a blown channel local audio shops may know of where to find repairs for your amp. hope this helps.

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Check the fine tuning for that channel.Adjust + or - accordingly, see what happens?

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I'm assuming you mean channels 2 and 4? If you tried new cables and you know they work then you might wanna check to see if there is a 2,3,or 4 channel switch on the amp or just a switch that reads bridged. If a switch on an amp is set to bridged or 2 channels, whatever type of switch there is, then it would make the amp only run 2 channels. If there is'nt a switch and you have a signal on the cable your using then you may have some shorted transistors. Make sure you definately have a signal first before thinking some transistors are shorted. Take the rca's from the 2 channels that work and put them into the inputs cause you know those channels are working. Let me know what you find, I would like to help you more if you still have problems after this. I also do amplifire repair cheap. I have my own business and most of my customers are from this site, so if you need it repaired then I can help you out on this as well. Just send me a private message. Good luck

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Subwoofer buldging out problem


When speakers are wired in the wrong way the will do the "pushing out" you're describing. Basically the polarities have been reversed and if kept like this over a period of time will blow the speaker. Best thing to do is to disconnect the power by the negative on the amp and take out the fuse from the power supply. Check the wires running from the amp to the subs, negative to negative and positive to positive. I know it sounds basic but many people do mix it up! I would also check to see what channels the subs have been wired into?

Best way is to have one sub from channel 1 and the other sub from channel 2 for example. Or if its a bridged 4 channel amp, have 1 sub running from channel 1&2, and the second sub running from channel 3&4 still making sure of the polarities. Again this all depending what kind of amp and sub you have.

-----------------------------
For example;
A 4 channel (bridged) 1000W amp. 250W max per channel or 500W per 2 channels! So if you have 2 500W subs, by connecting one to a single channel will decrease subs ability due to the lack of power supplied. However by combining 2 channels you optimize the output!
---------------------------

Once you know all your wiring from your amp to subs are ok/good connections/good wires etc you shouldnt have to "wiggle the wires" to get it to work as this is just a bad connection. Also ensure that no 2 wires are touching. Make sure that the master volume on the amp is turned down. You dont need this to be on loud at all, in fact far from it or you'll risk damaging both the amp and subs!

Hope this helps!

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Finals/outputs are toast. Get it serviced to get back to sweet music...accordianman

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try turnind down the sub from the amp itself it might be putting out more volts than the subs input can handle check your standing wave feature to make sure the trim is not up too high

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