posted
Topic says it all, i need to find out how to turn an amp into a line driver, I was thinking about taking the pos+ output at the amp, and taking a ground from the amp or any where else for that matter, combining them into one, then i would have rca outs, does this sound right or am i missing something? is there any thing i should watch out for? i was planing on useing a small 50x2 amp to run all 28 of my amps, does this sound good?
posted
sounds like it would work but i don't know weither or not it would because the input impedance of most amps is pretty high, and amps are made to run at 4ohm, when you're talking about anywhere from 20k + for rca inputs, all you can do is try. or just buy a line driver, id get an ac four.1.
posted
It will work just fine but there is one thing you need to look at. On most amps that are bridgeable the right channel(for example) has the positive connection is hot and the negative is grounded. On the left channel the negative connection is hot and the positive is grounded. This is easy to check with a continuity checker. If it is the way I mentioned you will need to invert one channel before the amp. Or you can run everything off of one channel, or you could use it as a bridging module if you have strapable amps.
posted
You would just wire a set of RCA's to the stereo output of the amp you use as a line driver. It's nothing difficult to understand really. Leave the amp in STEREO, put your rcas from the head unit to that amp, then attach RCA's to the outputs and feed them to your other amps inputs, and you're set.
One thing to remember though, if you do this, you can't compete in STREET because that amp will count as an amp, not a line driver.
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Posts: 1168 | From: Tucson, AZ, U.S.A. | Registered: Jun 2000
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posted
Ummm, why not just spring for an audio control matrix...? It would really probabbly be a better bet.
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Posts: 1082 | From: Former BS Moderator <IMG SRC= | Registered: Mar 2000
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posted
But how would we know if the voltage was too high or too low for the amps? And how would we know the load it would put on the amp being used to be a line driver? Just how many amps could you run off of a small 50x2 amp? I have one lying around that I can use and I have thought of this before.
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Posts: 195 | From: SA, TX, USA | Registered: May 2000
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quote:Originally posted by 4fifteens: But how would we know if the voltage was too high or too low for the amps? And how would we know the load it would put on the amp being used to be a line driver?
I think you could use a volt meter for seeing how much voltage is being put out by the amp. I think most higher end amps take up to 8 volts for input, and can output (i think) around +-30. You would hook up the small amp and put a voltmeter to the outputs, and play with the volume and gains on that amp. Then you should be able to hook up a similar device to the small amp's power to see how much current is being used. It might be a safe idea to put a low powered relay that would trip before it sends too much or draws too much current.
Good luck, I'm interested in the final details too. I've heard of ppl doing it, but it's kind of hard to find now that we can't search the forums. =(
Dan
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Posts: 192 | From: Fort Washington MD 20744 | Registered: Jun 2000
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