Question about Car Amplifiers

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IM getting a whinning noise from my speakers on my 2nd amp

Added a 6 farad cap and a distrubution block, and added a 2nd amp. My original amp and subs work fine, but when i connect speakers on my 2nd amp I get a high pitched whinning noise from those speakers
Also ran the remote wire from my 1st to the 2nd amp , not sure if that is a cause, i have different ground wires running also, not sure if im getting the whinning from a loop or bad ground?
Like i mentioned my system works perfect, its just the 2nd amp i get the noise from when the speakers are hooked up.

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CHANGE YOUR REMOTE WIRE TO A SINGLE LEAD, AND THEN CHECK ALL YOUR CONNECTIONS.

GOOD LUCK

Posted on Dec 12, 2008

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Hey i had 2 car amps +for 4 speakers(140W maxi) and a sub 12inch


1 cap, either .5, 1 or 1.5 farad will be fine. they make 5 10 and 20 farad that cost way more than u need to spend for 400 watts RMS. i like the rockford fosgates, you can get a low cost Tsunami, just make sure you follow the charging instructions.

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Sounds like your amp is over heating. it wouldnt have nothing to do with a power cap as it would just die. your making your amp work to much. look into bying a line driver as this will boost the volume going into the amp wich will also make the subs louder

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run a fused + wire from your battery to the + of the cap ground the - of the cap to a good grounding place on your car run a wire from the + of the cap into a one in two out disburtion block make sre it is a fesud one.then run one wire from each or the two out side of the dis block to each amp then ground both amps to a good ground.what type of amps do you have

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that is possible,but you might need to run an another battery so they can get the suffenent power and you will need a bigger alternater

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you might try unplugging the wires from the sub, turn it back on with the wires disconnected- if the noise comes back the amp is probably bad - if the noise doesn'tcome back -turn your head unit off and reconnect the sub- if the noise comes then your sub's voice coil could be shorted- if the noise comes back you should try a different speaker to compare- if the noise still there with the test speaker your problem is definately the amp.
If these suggestions don't help please e-mail me at Merle840@aol.com i will be glad to help. Please give me a good rating if i have been able to help you M. MERLE

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1 Answer

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You need to run a larger power/ground cable. If you are reading low, you are not getting the kind of voltage that the amplifier requires to run, you may have been fine before adding the other products but if you wired them all to the same power wire (say an 8 gauge) you'd encounter problems. You should probably use a 2 gauge or at least a 4 gauge power kit.

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your amplifier has the following specs:

Output Power at 12V:
1 x 200W @ 4 ohms (0.05% THD, 20Hz - 20kHz)
1 x 400W @ 2 ohms (0.5% THD, 1kHz)
Output Power at 14.4V:
1 x 300W @ 4 ohms (0.05% THD, 20Hz - 20kHz)
1 x 600W @ 2 ohms (0.5% THD, 1kHz)

a .5 farad cap should work fine for 12v applications, a .75 will work fine for 14.4v applications. If you plan on upgrading the stereo system in the future, you should probably just pick up a 1 farad now and save trouble later.

when mounting the cap, mount it as close to the sub as possible. i recommended a deep cycle battery in an earlier solution due to the power handling requirements for the amp and speaker combo, any time you are working on a competition or semi-competition setup, you will want to isolate your audio system as much as possible from your vehicle's main electronics. i normally use a deep cycle battery if it's going to be a comp/street combo as you can sit at the lake and jam all night without killing your main battery. for comp only use, i stick to optima batteries, they seem to work well and can dump loads of amperage pretty quick.

if you go the dual battery route, you will want to buy a battery isolator to make sure the two batteries are independent of each other.

hope this helps,
trin

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try adding a capacitor to feed the amp. these are large in capacity (farads)and dims (about 6' x3' dia.)...what wire size are you using?

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