ampo turn off noise?

[djjdnap 10+ year member]

how do you get rid of this.

It only does it for my sub amp. you know you cut the car off and you hear, bluapunk, lol. but idk the gain is on 0. dont know what it could be.

Click to read more...

 

[YungGunna313 10+ year member]

yea i kno what ur talkin about ive heard that sound before, ive heard that it has somethin to do with the current and the woofers bein cut off and it doesnt hurt the subs, but i could be wrong im not so sure

 

[djjdnap 10+ year member]

nah it doesn't hurt it, just really irritating.

I'll mess with a few wires and hope it goes away, or down.

 

[flakko 5,000+ posts]

hmm its wierd i used to have that when i had my profile amp, but when i switched to viper, it duznt do that anymore.

 

[jsloan10 10+ year member]

I think that the a turn OFF thump coming from subs is an indicator of an insufficient ground. I assume you already have decent power and ground wires for your amp but did you upgrade the the batterys negative terminal grounds?, thats usually where the bottleneck occurs. The wire going from the - terminal to the fender and the ground strap on the engine are the only ways for the amp ground to get back the battery unless you have run the ground cable directly to the negative terminal on the battery.

 

[cjjackson85 5,000+ posts]

No it isn't...

 

[flakko 5,000+ posts]

No it isn't...

x2 it ONly happened when i had my profile. everthing stayed the same, except the amp was different.

 

[jsloan10 10+ year member]

Just quoting from FAQs ive read, I would just get a different amp personnally.

 

[zachzchw 5,000+ posts]

Just quoting from FAQs ive read, I would just get a different amp personnally.

Wouldnt it be better to try to get rid of the problem than to get a different amp?

Theres several threads about on/off thump, search for them.

 

[jsloan10 10+ year member]

'Cuts and pastes'

2.2 My system "pops" when I turn it off. What is happening and how

can I get rid of it? [JD]

=====================================================================

This kind of problem is often caused by transients in the signal

processor as it powers down finding their way into the signal path,

which the amplifier then transmits to the speakers.

Usually this can be solved by adding a little turn-off delay to the

processor. This allows the processor to stay powered on for a short

time after the amplifiers have powered down, thus preventing the pop.

Many components sold today (such as crossovers, equalizers, etc) have

delays built-in. Read your manual to see if it is possible to set this

delay on your piece of equipment or be sure to look for this feature

during your next car audio purchase.

If your processor does not have this feature, you can build your own

delay circuit with a diode and a capacitor. Add a 1N4004 diode in

series with the processor's turn-on lead, striped side towards the EQ.

Then add a capacitor in parallel, the (+) side of the cap connects to

the striped (processor) side of the diode, the (-) side of the cap goes

to ground (not the radio or EQ chassis - connect to the car chassis).

Experimenting with the cap value will give you the right amount of delay

before the EQ shuts off. You don't want it too long, just long enough to

make sure the amp is off before the EQ powers down. 220 - 1000 uF is

about right, and make sure the cap is a polarized electrolytic, 16V or

higher. Also keep in mind that the diode will introduce a 0.7V drop on

the remote wire, which can cause the processor to power down before the

rest of the system.

 

[djjdnap 10+ year member]

hmmm, i actaully did search and that was the only one i came up with also^^^.

and yea, i have changed all the wire under the hood,

I mean its funny because for instance, i didn't have alt whine right, take the amp out, put it back in and it whines. some funny wiring going on in my car i guess.