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Sub cutting out only when I drive


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genuinedraft8 
Member - Posts: 8
Member spacespace
Joined: October 26, 2004
Location: United States
Posted: October 27, 2004 at 10:23 PM / IP Logged  
Has this happened to any of you, and/or can anyone help me fix this?
My amplifier works fine, the sub works fine, everything is all good... until I accelerate. In other words, the system only works when I'm idle, or with the engine off.
Any kind of acceleration will cut the sub, but the amp light stays lit.
I have a cap that I havent wired yet, do you think this will help? This just doesn't make sense to me.
Alternator? Battery? Something...?
Blake
I'm trying to learn... trying.
lolzitsmtss 
Copper - Posts: 174
Copper spacespace
Joined: April 29, 2004
Location: United States
Posted: October 27, 2004 at 10:54 PM / IP Logged  
Check the ground..had a simliar problem and found out it was the ground.
I guess that guy has subs.
genuinedraft8 
Member - Posts: 8
Member spacespace
Joined: October 26, 2004
Location: United States
Posted: October 28, 2004 at 5:55 PM / IP Logged  
No it's not the ground...
The problem has changed a bit though.
Now the problem is, the amp works only when the motor is not running. When I start the car, the amp goes into protected mode. Why???
This is only the subwoofer amp too, the interior amp works fine, car on or off.
Sub cutting out only when I drive -- posted image.
I'm trying to learn... trying.
furflier 
Copper - Posts: 236
Copper spacespace
Joined: June 14, 2004
Location: United States
Posted: October 28, 2004 at 7:12 PM / IP Logged  
What size power wire do you have running to your amp?
94legend 
Silver - Posts: 237
Silver spacespace
Joined: June 27, 2004
Location: United States
Posted: October 28, 2004 at 8:31 PM / IP Logged  
Its definitely your REM / POwer wire, Either directly from your deck to the amp, or the Terminals on your amp. Review your wires be sure that they are clean  and tight.
genuinedraft8 
Member - Posts: 8
Member spacespace
Joined: October 26, 2004
Location: United States
Posted: October 28, 2004 at 9:23 PM / IP Logged  
I don't think it's the Remote wire, because the amp turns on. The only problem is that when the engine is on, it goes into protected mode, and yet it works fine when the key is at position 2 (right before ignition). This makes me doubt the power wire is at fault either.
This just doesn't make sense to me. There should be no difference between key position 2 and the car running.
Any other suggestions?
Thanks,
Blake
I'm trying to learn... trying.
Poormanq45 
Silver - Posts: 597
Silver spacespace
Joined: October 27, 2004
Location: United States
Posted: October 28, 2004 at 9:37 PM / IP Logged  
Some amplifiers have an over-voltage and under-voltage protection circuit built in. It is possible that your amplifier is either putting out too high or too low of a voltage.
When the car is off, you only draw power from the battery. When the car is on, the car itself draws alot of power. This increased draw may be enough to "trip" the under/over voltage protection.
Poormanq45 
Silver - Posts: 597
Silver spacespace
Joined: October 27, 2004
Location: United States
Posted: October 28, 2004 at 9:38 PM / IP Logged  
Some amplifiers have an over-voltage and under-voltage protection circuit built in. It is possible that your alternator is either putting out too high or too low of a voltage.
When the car is off, you only draw power from the battery. When the car is on, the car itself draws alot of power. This increased draw may be enough to "trip" the under/over voltage protection.
stevdart 
Platinum - Posts: 5,816
Platinum spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spaceThis member consistently provides reliable informationspace
Joined: January 24, 2004
Location: Pennsylvania, United States
Posted: October 28, 2004 at 9:47 PM / IP Logged  
Work out the problem before going to a cap for the solution.  Poorman may have nailed it, and to add to that...with the engine running the power comes from the alternator which is usually going to be about 14 volts.  So, it sounds like an input voltage problem.  I suspect it might be on the high side instead of too low.  The remedy I would try is to turn the amp gain down to a less sensitive level.
Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.
Alpine Guy 
Platinum - Posts: 2,478
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Joined: October 18, 2003
Location: Canada
Posted: October 28, 2004 at 10:09 PM / IP Logged  

I had that problem in my truck , ,still have it actualy.....For some reason ther is a very low level ground signal on my ignition wires, and it was making my amps do wacky stuff,    try jumping the positive directly to the rem on the amp.

2003 Chevy Avalanche,Eclipse CD7000,Morel Elate 5,Adire Extremis,Alpine PDX-4.150, 15" TC-3000, 2 Alpine PDX-1.1000, 470Amp HO Alt.
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