 problem with amp, im confused |
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 Jul 10, 2004 - 3:26 PM
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 Enthusiast  Joined Feb 19, '04 From austin tx Currently Offline Reputation: 1 (100%)  |
I just put in a 200w pioneer amp to power my MB quarts in the front. I have an EQ on my headunit, and i have it adjusted so i can just change the bass and treble depending on what i want to listen to. My problem is that when i have my bass up and the stereo playing pretty loud, my amp cuts out. The low pass filter is off, gain at normal, and its running to crossovers. Any ideas as to why it cuts out on me? BTW, i thought it was my ground, but it looked fine. I re-did the ground anyways, but its still doing the same thing.
Thanks --------------------  |
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Jul 10, 2004 - 3:30 PM
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 Enthusiast Joined Nov 27, '03 Currently Offline Reputation: 0 (0%) |
You are probably asking to much of your amp. You are telling it to put out more power to the speakers/subs than it should. Pushing your subs to the max isn't always a good idea (though it is fun sometimes), you could really mess the stuff up. You also might be over heating it. Make sure it is located in a place where it can breath well, with good airflow.
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Jul 10, 2004 - 3:45 PM
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Enthusiast Joined Feb 19, '04 From austin tx Currently Offline Reputation: 1 (100%) |
Thanks for the quick reply. I have a seperate amp going to my subs. I dont think im overheating it because it hasnt been running for a while, and its got plenty of airflow. Is there anything i can do by adjusting the gain? I know the gain isnt just adjusting the power output, im not really sure exactly what it does/ how it works. Usually i dont run it that loud, but it would be nice at certain times.
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Jul 10, 2004 - 3:46 PM
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 Enthusiast Joined Jan 8, '04 From LA Currently Offline Reputation: 0 (0%) |
ur asking too much bass of the MB's apparently... or something. this is weird.
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Jul 10, 2004 - 4:03 PM
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Enthusiast Joined Feb 19, '04 From austin tx Currently Offline Reputation: 1 (100%) |
The power handling of the MBs are 50-140, and the amp puts out 50w rms x 2. The speakers themselves are fine, theres no distortion at all at high volumes, so im pretty sure its got something to do with the amp, but i dont know what. Thanks again guys.
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Jul 10, 2004 - 4:15 PM
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Enthusiast Joined Jan 8, '04 From LA Currently Offline Reputation: 0 (0%) |
If you're running at minimum power, there SHOULD be distortion when you turn it on loud. Distortion is when the speakers try and replicate sounds louder than their current power load will let them. So anything above minimum to moderate volume on your MBs at that level should be causing distortion- the only power level that shouldn't cause distortion is if you were pumping 150W into each. Your amp might in fact, be overheating. Despite the fans working and the ample airflow etc. The MBs trying to suck too much power through the amp might instantly cause this. My advice, get a new amp that meets the optimum power requirements of the MBs- and not just the minimum |
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Jul 10, 2004 - 5:09 PM
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Enthusiast Joined Feb 19, '04 From austin tx Currently Offline Reputation: 1 (100%) |
When it does cut out, its only for a second or two, thats why i thought it was a ground at first. However, when it does cut out, the amp light stays on. And, the amp is not even hot to the touch.
Anyways, i looked at what "normal" was on the amp gain, and it turns out to be 500mV. My HU is 4v. I turned it down and i think i matched it pretty close. It seems to be working good now, but ill let you guys know otherwise. Thanks for the help -------------------- |
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Jul 15, 2004 - 7:56 AM
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 Enthusiast Joined Dec 5, '02 From Sacramento, CA Currently Offline Reputation: 0 (0%) |
Another possibility, if it is still giving you problems. you may want to check the voltage coming from your power source... some amps are picky about voltage and just turn off... you may need an new alternator...
ed. |
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Jul 15, 2004 - 11:43 AM
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 Administrator Joined Aug 23, '02 From Seattle, WA Currently Offline Reputation: 14 (100%) |
That would be my guess too...the sub amp is maybe drawing so much power when you turn the bass up that it's draining your electrical system and producing too low of a voltage for the front stage amp possibly. What sub amp are you running? How many watts is it? What size is the power wire going to the amp for the front stage? And do your headlights dim badly when the bass is up at night? Sorry for all the questions, but some answers can help us help you even more. 
-------------------- New Toyota project coming soon...
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Jul 18, 2004 - 8:51 AM
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Enthusiast Joined Feb 19, '04 From austin tx Currently Offline Reputation: 1 (100%) |
The sub amp is not the one cutting out. Its a pioneer, 760w max, 380w RMS, running it at 4ohms bridged. Ive got 8g wire running to the amp for the fronts, its a pioneer as well.
My headlights barely dim, if at all, but I also did new grounds (off of the battery and in the engine bay) with 4g wire. Ill check the voltage when i get a chance. 12v under idle? I really dont know why it would just cut out for 2 seconds at a time. -------------------- |
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Jul 18, 2004 - 11:17 AM
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Enthusiast Joined Jan 8, '04 From LA Currently Offline Reputation: 0 (0%) |
Definetly check the voltage
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Jul 18, 2004 - 11:30 AM
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 Enthusiast Joined Jun 10, '03 From FL Currently Offline Reputation: 0 (0%) |
i know this sounds dumb but redo all of your connections to your amp. my 2 type r's were requiring too much power for my amp (which the amp IS capable of producing) and the connetions werent very good so my amp kept going into protect mode and cutting out. so i went to home depo and got some of those little eye dealies, and hooked it up beautifully.
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Jul 18, 2004 - 1:35 PM
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Enthusiast Joined Jan 8, '04 From LA Currently Offline Reputation: 0 (0%) |
This happ to me too... |
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Jul 18, 2004 - 3:05 PM
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 Enthusiast Joined Oct 3, '02 From Va Team 6gc Currently Offline Reputation: 1 (100%) |
u might also want to find a new ground, u always want your ground to be shorter than your power wire.
--------------------  All I have in this world is my Balls and my Word and I'm not breaking em for no one,- Tony Montana Team 6gc 2005 |
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Jul 18, 2004 - 9:53 PM
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Enthusiast Joined Apr 4, '04 From VA, USA Currently Offline Reputation: 0 (0%) |
1) bigger wires (4G then distrubution block to 8G)
2) power capacitor OT it is acutally more damaging to the speaker when u underpower it, instead of over powering it |
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Jul 18, 2004 - 10:49 PM
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Enthusiast Joined Feb 19, '04 From austin tx Currently Offline Reputation: 1 (100%) |
Ill check the voltage and redo the connections whenever i get time. My ground is only about a foot and half long, ill see if i can get a better connection for that as well
as always thanks for the help -------------------- |
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Jul 26, 2004 - 11:20 AM
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Enthusiast Joined Feb 19, '04 From austin tx Currently Offline Reputation: 1 (100%) |
Voltage was 12.5 at idle. Still having the same problem.
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Jul 26, 2004 - 1:23 PM
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 Enthusiast Joined Sep 21, '03 From Los Angeles & Santa Barbara County Currently Offline Reputation: 0 (0%) |
I really think u need a capacitor to supply constant power to ur amps, if that doesnt work try checking all ur fuses. Sometimes when the fuses get loose shiet like that happens
-------------------- Whatchu Know Bout In Dash Tv's? - Mike Jones....WHO?
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Jul 26, 2004 - 5:40 PM
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Enthusiast Joined Feb 19, '04 From austin tx Currently Offline Reputation: 1 (100%) |
Ill be checking those then..
So who has a cap that i can borrow for a little while? ha Would i be able to hook up one cap to both amps? -------------------- |
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Aug 2, 2004 - 12:27 PM
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Enthusiast Joined May 3, '04 From Alhambra 62001 Currently Offline Reputation: 0 (0%) |
Had the same problem with my first amp...now about 12 amps later I would say you were asking to much of the amp and your over heating it. Your going to end up frying the amp!
J- |
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