Question about Legacy Audio LA1030 Car Audio Amplifier

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Distorted Bass hi, i have a lagacy LA1030 1000w amp and all was good till about yesterday i just turned it on and it just didnt sound the same, the bass is very distorted it almost sounds as if i were very under powered, but it only pshing one 12" and it was working fine

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Check the specs on the required ohms for the speakers. If it calls for 8 ohms and your speaker is 4, then you are pulling twice the normal current and this has blown an output transistor.

Posted on Mar 02, 2008

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How to adjust Dg11100 car amp


If your head unit has an amp gain, turn it up as high as it will go. If it is hooked up to subs, the head unit will say subwoofer output in the menu. Then take a small screwdriver and turn the amp gain on the side of your amp counterclockwise to zero. Turn your freq. up to about a third. Crank your system up, with a song with good bass, and slowly turn your gain up till the bass from the subs sound distorted, and back it back down. If the bass is drowning out the other speakers in your car, then turn the gain down some more. I find it works best if you have your trebble up high, your mid range at a little less than half. And your bass at zero or one. Your amp is cranking up the bass, so let your other speakers handle the rest. This allows it to sound clearly at higher volumes.

Jan 02, 2013 | Cars & Trucks

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I have a boss cx-3500 amplif & and a rockford p2 15 inch sub & not much punch what can i do to have more punch


mess around with the frequency on the amp till you get a good heavy loud sound and turn up the bass more and make sure the speaker cables are in the correct ports if one is in the other the wrong way around it wont give out as good quality or bass

Aug 20, 2012 | Rockford Fosgate Car Audio & Video

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Carlsbro Bass Reactor 400 bass amp - power section dead


• Could be drive transistor , output transistor or both on the main amp.

But check for power supply and in the preamps also.

• A signal tracer will come in handy when troubleshooting these kind

of symptoms.

• Measure supply voltages,

• Check offset voltage

• Check idling current

Isolate , and trace afterwards.


• Schematic is really needed when there are burnt and unrecognizable

component. But one can use similar schematics to analyze circuit

problem.

Aug 01, 2012 | Audio Players & Recorders

1 Answer

I have a 1800 watt amp but the red light is on but it dose sound like the bass works but not it its prime


the red light is for power in protect mode it should be orange and it will not emmit sound if you think you should have better sounding bass or more bass you can try to play with the gains on the amp or possibly if you have the negative or positive hooked up wrong from a speaker to the amp this will cause the bass to be lower and somewhat distorted double check your positive and negative wires from the speaker to the amp and make sure they are correct

Feb 28, 2010 | Kenwood KAC-9152D Car Audio Amplifier

1 Answer

I have 2 kenwood 3011 400 watts rms and 12oowatts peak power each 1 is blown and wonderin about upgrading 2 the Hifonic Olympus OLM1612 would this be a good upgrade even thought i only a 400 watt kicker...


yea for sure thats a good upgrade. You shouldnt havebeen able to blow the kenwoods with 400 watts though-meaning that they probably blew from distortion which causes heat(fast) Check your gain on the amp start it out at 1/4 gain and turn up your deck to the point where you can hear distortion from your mids and highs or to the maximum level that you listen to your music at. If you're jamming out at a level that is causing distortion then you will be sending a distorted signal to the amp as well. The amp then amplifies the distorted signal through the subs which overheat and blow. So find the distortion spot and then turn it down just a little bit till it clears up your sound-then adjust your gain on the amp up slowly until you cant hear it getting any louder. Once you have done that you have reached the limit of CLEAN power that you are going to get.Thats where you want to keep it. Watch the bass boost too if you have the bass up on the deck and then crank up the bass boost on the amp it really f's up the signal too. Good luck

Jan 31, 2010 | Hifonics OLYMPUS OLM1612 Car Subwoofer

1 Answer

KAC9103d been running great for a year, factory refurb. for a month been losing sub output. checked all connections again, everything good. Turned on went driving 15 minutes later lost bass ckd again red...


Could be that you have a partially roasted(blown) coil on one of your subs which will function- but will keep tripping your amp.You can check that out just by using a different set of subs to listen to and by the process of elimination if the problem goes away then you know where the problem is at.Also check your gains you might be riding the gain a little high which causes distortion which causes heat(FAST) which will cause the amp to shut down completely or some amps will decrease output in a programmed attempt to save itself.turn the bass boost down to half if you even use it at all- that too can cause massive distortion in the amp itself,meaning only that if you have the bass boost on your deck turned up and then you turn the boost up on your amp the sound signal is then WAYYY distorted which will cause a thermal shutdown too. Last thing is to make sure that your subs arent running below 2 ohms because i believe that particular amp is designed to put out about 900 watts at 2 ohms.good luck

Jan 22, 2010 | Kenwood KAC-9103D Car Audio Amplifier

1 Answer

Have installed correctly, but only distorted bass sounds. will not actually work. not sure if the sub is faulty. I have a corsa sxi with a halfords Vibe SLR amp & sub. my head unit is a Kenwood DPX303


Hi there. you need to check that the signal going into you amplifier is not over driven. If it is, you will have the same effect of distorted bass. Turn volume on your radio down to see if that helps. If you have a Line driver and Crossover, then check them aswell. Remeber that your gains are not actually volume controls like people think, but rather level matching adjustments. Shout if you need more info.

Aug 17, 2009 | Car Audio & Video

1 Answer

Amp went into protect, but front speakers sound distorted too


If the amp still goes into protect mode, the easiest thing to do is disconnect the RCA cables from the amp and see if still goes into protect mode (after turning off/on). If it does, the issue lies in the amp or the wiring to/from the amp (most likely case). Check to make sure no speaker wires came loose and touched +12V or ground (car body). From the sound of it, my guess is something internal to the amp died and will need repair.

Mar 22, 2008 | Car Audio & Video

1 Answer

Legacy amp 1200 watts


i have had the exact same problem with the exact same lagacy amp that you have posted, put your ground in a different spot or try double grounds in two different spots this should solve your problem here. good luck

Oct 06, 2006 | Legacy Audio LA770 Car Audio Amplifier

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