Question about Legacy Audio LA1030 Car Audio Amplifier

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Protect Mode my Amp (Legacy LA1030) keeps going on protect for no reason. i have a 4ohm sub wired bridged across channel 1 and 2 and 3 and 4 are blank with no input or output. and i know its a problem with the setup i have. because its fine till i start to adjust it on the channel with the sub on it (1 and 2), when i turn the amp adjustments up, it goes on protect. it has nothing to do with channel 3 and 4 as far as i can tell. how can i fix it? i just want it to be able to push my sub.

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Your probably not pusing enough wattage to the amp. Look into buying a capacitor for your set up. and you may need to run a thicker guage wire to your amp.

Posted on Jun 01, 2009

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How to wire a crossfire vr602 2 channel amp at 4ohm and 2ohm


I would be more worried about the amp than the speakers, those subs should handle the watts with no problem. The problem will be in the amps ability to remain working with a bridged 2 ohm load. It may not even stay on without going into protect mode with a 2 ohm load. If it does stay on then it may get really hot and shut off from the heat off of the Mosfett Transistors, or it could burn the Mosfetts from driving them too hard. Basically it's your choice, run your amp hard and gain more volume or run it with slightly less sound and have a cleaner sounding more stable amp that will stay on and have less chance of being damaged. If it's not loud enough the best thing to do is buy a different amp that better suits your needs and fits the application. In your case a 2 ohm stable Mono amp is going to be your best bet or a 4 channel amp bridged into 2 channels and run with 4 ohms on each channel. Or another exact matching amp like your 2 channel amp bridge them both and have each powering 1 of your 4 ohm subs. I used two VR mono amps to power my two 12" 4 ohm subs for a few years

Apr 03, 2013 | Crossfire VR602 Car Audio Amplifier

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How do I wire up my 4subs in bridged to my peace 2600


Hi,

Please state the subs impedance, but assuming 4 subs with 8Ohm Voice Coil you CAN'T run them in parallel in Bridge Mono because this amp's minimum impedance is 4Ohm in bridge and 2Ohm stereo, maybe a series/parallel connection work, but what's the advantage to run them in Bridge mode? This amp delivers 900W per channel at 4Ohm, you can run a pair paralleled for each channel in a safe way and without the high-risk of your amp being destroyed, besides, amp power at 4Ohm Bridged is NOT recommended for continuous use, let me know your results...

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Hi, I want to know what is the best way to wire these subs. (Pair). I have heard of several ways. I have a 4 channel amp the soundstream picasso 4.760. Bridged it produces the most power. I was told...


Hello , I will be glad to help you.As far as your speakers..It depends on what impedance your subs are rated and if your Picasso amp can be bridged at 4ohm or 8ohm. If your subs are 8ohm each you can wire your subs in parallel and wire them to picasso amp in bridged mode. If your subs are 4ohm each.Then wire the subs in series then wire them to amp in bridged mode..caution do not wire subs in parallel if they are 4ohm .This would bring impedance to about 2 ohms and would be harsh for amp to handle...Goodluck

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Is that on all the time or are you saying the light is on? If that light is always on that just means it's protecting your amp. If it's off and not playing bass then your in trouble

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1300a, no sound, protect light


if u have the amp bridged un bridge it. chack an see wat the ohms are on the subs an make sure the amp is stable to carry the ohm load..if u have 4ohm subs one sub per channel then u shud be fine that wud make the amp see 4ohms but if u have dual voice coil subs it cud be the configuration of the subs..here's a link on how to wire subs hope this help..http://mobile.jlaudio.com/support_pages.php?page_id=145

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1 Answer

I have a PHOENIX GOLD RYVAL V1502 amplifier and trying to hook it up at 2 ohms as it describes it can be 450watts x2 at 2 ohms running wires from bridged positive and negative to the first sub then two...


Hello mgonzalez390,

It sounds like the amp/subs impedance is not matched. According to the published specifications for the V1502 amp, it is only stable in bridged mode down to 4ohms, not 2ohms. You need to get the final impedance that the amp sees up to at least 4ohms or it will continue to shut down and eventually fail completely.

If your subs are dual voice coil and can be rewired so that each sub has an impedance of 8ohms, then you can safely parallel them to the amp like you have described. If they are single 4ohm voice coils, then you have 2 choices. Connect one sub to each channel or if you want to bridge the channels, then wire the subs in series, not in parallel. Wire the positive bridged terminal from the amp to the first sub positive, connect a jumper from the negative of that sub to positive on the other sub, and then the negative from that sub back to the negative bridged terminal on the amp. This wiring results in an 8ohm load to the amp and it should work OK without shutting down. But the power to each sub will actually be less than if you wire them separately to each channel.

Hope this helps.

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1 Answer

LA-1030 Protect Mode


you have an unloaded channel,so the voltage is exceeding what the protect circuit is supposed to see.you have to connect an 8 ohm resistor across the output of the unused channel.
do not drive a signal into it or you will smoke the resistor.
a 10 watt will do ok with zero signal input

May 23, 2009 | Legacy Audio LA1030 Car Audio Amplifier

1 Answer

Kole amp in protect mode?


Are you setting the bridge switch for both left and right or are you trying to run both subs off of one set of terminals? If you running the subs off one set of terminals you are effectively running the amp below 2ohms and thus the amp is not 2ohm stable and you will destroy it.

Some amps actually all ready run a bridged output for left/right operation, this could also be the reason why the protection circuit is kicking on.

Either way it's a component mismatch and you either need a stronger amp or different subwoofer setup.

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