legacy la 2088 2400 watt amplifier
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=99586
Printed Date: April 19, 2024 at 1:01 PM
Topic: legacy la 2088 2400 watt amplifier
Posted By: s_goodie
Subject: legacy la 2088 2400 watt amplifier
Date Posted: December 02, 2007 at 2:23 PM
i have recently purchased a lagacy la-2088 2400 watt amplifier and when i hook it up its really weird like it powers the subwoofer but it makes weird noises and when i turn the blinker on it bumps with the sound of the blinker does anyone know wahtwrong with it
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Stuey BABE
Replies:
Posted By: aznboi3644
Date Posted: December 02, 2007 at 2:46 PM
VERY poor quailty amp.
How is your amp grounded???
Posted By: s_goodie
Date Posted: December 02, 2007 at 2:48 PM
it is groudned great beacuse i hooked up a differnt amp and it dosnt do it so idk i just wish there is a way that i would maybe do something with it to fix it cause i have no money and its my only amp
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Stuey BABE
Posted By: Alpine Guy
Date Posted: December 02, 2007 at 2:50 PM
They use very very low quality components that pick up RF noise easily, just as said above, make sure you grounds are perfect.
Also, id like to add, those amps are MAJORLY over rated, you'll be luck to get 240 watts rms out of it, yet alone 2400 lol.
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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.
Posted By: s_goodie
Date Posted: December 02, 2007 at 2:53 PM
yeah idk andi have another wuestion kinda off subject how do i change from being a rookie?.. and could it have to do with the rca's?
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Stuey BABE
Posted By: stevdart
Date Posted: December 02, 2007 at 3:17 PM
Yes, better RCAs will often change your status from rookie. But then again, using Lagacy and wuestions like your are, it may not work. ------------- Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.
Posted By: s_goodie
Date Posted: December 02, 2007 at 6:18 PM
it is bolted to the bottom of the car
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Stuey BABE
Posted By: i am an idiot
Date Posted: December 02, 2007 at 7:37 PM
Goody you are correct in assuming the problem is with the RCA. You have a burnt trace on the circuit board of your amplifiier. If you can tell me which speaker wires are the bridge wires I can get your amp working for you. Is bridge Left positive and Right negative? Or are they Left negative and Right positive?
Posted By: s_goodie
Date Posted: December 02, 2007 at 9:22 PM
left is positive and right is negative
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Stuey BABE
Posted By: haemphyst
Date Posted: December 03, 2007 at 1:06 AM
Alpine Guy wrote:
Also, id like to add, those amps are MAJORLY over rated, you'll be luck to get 240 watts rms out of it, yet alone 2400 lol.
I get 216WPC RMS. 150 dollars for 450 watts, SHIPPED! A good buy, that was! 50A Max current draw, and Class A/B to boot! ------------- It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."
Posted By: i am an idiot
Date Posted: December 03, 2007 at 2:41 PM
Connect a small wire from the left Negative speaker wire and touch it to the RCA cable. If this makes the noise Go away you will need to solder the wire to the RCA cable. Or of course you could take the amp apart and follow the trace from the RCA input jack and find the point that it is broken and solder a jumper across the broken trace.
Posted By: d_stever
Date Posted: December 09, 2007 at 9:58 PM
the last few legacy amps i have had, had bad rca connects(the peice that solders on to the board) in them, ive just replaced them with new ones from radio shack and ive never had a problem with noise out of them.
Posted By: howmuchlonger
Date Posted: December 10, 2007 at 6:09 PM
"It's bolted to the bottom of your car"? This could be your issue. When you attach the chasis of the amp directly to the chasis of your car you can cause ground loop issues. You typically want to isolate the chasis of your amplifiers from your car.(thats why some amps have gromets on the mounting holes. I have always made my installers run an extra 18 ga wire w/ their remote wire to connect between their ground (radio) to ground (amp). Stinger kits have always come w/it might as well use it. Never have noise issues. How long is your amp ground? Where is it gounded? Make sure it's not grounded to a removable part I.E. tail light bolt ------------- Test it w/your meter!!!
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