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2nd Generation (2000-2004) Specific discussion of the second generation Toyota Avalon

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Old 05-10-2011, 10:32 PM   #1 (permalink)
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Lights dim when subs hits

I have an '00 Avy with stock JBL sounds and radio except for subs. replace the factory subs with aftermarket amp and subs(2 12"{in trunk}). I also have 6 LED strips on while car is on. So i was driving earlier, at a stop light, i notice the lights in the car dim when subs hit.
is this safe? What can I do to have the lights not dim at all?

and the amp is place on trunk mat(carpet) so it gets really hot, any suggesting to make it run cooler?

BTW i changed battery in February.
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Old 05-10-2011, 10:42 PM   #2 (permalink)
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Relay harness?
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Old 05-10-2011, 10:43 PM   #3 (permalink)
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Add a cap
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Old 05-10-2011, 10:45 PM   #4 (permalink)
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Quote:
Originally Posted by 11LE View Post
Relay harness?
Have no knowledge about relay harness for the subs and amp?
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Old 05-10-2011, 10:45 PM   #5 (permalink)
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Quote:
Originally Posted by exclusive View Post
Add a cap
thats a no no, a cap puts even more strain on your electrical. do the big 3 if you havent already done so and maybe look into a optima yellow top, or if you have the cash look into a new alternator.
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Old 05-10-2011, 10:46 PM   #6 (permalink)
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Swap amps, Get a digital, they use less amps for the same watts to the subs. I am a big fan of Alpines PDX series,,,, here is about the cheapest place I have found. http://www.onlinecarstereo.com/CarAu..._PDX-1600.aspx


Or you could try putting in a cap, you will hear a lot of people say they don't do anything, but that hasn't been my experience. I had a couple of 12's in a system that would do just what you describe until I put a cap in the system.

http://www.onlinecarstereo.com/produ...apacitors.aspx
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Old 05-10-2011, 10:49 PM   #7 (permalink)
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Quote:
Originally Posted by aznlunatic206 View Post
thats a no no, a cap puts even more strain on your electrical. do the big 3 if you havent already done so and maybe look into a optima yellow top, or if you have the cash look into a new alternator.


How does adding more reserve capacity add more strain? You still will only get whatever the amp is able to deliver, it will just smooth out the dips during high load (big hits).
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Old 05-10-2011, 10:49 PM   #8 (permalink)
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How so? You add a cap so when the system needs more power than your oem battery provides, the cap will supplement the battery.
Are you experiencing dimming constantly or only when you're bumping it loud?
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Old 05-10-2011, 10:49 PM   #9 (permalink)
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Originally Posted by exclusive View Post
Add a cap
I just looked that up on crutchfield and its the solution to my problem. Thank you.

do you know where i can find cheap cap? crutchfield has them for $100
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Old 05-10-2011, 10:51 PM   #10 (permalink)
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Originally Posted by KoG506 View Post
I just looked that up on crutchfield and its the solution to my problem. Thank you.

do you know where i can find cheap cap? crutchfield has them for $100
If you look at my post I gave you a link to a couple hundred cheap to not so cheap.
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Old 05-10-2011, 10:59 PM   #11 (permalink)
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Quote:
Originally Posted by exclusive View Post
How so? You add a cap so when the system needs more power than your oem battery provides, the cap will supplement the battery.
Are you experiencing dimming constantly or only when you're bumping it loud?
When the subs hits loud, not constant dimming.

Quote:
Originally Posted by heartdisease View Post
If you look at my post I gave you a link to a couple hundred cheap to not so cheap.
sorry that post did not appear when i reload my browser. but thank you though!
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Old 05-10-2011, 11:03 PM   #12 (permalink)
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Quote:
Originally Posted by aznlunatic206 View Post
thats a no no, a cap puts even more strain on your electrical. do the big 3 if you havent already done so and maybe look into a optima yellow top, or if you have the cash look into a new alternator.
QFTW caps are only bandaids to the problem.
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Old 05-10-2011, 11:17 PM   #13 (permalink)
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do the big 3 or use bigger gauge wire for your system. the cap will damage your alt. in the long run.

Try to adjust your gain and set all the speaker voltage output correctly.

Also dont mount your amp on carpet, mount it on a piece of board then mount it on carpet.
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Old 05-11-2011, 04:33 AM   #14 (permalink)
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yeah the capacitor will do you no good, if you read around in different audio forums, they make it sound like thats what you need, but a lot of audiophiles will tell you a capacitor will do you more damage then good. Do the big 3 or get a high output alternator. My lights never dim and i'm running 1500 true watts and i also have a 200amp h/o alt.
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Old 05-11-2011, 08:49 AM   #15 (permalink)
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If you are going to do a cap make sure you get the right one for your amp. Their capacity is measured in farads,I believe is 1/2 a farad is good for 500 watts. Rockford fosgate makes good ones, try and get 1 with a digital reader so you always know what's the voltage on it and install it as close to the amp as possible therefore theres less resistance in current flow. I got 1 for my dads 95 camry and problem solved, i did not have to do the big 3 upgrade because the load was not that heavy and the car stock wiring could handle the audio upgrade after the cap.

Last edited by lbachatu809; 05-11-2011 at 09:14 AM.
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