ok i have two questions. ok i have a whinning sound coming from my speakers. ive checked the ground on the amp and it is grounded. the amp is only pushing 2 4x6 kenwoods. and the amp is a boss 200 watt amp. yes very crappy amp. maybe its that. but is there any way to get rid of that annoyning whine in the speakers. only when the car is on. or when i give it gas it gets louder. but if i turn the amp down the whine getter lower. thanks for the help on that one.
and on the other question. my am/fm quit working. i took the dvd player out and check all the lines and everything is good. has anybody had this problem before?
thanks for the comments in advance
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It sounds like you need a ground loop isolator (I think that is what it is called, having trouble remembering right now).
The whine is called alternator whine. It is very common and hard to fix. The ground loop isolator is basically a band-aid. I would try regrounding your amp. Choose a different location (not the seatbelt bolts - haven't had luck there), and make sure it is bare metal. Your ground should have a quality terminal on the end of the wire and be bolted down securely. We always solder our terminals that were crimped at the end of the wire. This may get rid of your noise.
If the Am/Fm isn't working, check your antenna. It may have come out of the cd player, or the tip may have broken off. My brother had the same problem and the tip had broken off the cable somehow.
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Cheap amps usually don't have DC-DC converters so they set their rails up around the - terminal. If this isn't VERY close to your signal ground, you'll get whine. More expensive amps have full PWM power supplies with virtual grounds that assume signal ground so there is no ground loop. You could buy all kinds of isolators, but for a few more bucks, you can buy a quality amp.
If your amp is what I think it is, and has a regular 14-0-14 power supply, it's pretty much the same amp found in head units with a bigger heatsink. The reason all head units are suspiciously similar in power ratings is because they're limited to the same 14-0-14 power supply.
One thing that will help is mounting the amp very close to the head unit and sharing its ground terminal.
If you've got a DMM, unplug the amp, check the resistance between the signal ground (outer ring of the RCA jack) and the - terminal. If the resistance is <1, it probably doesn't have a DC-DC converter and you're better off just running the speakers off the head unit.
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For the whining sound.Do you have anything else possibly hooked up to your remote turn on wire behind the deck? Possibly for power for neons or glow gauges?Because that's why mine whine sometimes..
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i have the same problem as well, i had a ground loop isolater on my amp, but do you install that to the radio or at the amp?
